JP2002123251A - Picture data output device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture data output device capable of continuously reading for each area from a memory storing picture data. SOLUTION: An area setting part 2 checks an overlapping part of a 1st picture and a 2nd picture, and sets the areas p, q1, q2, q3, r. Then, the area setting part provides an address setting part 4 with the information presenting pictures in which the coordinate positions of the set areas and the areas are displayed. The address setting part 4 sets the address of the picture data to be outputted from the information on the read coordinates provided by the coordinate setting part 3 and the information on the coordinate positions of each area provided by the area setting part 2, and instructs graphic memory 5 to output the address via a buffer 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data output apparatus for outputting image data by setting coordinates of an image to be displayed on a display or the like. The present invention relates to an image data output device that handles data (OSD data) for Screen Display.

[0002]

2. Description of the Related Art In recent years, an image display device such as a display which reproduces an image broadcasted from a broadcast signal and reproduces an image determined by OSD data obtained from the broadcast signal has been developed. This image display device has an image data output device for outputting image data based on OSD data in order to superimpose and reproduce an image obtained from OSD data on a broadcast video. A plurality of images are formed by image data based on the OSD data. When the plurality of images are displayed in an overlapping manner, it is necessary to determine which image data to use for forming the overlapping portion. .

Conventionally, when a plurality of such images are displayed in an overlapping manner, an image data output device as shown in FIG. 8 is used in order to use image data of an image displayed at a higher position in the overlapping portion. ing. Note that the image data output device in FIG. 8 is an image data output device for outputting image data forming each of two images.

The image data output device shown in FIG. 8 has a coordinate judging device 10 for judging whether or not it is a coordinate at which an image is displayed.
1, 102, a priority determining unit 103 for prioritizing image data forming an upper image, and a priority determining unit 10
3. An address selector 104 for determining an address at which the image data determined in Step 3 is stored, and a graphic memory 10 for storing image data for forming two images.
And 5.

In such an image data output device,
It is assumed that image data forming the images A and B displayed as shown in FIG. The image data forming each of the images A and B is continuously stored at different address positions of the graphic memory 105. Note that, among the images A and B, it is assumed that the image A is displayed at a higher position, and the coordinate information of the image A is provided to the coordinate determiner 101, and the coordinate information of the image B is provided to the coordinate determiner 102. .

At this time, read coordinate information indicating a coordinate position at which image data is output to display an image on a display is sequentially provided to the coordinate determiners 101 and 102 in the horizontal and vertical directions. And
The coordinate determiner 101 compares the read coordinate information with the coordinate information of the image A to determine whether the image A is drawn at the position indicated by the read coordinate information. By comparing the read coordinate information with the coordinate information of the image B, it is determined whether or not the image B is drawn at the position indicated by the read coordinate information. This determination result is given to the priority determination unit 103.

[0007] When the position indicated by the read coordinate information is the overlapping portion of the images A and B, the coordinate discriminator 101,
102 outputs a signal indicating that the images A and B are drawn to the priority determination unit 103, respectively. At this time, the priority determination unit 103 controls the address selector 104 so that the image data of the image A to be rendered at the higher level is output from the graphic memory 105. Therefore,
The address selector 104 indicates to the graphic memory 105 the address position where the image data of the image A at the position indicated by the read coordinate information is stored. Then, an image is displayed at the position indicated by the read coordinate information based on the image data of the image A stored at the address specified by the address selector 104.

By using the above-described means so that a plurality of images are combined and displayed on a display, a graphic output device that outputs image data of each image based on OSD data for each coordinate position to be displayed is specially provided. It is presented in Japanese Unexamined Patent Publication No. 2000-163028.

[0009]

However, in the image data output device of FIG. 8 described above, the coordinate position to be displayed on the display is switched for each pixel to determine which image data to output. It is necessary to read from the graphic memory. Therefore, reading cannot be performed continuously for each region, and reading is performed for each pixel. Therefore, the processing speed of each circuit constituting the image data output device is limited, and the load on the processing operation is large. .

[0010] In view of such a problem, an object of the present invention is to provide an image data output device capable of continuously reading image data from a memory in which the image data is stored for each area.

[0011]

According to an aspect of the present invention, there is provided an image data output apparatus comprising: a graphic memory for storing image data relating to a plurality of images in individual memory areas; An address setting unit that indicates the address of the image data stored in the
And an image data output device that outputs image data stored at an address designated by the address setting unit, wherein at least two images to be displayed overlap each other based on coordinates at which the plurality of images are displayed. In addition to having an area setting unit that detects a coordinate area to be displayed and a coordinate area in which each of the images is independently displayed, the address setting unit reads out image data at coordinate positions of a plurality of consecutive pixels, An address for outputting image data to the graphic memory is instructed, and each coordinate area detected by the area setting unit and area information indicating an image displayed at the highest position in each coordinate area are stored in the address setting unit. And the address setting unit reads the coordinate positions of the plurality of consecutive pixels to be read out. In the as image data of each image for each coordinate area are output continuously, characterized by instructing the address for outputting the image data to the graphic memory.

In such an image data output device, after an area setting unit detects a coordinate area in which a plurality of images overlap and a coordinate area displayed in a single image based on the coordinate positional relationship of the plurality of images, these are detected. Are provided to the address setting unit, indicating the coordinate area of the coordinate area and the image displayed at the top in each coordinate area. Then, the coordinate positions of the plurality of continuous pixels are provided to the address setting unit so that the image data is read out for each of the plurality of continuous pixels, and the image to be output is based on the area information provided by the area setting unit. The address of the data is set, and an instruction is given to output to the graphic memory. At this time, since an address can be set for each area, image data of an image displaying each area can be continuously read.

According to a second aspect of the present invention, there is provided an image data output apparatus for storing a graphic memory for storing image data relating to two images in separate memory areas, and an address for designating an address of the image data stored in the graphic memory. And an image data output device that outputs image data stored at an address designated by the address setting unit, wherein an image displayed at the top of the two images is a first image, Is displayed as a second image, and a first coordinate area where the first and second images are displayed overlapping each other, and the first image alone is determined based on coordinates at which the first and second images are displayed. A second coordinate area to be displayed, and an area setting unit that detects a third coordinate area in which the second image is independently displayed; When the setting unit instructs the graphic memory to output an image data output address so as to read image data at a coordinate position of a plurality of consecutive pixels, the first unit together with the area information of the first coordinate area includes The image displayed in the second coordinate area together with the first area information indicating that the image displayed in the coordinate area is the first image and the area information of the second coordinate area is the first image. The third area information indicating that the image displayed in the third coordinate area is the second image together with the indicated second area information and the area information of the third coordinate area is transmitted to the address setting unit. When the first coordinate area or the second coordinate area exists at the coordinate positions of the plurality of consecutive pixels to be read out, the address setting unit may provide an image data of the first image. The image data is output to the graphic memory so that the data is output continuously, and when the third coordinate area exists, the image data of the second image is output continuously. It is characterized by designating an output address.

In such an image data output device, the first coordinate area in which the first and second images overlap with each other in the area setting section based on the coordinate positional relationship between the first and second images, and the first and second images are displayed. After the second and third coordinate areas displayed independently are detected, the first, second and third coordinate areas and the first and second images indicating the images displayed at the top in each coordinate area are detected.
And the third area information are provided to the address setting unit. Then, the coordinate positions of the plurality of continuous pixels are provided to the address setting unit so that the image data is read for each of the plurality of continuous pixels, and the first and second coordinates provided by the area setting unit are provided.
Then, the address of the image data to be output is set based on the third area information, and an instruction to output the image data to the graphic memory is issued. At this time, since an address can be set for each area, image data of an image displaying each area can be continuously read.

Further, in such an image data output device, as described in claim 3, the coordinate positions of the plurality of continuous pixels are coordinate positions of a plurality of continuous pixels in the horizontal direction. The setting unit first detects the overlap of the first and second images in the vertical direction, and sets the first and second images.
Only when the images have a vertical overlap, by detecting the overlap of the first and second images in the horizontal direction,
The first coordinate area may be detected.

According to a fourth aspect of the present invention, there is provided an image data output apparatus.
A graphic memory for storing image data relating to the two images in separate memory areas; and an address setting unit for specifying an address of the image data stored in the graphic memory, and an address specified by the address setting unit. In an image data output device that outputs image data stored in a coordinate position setting unit that sends to the address setting unit coordinate position information for a plurality of horizontally continuous pixels from which image data is read,
Assuming that the upper image of the two images is the first image and the lower image is the second image, the vertical coordinate range in which the first image is drawn and the second image are After detecting a vertically overlapping coordinate area of the first and second images from a vertical coordinate range to be drawn, the horizontal coordinate range in which the first image is drawn and the second image are drawn. By detecting a horizontal coordinate area of the first and second images from the horizontal coordinate range, a first coordinate area drawn in the first image and a second coordinate area drawn in the second image are detected. And an area setting unit that sends the coordinate position information sent from the coordinate position setting unit to the first and second coordinate areas. By comparing , By setting the address for reading the image data from the graphic memory, characterized by instruction to the graphics memory.

In such an image data output device, the area setting unit first detects the overlap of the first and second images in the vertical direction, and then performs the first detection in the horizontal direction.
Then, the detection of the overlap of the second image and the second image is performed. A first coordinate area displayed by the first image and a second coordinate area displayed by the second image are set based on the detection result of the overlap between the first and second images in the vertical and horizontal directions. .

In such an image data output device,
As described in claim 5, a first coordinate area is a coordinate area that is overlapped in the vertical direction of the first and second images, and a coordinate area that is drawn by the first or second image above the first area is a first area. Two regions, a coordinate region drawn by the first or second image below the first region is a third region, and a coordinate region drawn by the first image in the first region is a fourth region. Region, the fourth region in the first region
The coordinate area drawn in the second image on the right side of the area is the fifth area.
When the coordinate area drawn in the second image on the left side of the fourth area in the first area is the sixth area,
The area setting unit checks whether the first area exists, and the second and third areas correspond to the first and second areas, respectively.
Detecting which image of the image is drawn, and when it is confirmed that the first area exists, the fourth,
Each area is set by confirming the existence of each of the fifth and sixth areas.

According to a sixth aspect of the present invention, the address setting unit is configured to determine the second position given from the area setting unit based on coordinate position information sent from the coordinate position setting unit.
A first area determination / determination unit that detects a coordinate position in an area, and sets an address to be instructed in the graphic memory according to the detected coordinate position and an address position of an image in which the second area is drawn; From the coordinate position information sent from the coordinate position setting unit, a coordinate position in the third area provided from the area setting unit is detected, and the detected coordinate position and an image of the image in which the third area is drawn are detected. A second area determining unit for setting an address to be instructed to the graphic memory according to the address position; and a fourth area in the fourth area provided from the area setting unit based on coordinate position information sent from the coordinate position setting unit. A coordinate position is detected, and an address for instructing the graphic memory is specified according to the detected coordinate position and the address position of the first image. A third area determination unit to determine, and a coordinate position in the fifth area provided from the area setting unit, based on coordinate position information sent from the coordinate position setting unit; A fourth area determining unit that sets an address to be instructed in the graphic memory according to an address position of the second image; and a fourth area determining unit that is provided from the area setting unit based on coordinate position information transmitted from the coordinate position setting unit. A fifth area determination unit that detects a coordinate position in the six areas, and sets an address to be instructed to the graphic memory according to the detected coordinate position and the address position of the second image. Each of the first to fifth area determination units sets an address and designates the address of the image data to be read out, so that the image data is continuously output for each address area. It is possible to output the data.

An image data output device according to claim 7 is
The image data output device according to any one of claims 4 to 6, wherein the coordinate position information provided by the coordinate position setting unit includes: a vertical coordinate position of a plurality of continuous pixels from which the image data is read; The information is information indicating the horizontal coordinate positions of two pixels at both ends of the continuous plural pixels.

[0021]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the internal configuration of the image data output device of the present embodiment. FIG.
FIG. 3 is a diagram illustrating a state of image data stored in a graphic memory. FIG. 3 is a block diagram showing an internal configuration of an address setting unit provided in the image data output device of FIG.

The image data output device shown in FIG. 1 receives OSD data and controls the operation of each block.
PU 1, an area setting unit 2 for setting an area in which image data representing a plurality of images are displayed, a coordinate position setting unit 3 for setting a coordinate position for reading image data, and a graphic memory 5. An address setting unit 4 for designating an address of image data to be output by the CPU, a graphic memory 5 in which the image data is stored for each image, and a buffer 6 for adjusting the timing of the output image data.

In this image data output device, the graphic memory 5 stores image data for representing a rectangular image A in an area a, and represents a rectangular image B in an area b, as shown in FIG. Image data is stored.
Note that information indicating the vertical and horizontal sizes of the rectangular images A and B is stored in the address setting unit 4. When two rectangular images such as images A and B overlap as shown in FIG. 4, five regions are formed. These five regions are set as a region p, a region q1, a region q2, a region q3, and a region r as shown in FIG. The region q2 is a region displayed by the image data of the image A, and the regions q1 and q3
Is an area displayed by the image data of the image B.

The coordinate position setting unit 3 sets coordinate positions for reading according to the amount of data stored in the buffer 6, and sends the set coordinate positions to the address setting unit 4 as coordinate information. . That is, a Y coordinate (y) indicating a line to be read, an X coordinate (x1) serving as a read start position and an X coordinate (x2) serving as a read end position for indicating a plurality of coordinate positions at which reading is performed on this line ) Is sent to the address setting unit 4. still,
The X coordinate represents the position in the horizontal direction, and the Y coordinate represents the position in the vertical direction.

Therefore, it is assumed that a display for outputting image data has k × n pixels arranged in one line, and the buffer 6 stores data for n pixels. At this time, first, the image data from the first pixel to the n-th pixel of the first line is read out.
The coordinate information that satisfies (x1, x2, y) = (1, n, 1) is provided to the address setting unit 4. Then, (x1, x2, y) = (n + 1, y) so that the image data from the (n + 1) th pixel to the (2n) th pixel of the first line is read out.
2n, 1) is given to the address setting unit 4.

As described above, coordinate information is sequentially given so that image data is read out every n pixels, and (x1,
When the coordinate information that satisfies (x2, y) = ((k−1) n + 1, kn, 1) is given to the address setting unit 4, next, the image data from the first pixel to the nth pixel of the second line is The coordinate information that satisfies (x1, x2, y) = (1, n, 2) is provided to the address setting unit 4 so as to be read. Less than,
Similarly, coordinate information is sequentially given so that image data is read out every n pixels.

The address setting unit 4 to which such coordinate information is given from the coordinate position setting unit 3 is configured as shown in FIG. The address setting unit 4 shown in FIG. 3 includes: area determination units 41 to 43 for determining the respective areas p to r; AND gates a1 to a5 for sending the determination results of the area determination units 41 to 43 to the address selector 44; An address selector 44 for designating an address from which image data is read from the memory 5 is provided. The region q is a region q1 to q1.
This is an area configured by q3.

The area judging units 41 to 43 have Y direction judging units 45a to 45c, respectively, which are given coordinate information y and judge whether or not they are Y coordinates in the areas p to r. or,
The area determination unit 41 has an X direction determiner 46a that determines the X coordinate in the area p from the coordinate information x1 and x2, and the area determination unit 43 determines the X coordinate in the area r from the coordinate information x1 and x2. And an X-direction determiner 46e. Further, the area determination unit 42 determines the X coordinates in the areas q1 to q3 based on the coordinate information x1 and x2, respectively.
Having. The X-direction determiners 46b and 46d send the determination result and instruct the address selector 44 to select the image data of the image B, and the X-direction determiner 46c sends the determination result. Image A with
The address selector 44 is instructed to select the image data.

The area setting section 2 stores information such as the coordinate positions of the images A and B displayed on the display or the like by the CPU.
1, the presence of regions p, q1, q2, q3, and r is recognized, and the coordinate position of each region and which image data of image A or B is output for each region are determined. Then, information on the coordinate position of the area set by the area setting unit 2 and the image data to be output to the area is given to each of the area determination units 41 to 43 in the address setting unit 4.

The operation of the area setting section 2 will be described with reference to FIGS. Note that the image A is xb> x
a, yb> ya, coordinates (xa, ya), (x
a, yb), (xb, ya), and a rectangular image connecting four points represented by (xb, yb).
When d> xc and yd> yc, the coordinates (xc, y
c), (xc, yd), (xd, yc), (xd, y
This is a rectangular image connecting four points represented by d).

First, the regions p to r are determined from the coordinate positions of the images A and B displayed on the display and the like. The determination of the areas pr will be described with reference to FIG. As shown in FIG. 5, when ya <yc, yb ≦ yc, yc <yb <yd, yb = yd, yd
<Yb, when ya = yc or yc
When <ya <yd, yc <yb <y, respectively.
The three cases of d, yb = yd and yd <yb,
It is possible that d ≦ ya. Therefore, it is necessary to consider 11 cases separately. Note that the coordinate values in the start coordinate column and the end coordinate column in FIG. 5 respectively represent the minimum value and the maximum value of the Y coordinate in that region. Represents whether or not exists.

(1) ya <yc, yb ≦ yc At this time, as shown in FIG. 5, the images A and B do not overlap, and the region q does not exist. Therefore, the region p belongs to the whole image A and the region r belongs to the whole image B. The start coordinate and the end coordinate of the region p on the Y coordinate are ya and yb, respectively, and the start coordinate and the end coordinate of the region r on the Y coordinate are yc and yd, respectively.
Becomes Therefore, the area setting unit 2 sets the Y direction
, The start coordinate ya and the end coordinate yb of the area p are represented by Y
The start coordinate yc and the end coordinate yd of the region r are sent to the direction determiner 45c.

Further, at this time, the start coordinate and the end coordinate of the area p at the X coordinate are xa and xb, respectively.
The start coordinate and the end coordinate of the region r at the X coordinate are xc and xd, respectively. Therefore, the area setting unit 2 sets X
The start coordinates xa and end coordinates xb of the area p are sent to the direction determiner 46a, and the start coordinates xc and end coordinates xd of the area r are sent to the X-direction determiner 46e. Further, information indicating that the image data of the image A is used is provided to the X-direction determiner 46a, and information indicating that the image data of the image B is used is provided to the X-direction determiner 46e. still,
At this time, since the region q does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 42.

(2) ya <yc, yc <yb <yd At this time, as shown in FIG.
yb overlap. Therefore, while the region q exists, the region p belongs to a part of the image A, and the region r
Belongs to a part of. Then, the start coordinate and the end coordinate in the Y coordinate of the area p are ya and yc-1, respectively.
The start coordinates and end coordinates of the region q on the Y coordinate are yc and yb, respectively, and the start coordinates and end coordinates of the region r on the Y coordinate are yb + 1 and yd, respectively. Therefore, the area setting unit 2 sets the start coordinate ya and the end coordinate yc-1 of the area p to the Y direction determiner 45a by Y
The start coordinate yc and the end coordinate yb of the area q are sent to the direction determiner 45b, and the start coordinate yb + 1 and the end coordinate yd of the area r are sent to the Y direction determiner 45c.

Further, at this time, the start coordinate and the end coordinate of the area p on the X coordinate are xa and xb, respectively.
The start coordinate and the end coordinate of the region r at the X coordinate are xc and xd, respectively. Therefore, the area setting unit 2 sets X
The start coordinates xa and end coordinates xb of the area p are sent to the direction determiner 46a, and the start coordinates xc and end coordinates xd of the area r are sent to the X-direction determiner 46e. Further, information indicating that the image data of the image A is used is provided to the X-direction determiner 46a, and information indicating that the image data of the image B is used is provided to the X-direction determiner 46e. still,
At this time, the start coordinates and the end coordinates in the X coordinate of the region q and the information indicating the image data to be used are also provided to the region determination unit 42. It will be described later.

(3) ya <yc, yb = yd At this time, as shown in FIG.
It overlaps between yb (= yd). Therefore, the region q exists and the region p belongs to a part of the image A.
At this time, since yb = yd, the region r does not exist. Then, the start coordinate and the end coordinate in the Y coordinate of the area p are ya and yc-1, respectively, and the start coordinate and the end coordinate in the Y coordinate of the area q are yc and yc, respectively.
yb. Therefore, the area setting unit 2 sets the Y direction
5a, the start coordinate ya and end coordinate yc of the area p
1 with respect to the Y direction determiner 45b,
c and the end coordinate yb are sent out.

Further, at this time, the start coordinates and the end coordinates in the X coordinate of the area p are xa and xb, respectively. Therefore, the area setting unit 2 sends the start coordinates xa and the end coordinates xb of the area p to the X direction determiner 46a. or,
Information indicating that the image data of the image A is to be used is provided to the X direction determiner 46a. At this time, the start coordinates and the end coordinates in the X coordinate of the area q and the information indicating the image data to be used are also provided to the area determination unit 42, but they are different depending on the overlapping state of the images A and B.
This will be described later. Further, since the region r does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 43.

(4) ya <yc, yd <yb At this time, as shown in FIG.
yd overlap. Therefore, the region q exists, and the regions p and r belong to a part of the image A, respectively.
Then, the start coordinate and the end coordinate in the Y coordinate of the area p are ya and yc-1, respectively, and the start coordinate and the end coordinate in the Y coordinate of the area q are yc and yd, respectively. The start coordinates and the end coordinates are yd + 1 and yb, respectively. Therefore, the area setting unit 2 sets the start coordinates ya and the end coordinates yc-1 of the area p to the Y direction determiner 45a, the start coordinates yc and the end coordinates yd of the area q to the Y direction determiner 45b, The start coordinate yd + 1 and the end coordinate yb of the region r are sent to the Y direction determiner 45c.

Further, at this time, the start coordinates and the end coordinates in the X coordinate of the area p are xa and xb, respectively.
The start coordinates and the end coordinates of the region r at the X coordinate are also xa and xb, respectively. Therefore, the area setting unit 2 sets X
For each of the direction determiners 46a and 46e, the region p,
r The start coordinate xa and the end coordinate xb are transmitted. Further, information indicating that the image data of the image A is used is given to each of the X-direction determiners 46a and 46e. At this time, the start coordinates and the end coordinates in the X coordinate of the region q and the information indicating the image data to be used are also provided to the region determination unit 42, but they are different depending on the overlapping state of the images A and B. Will be described later.

(5) ya = yc, yc <yb <yd At this time, as shown in FIG.
(= Yc) to yb overlap. Therefore, the region q exists and the region r belongs to a part of the image B.
At this time, since ya = yc, the region p does not exist. Then, the start coordinate and the end coordinate in the Y coordinate of the region q are ya and yb, respectively, and the start coordinate and the end coordinate in the Y coordinate of the region r are yb + 1,
yd. Therefore, the area setting unit 2 sets the Y direction
5b, start coordinate ya and end coordinate yb of region q
With respect to the Y direction determiner 45c,
+1 and the end coordinate yd are sent.

Further, at this time, the start coordinate and the end coordinate in the X coordinate of the area r are xc and xd, respectively. Therefore, the area setting unit 2 sends the start coordinates xc and the end coordinates xd of the area r to the X direction determiner 46e. or,
Information indicating that the image data of the image B is used is given to the X-direction determiner 46e. At this time, the start coordinates and the end coordinates in the X coordinate of the area q and the information indicating the image data to be used are also provided to the area determination unit 42, but they are different depending on the overlapping state of the images A and B.
This will be described later. Further, since the region p does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 41.

(6) ya = yc, yb = yd At this time, as shown in FIG.
(= Yc) to yb (= yd). Therefore, only the region q exists and the regions p and r do not exist. Then, the start coordinate and the end coordinate in the Y coordinate of the area q are ya and yb, respectively. Therefore, the area setting unit 2 sends the start coordinates ya and the end coordinates yb of the area q to the Y direction determiner 45b. Furthermore, at this time,
The start coordinates and the end coordinates in the X coordinate of the area q and the information indicating the image data to be used are determined by the area determination unit 42.
However, since it differs depending on the overlapping state of the images A and B, this will be described later. Further, since the regions p and r do not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to each of the region determination units 41 and 43.

(7) ya = yc, yd <yb At this time, as shown in FIG.
(= Yc) to yd overlap. Therefore, the region q exists and the region r belongs to a part of the image A.
At this time, since ya = yc, the region p does not exist. Then, the start coordinate and the end coordinate in the Y coordinate of the area q are ya and yd, respectively, and the start coordinate and the end coordinate in the Y coordinate of the area r are yd + 1,
yb. Therefore, the area setting unit 2 sets the Y direction
5b, start coordinate ya and end coordinate yd of region q
With respect to the Y direction determiner 45c,
+1 and the end coordinate yb are sent out.

Further, at this time, the start coordinate and the end coordinate in the X coordinate of the area r are xa and xb, respectively. Therefore, the area setting unit 2 sends the start coordinate xa and the end coordinate xb of the area r to the X direction determiner 46e. or,
Information indicating that the image data of the image A is to be used is given to the X-direction determiner 46e. At this time, the start coordinates and the end coordinates in the X coordinate of the area q and the information indicating the image data to be used are also provided to the area determination unit 42, but they are different depending on the overlapping state of the images A and B.
This will be described later. Further, since the region p does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 41.

(8) yc <ya <yd, yc <yb <y
d At this time, as shown in FIG. 5, the images A and B are
yb overlap. Therefore, the region q exists, and the regions p and r belong to a part of the image B, respectively.
The start coordinate and end coordinate of the region p on the Y coordinate are yc and ya-1, respectively. The start coordinate and end coordinate of the region q on the Y coordinate are ya and yb, respectively. The start coordinates and the end coordinates are yb + 1 and yd, respectively. Therefore, the area setting unit 2 sets the start coordinate yc and the end coordinate ya-1 of the area p to the Y direction determiner 45a, the start coordinate ya and the end coordinate yb of the area q to the Y direction determiner 45b, The start coordinate yb + 1 and the end coordinate yd of the region r are sent to the Y direction determiner 45c.

Further, at this time, the start coordinate and the end coordinate of the area p at the X coordinate become xc and xd, respectively.
In addition, the start coordinate and the end coordinate in the X coordinate of the region r are also xc and xd, respectively. Therefore, the area setting unit 2 sets X
For each of the direction determiners 46a and 46e, the region p,
The start coordinate xc and the end coordinate xd of each r are transmitted. Further, information indicating that the image data of the image B is used is given to each of the X-direction determiners 46a and 46e. At this time, the start coordinates and the end coordinates in the X coordinate of the region q and the information indicating the image data to be used are also provided to the region determination unit 42, but they are different depending on the overlapping state of the images A and B. Will be described later.

(9) yc <ya <yd, yb = yd At this time, as shown in FIG.
It overlaps between yb (= yd). Therefore, the region q exists and the region p belongs to a part of the image B.
At this time, since yb = yd, the region r does not exist. Then, the start coordinate and the end coordinate in the Y coordinate of the area p are yc and ya-1, respectively, and the start coordinate and the end coordinate in the Y coordinate of the area q are ya,
yb. Therefore, the area setting unit 2 sets the Y direction
5a, the start coordinate yc and the end coordinate ya-
1 with respect to the Y direction determiner 45b,
a and the end coordinate yb are sent out.

Further, at this time, the start coordinates and the end coordinates in the X coordinate of the area p are xc and xd, respectively. Therefore, the area setting unit 2 sends the start coordinates xc and the end coordinates xd of the area p to the X-direction determiner 46a. or,
Information indicating that the image data of the image B is used is provided to the X-direction determiner 46a. At this time, the start coordinates and the end coordinates in the X coordinate of the area q and the information indicating the image data to be used are also provided to the area determination unit 42, but they are different depending on the overlapping state of the images A and B.
This will be described later. Further, since the region r does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 43.

(10) yc <ya <yd, yd <yb At this time, as shown in FIG.
yd overlap. Therefore, the region q exists, the region p belongs to a part of the image B, and the region r belongs to the image A.
Belongs to a part of. Then, the start coordinate and the end coordinate in the Y coordinate of the area p are yc and ya-1, respectively.
The start coordinates and end coordinates of the region q on the Y coordinate are ya and yd, respectively, and the start coordinates and end coordinates of the region r on the Y coordinate are yd + 1 and yb, respectively. Therefore, the area setting unit 2 sets the start coordinate yc and the end coordinate ya-1 of the area p to the Y direction
The start coordinate ya and the end coordinate yd of the area q are sent to the direction determiner 45b, and the start coordinate yd + 1 and the end coordinate yb of the area r are sent to the Y direction determiner 45c.

Further, at this time, the start coordinate and the end coordinate of the area p at the X coordinate are xc and xd, respectively.
The start coordinate and the end coordinate of the region r at the X coordinate are xa and xb, respectively. Therefore, the area setting unit 2 sets X
The start coordinate xc and the end coordinate xd of the area p are sent to the direction determiner 46a, and the start coordinate xa and the end coordinate xb of the area r are sent to the X direction determiner 46e. Further, information indicating that the image data of the image B is used is provided to the X direction determiner 46a, and information indicating that the image data of the image A is used is provided to the X direction determiner 46e. still,
At this time, the start coordinates and the end coordinates in the X coordinate of the region q and the information indicating the image data to be used are also provided to the region determination unit 42, but the information differs depending on the overlapping state of the images A and B. It will be described later.

(11) yd ≦ ya At this time, as shown in FIG. 5, the images A and B do not overlap, and the region q does not exist. Therefore, the region p belongs to the whole image B and the region r belongs to the whole image A. Then, the start coordinates and the end coordinates in the Y coordinate of the area p are yc and yd, respectively, and the start coordinates and the end coordinate in the Y coordinate of the area r are ya and yb, respectively. Therefore, the area setting unit 2 sets the Y direction
, The start coordinate yc and the end coordinate yd of the area p are represented by Y
The start coordinates ya and the end coordinates yb of the region r are sent to the direction determiner 45c.

Further, at this time, the start coordinate and the end coordinate of the area p at the X coordinate are xc and xd, respectively.
The start coordinate and the end coordinate of the region r at the X coordinate are xa and xb, respectively. Therefore, the area setting unit 2 sets X
The start coordinate xc and the end coordinate xd of the area p are sent to the direction determiner 46a, and the start coordinate xa and the end coordinate xb of the area r are sent to the X direction determiner 46e. Further, information indicating that the image data of the image B is used is provided to the X direction determiner 46a, and information indicating that the image data of the image A is used is provided to the X direction determiner 46e. still,
At this time, since the region q does not exist, the start coordinates and the end coordinates in the X coordinate and the Y coordinate are not sent to the region determination unit 42.

As described above, when the regions p to r are determined and the existence of the region q is confirmed, the regions q1 to q3 are determined next. The determination of the regions q1 to q3 will be described with reference to FIG. As shown in FIG.
When xa <xc, xb ≦ xc, xc <xb <x
When three cases of d and xd ≦ xb satisfy xc <xa <xd, two cases of xc <xb <xd and xd ≦ xb may further satisfy xd ≦ xa. Therefore, it is necessary to divide it into six cases. Note that the coordinate values in the start coordinate column and the end coordinate column in FIG. 6 respectively represent the minimum value and the maximum value of the X coordinate in the region, and “x” in the region belonging column indicates that the region does not exist. Represent.

(1) xa <xc, xb ≦ xc At this time, as shown in FIG. 6, the images A and B do not overlap. Therefore, the region q1 does not exist, the region q2 belongs to the whole image A, and the region q3 can belong to the whole image B. Then, the start coordinate and the end coordinate in the X coordinate of the area q2 are xa,
xb, and the start coordinate and the end coordinate of the area q3 at the X coordinate are xc and xd, respectively. Therefore, the area setting unit 2 sends the start coordinate xa and the end coordinate xb of the area q2 to the X direction determiner 46c, and sends the start coordinate xc and the end coordinate xd of the area q3 to the X direction determiner 46d. . At this time, since the region q1 does not exist, the start coordinates and the end coordinates of the X coordinates are not sent to the region determination unit 46b.

(2) xa <xc, xc <xb <xd At this time, the images A and B overlap as shown in FIG.
Therefore, the region q1 does not exist, the region q2 belongs to the entire image A, and the region q3 belongs to a part of the image B. Then, the start coordinates and the end coordinates in the X coordinate of the area q2 are xa and xb, respectively, and the start coordinates and the end coordinates in the X coordinate of the area q3 are xb + 1 and xd, respectively. Therefore, the area setting unit 2 sends the start coordinate xa and the end coordinate xb of the area q2 to the X direction determiner 46c, and the start coordinate xb + 1 and the end coordinate xd of the area q3 to the X direction determiner 46d. . At this time, since the region q1 does not exist, the start coordinates and the end coordinates of the X coordinates are not sent to the region determination unit 46b.

(3) xa <xc, xd ≦ xb At this time, as shown in FIG. 6, the images A and B overlap each other.
Therefore, the region q1 and the region q3 do not exist, and the region q2 can belong to the entire image A. Then, the start coordinates and the end coordinates in the X coordinate of the area q2 are xa and xb, respectively. Therefore, the area setting unit 2
The start coordinate xa and the end coordinate xb of the area q2 are sent to the X direction determiner 46c. At this time, the regions q1,
Since q3 does not exist, the start coordinates and the end coordinates in the X coordinate are not sent to the area determination units 46b and 46d.

(4) xc <xa <xd, xc <xb <x
d At this time, as shown in FIG. 6, the images A and B overlap.
Therefore, the regions q1 and q3 belong to a part of the image B, and the region q2 belongs to the entire image A. The start and end coordinates of the region q1 at the X coordinate are xc and xa-1, and the start and end coordinates of the region q2 at the X coordinate are xa and xa, respectively.
xb, and the start coordinate and end coordinate of the area q3 at the X coordinate are xb + 1 and xd, respectively. Therefore,
The region setting unit 2 transmits the region q1 to the X-direction determiner 46b.
, The start coordinate xa and the end coordinate xb of the area q2 for the X-direction determiner 46c, and the start coordinate xb + 1 and the end coordinate xd of the area q3 for the X-direction determiner 46d. Is transmitted.

(5) xc <xa <xd, xd ≦ xb At this time, the images A and B overlap as shown in FIG.
Therefore, the region q3 does not exist, the region q1 belongs to a part of the image B, and the region q2 belongs to the entire image A. Then, the start coordinate and the end coordinate in the X coordinate of the area q1 are xc and xa-1, and
The start coordinates and the end coordinates in the X coordinate of the area q2 are xa and xb, respectively. Therefore, the area setting unit 2
The start coordinate xc and the end coordinate xa-1 of the area q1 are sent to the X direction determiner 46b, and the start coordinate xa and the end coordinate xb of the area q2 are sent to the X direction determiner 46c. At this time, since the region q3 does not exist, the start coordinates and the end coordinates of the X coordinates are not sent to the region determination unit 46b.

(6) xd ≦ xa At this time, as shown in FIG. 6, the images A and B overlap each other.
Therefore, the region q3 does not exist, the region q1 belongs to the entire image B, and the region q2 belongs to the entire image A. The start and end coordinates of the region q1 at the X coordinate are xc and xd, and the start and end coordinates of the region q2 at the X coordinate are xa and xb, respectively. Therefore, the area setting unit 2 sends the start coordinate xc and the end coordinate xd of the area q1 to the X direction determiner 46b, and sends the start coordinate xa and the end coordinate xb of the area q2 to the X direction determiner 46c. . At this time, since the region q3 does not exist, the start coordinates and the end coordinates of the X coordinates are not sent to the region determination unit 46b.

As described above, the area setting section 2 sets each area based on the information sent from the CPU 1 and sends the coordinate information of each set area and the information on the image data used for each area to the address. Area determiners 41 to 4 in setting section 4
3 The information about each area is obtained by the area determination unit 4.
The operation of the image data output device when given to 1 to 43 will be described below with reference to the example of FIG.

Now, as shown in FIG. 7, image data is output from the image data output device so that images A and B are displayed on an array of m pixels in the vertical direction and 2n pixels in the horizontal direction. Shall be performed. Further, the values of the coordinates of the above-mentioned points constituting the images A and B are 1 <xc <xa <n
<Xb <xd <2n, 1 <ya <yc <yd <yb <m
The following describes an example of the case. Further, it is assumed that data for n pixels is stored in the buffer 6.

First, as described above, the coordinate position setting unit 3
Thus, (x1, x2, y) = (x1, x2, y) is set such that the image data from the first pixel to the n-th pixel of the first line is read.
The coordinate information of (1, n, 1) is provided to the address setting unit 4. Now, if 1 <ya, up to the ya-1 line,
Since no image is displayed, the Y direction determiners 45a to 45c
Output to low level and AND gates a1 to a
5 does not operate, and data from the X-direction determiners 46 a to 46 e is not sent to the address selector 44.

Incidentally, regardless of the position of the line to be read, the coordinate information (x1, x2) = (1,
n), the X-direction determiners 46a and 46e read the image data of the image A and provide information about the start coordinate xa and the end coordinate n in the X-coordinate to the X-direction determiner 46a.
b indicates the readout of the image data of the image B, the information on the start coordinate xc and the end coordinate xa-1 at the X coordinate, and the X direction determiner 46c reads the image data of the image A and the start coordinate xa and the end coordinate n at the X coordinate. Output information about

Next, as described above, the coordinate position setting unit 3
(X1, x2, y) so that the image data from the (n + 1) th pixel to the (2n) th pixel of the first line is read out.
= (N + 1, 2n, 1) is given to the address setting unit 4. Since 1 <ya and no image is displayed until the (ya-1) th line, the Y-direction determiner 45a
45c become low level, the AND gates a1 to a5 do not operate, and the data from the X direction determiners 46a to 46e are not sent to the address selector 44.

Incidentally, regardless of the position of the line to be read, coordinate information (x1, x2) = (n +
, 2n), the X direction determiners 46a, 46
“e” indicates the readout of the image data of the image A and information on the start coordinate n + 1 and the end coordinate xb at the X coordinate. The X-direction determiner 46d reads the image data of the image B, and sets the start coordinate xb + 1 and the end coordinate xd in the X coordinate.
Output information about

As described above, the coordinate information (1, n, 1) to
While (n + 1, 2n, ya-1) is supplied from the coordinate position setting unit 3, the AND gates a1 to a5 do not operate, and the data from the X direction determiners 46a to 46e is not sent to the address selector 44. Then, the coordinate information (1, n, y
When a) is given from the coordinate position setting unit 3, the output of the Y-direction determiner 45a goes high, so that the image data of the image A output from the X-direction determiner 46a is read and the start coordinate xa on the X coordinate is obtained. And information about the end coordinate n is sent to the address selector 44 via the AND gate a1. Therefore, the area a in the graphic memory 5
Are successively read out and transmitted to the buffer 6 for (n-xa + 1) image data.

At this time, since ya <yc, yc−
Up to the first line, the region p is displayed, so that the outputs from the Y-direction determiners 45b and 45c become low level, the AND gates a2 to a5 do not operate, and the X-direction determiners 46b to 46e do not operate. Is not sent to the address selector 44.

Thereafter, the coordinate information (n + 1, 2n, ya)
Is given by the coordinate position setting unit 3,
Since the output of 5a is at a high level, the X direction
The readout of the image data of the image A output from a and information on the start coordinate n + 1 and the end coordinate xb in the X coordinate are sent to the address selector 44 via the AND gate a1. Therefore, the area a in the graphic memory 5
Are successively read out and transmitted to the buffer 6 for xb-n pieces of image data stored in the buffer 6.

At this time, since ya <yc, yc−
Up to the first line, the region p is displayed, so that the outputs from the Y-direction determiners 45b and 45c become low level, the AND gates a2 to a5 do not operate, and the X-direction determiners 46b to 46e do not operate. Is not sent to the address selector 44. Thus, the coordinate information (1, n,
While (ya) to (n + 1, 2n, yc-1) are given from the coordinate position setting unit 3, only the AND gate a1 operates and the image data representing the image A is displayed in the buffer 6 in order to display the area p. After being sequentially transmitted, the timing is adjusted and output.

When the coordinate information (1, n, yc) is given from the coordinate position setting unit 3, the output of the Y-direction determiner 45b becomes high level, so that the image B output from the X-direction determiner 46b is output. And the readout of the image data of the image A output from the X-direction determiner 46c via the AND gate a2 and information on the start coordinate xc and the end coordinate xa-1 in the X coordinate. Information about the start coordinates xa and the end coordinates n is sent to the address selector 44 via the AND gate a3. Since n <xd, no data is output from the X-direction determiner 46d.

Therefore, the area b in the graphic memory 5
Xa-xc image data stored in the area a in the graphic memory 5, and nx the image data stored in the area a in the graphic memory 5.
a + 1 data are continuously read out from the buffer 6
Sent to At this time, since yc-1 <yc <yd + 1, the area q is displayed up to the yd-th line, so that the outputs from the Y-direction determiners 45a and 45c become low level, and the AND gates a1 and 45c are output. a5 does not operate, and data from the X direction determiners 46a and 46e is not sent to the address selector 44.

Then, the coordinate information (n + 1, 2n, yc)
Is given by the coordinate position setting unit 3,
5b goes high, so that the X-direction determiner 46
The readout of the image data of the image A output from c and the information on the start coordinate n + 1 and the end coordinate xb in the X coordinate are transmitted via the AND gate a3 and the X direction determiner 46.
The readout of the image data of the image B output from d and the information on the start coordinate xb + 1 and the end coordinate xd in the X coordinate are sent to the address selector 4 via the AND gate a4.
4 is sent. Since xc <n + 1, no data is output from the X-direction determiner 46b.

Therefore, the area a in the graphic memory 5
Xb-n image data stored in the area b in the graphic memory 5 and xd-x image data stored in the area b in the graphic memory 5.
The “b” data are continuously read out and sent to the buffer 6. At this time, since yc-1 <yc <yd + 1, the area q is displayed up to the yd-th line, so that the outputs from the Y-direction determiners 45a and 45c become low level, and the AND gates a1 and 45c are output. a5 does not work,
Data from the X direction determiners 46a and 46e are not sent to the address selector 44.

As described above, the coordinate information (1, n, yc) to
While (n + 1, 2n, yd) is given from the coordinate position setting unit 3, the AND gates a2 to a4 operate and the image B
In order for the image data representing to display the regions q1 and q3,
Further, since the image data representing the image A displays the region q2, the image data is q1, q2, q3 for each line.
, And then the timing is adjusted and output.

Then, when the coordinate information (1, n, yd + 1) is given from the coordinate position setting unit 3, the Y direction determination unit 45
c becomes a high level, the X-direction determiner 46e
The readout of the image data of the output image A and the information on the start coordinate xa and the end coordinate n in the X coordinate are sent to the address selector 44 via the AND gate a5. Therefore, the image data stored in the area a in the graphic memory 5 is continuously read out for each of n−xa + 1 pieces and sent to the buffer 6.

At this time, since yd + 1 <yb + 1, the region r is displayed up to the yb-th line, so that the outputs from the Y-direction determiners 45a and 45b become low level, and the AND gates a1 to a4 Does not work, X
Data from the direction determiners 46a to 46d is not sent to the address selector 44.

Then, the coordinate information (n + 1, 2n, yd +
When 1) is given from the coordinate position setting unit 3, the output of the Y direction determiner 45c becomes high level, so that the image data of the image A output from the X direction determiner 46e is read and the start coordinate n + 1 on the X coordinate. And information about the end coordinate xb is sent to the address selector 44 via the AND gate a5. Therefore, the image data stored in the area “a” in the graphic memory 5 is continuously read out by n−xb pieces and sent to the buffer 6.

At this time, since yd + 1 <yb + 1, the region r is displayed up to the yb-th line, so that the outputs from the Y-direction determiners 45a and 45b become low level, and the AND gates a1 to a4 Does not work, X
Data from the direction determiners 46a to 46d is not sent to the address selector 44. Thus, the coordinate information (1,
While (n, yd + 1) to (n + 1, 2n, yb) are given from the coordinate position setting unit 3, only the AND gate a5 operates and the image data representing the image A is stored in the buffer 6 in order to display the region r. After being sequentially transmitted, the timing is adjusted and output.

When the coordinate information (1, n, yb + 1) is provided from the coordinate position setting unit 3, yb <yb + 1
Then, since no image is displayed after the yb + 1 line, the outputs from the Y direction determiners 45a to 45c become low level, the AND gates a1 to a5 do not operate, and the data from the X direction determiners 46a to 46e are It is not sent to the address selector 44.

Next, the coordinate information (n + 1, 2n, yb)
Similarly, when +1) is given from the coordinate position setting unit 3,
The outputs from the Y direction determiners 45a to 45c become low level, the AND gates a1 to a5 do not operate, and the data from the X direction determiners 46a to 46e are transferred to the address selector 44.
Not sent to Thus, the coordinate information (1, n, yb
While (+1) to (n + 1, 2n, m) are given from the coordinate position setting unit 3, the AND gates a1 to a5 do not operate, and X
Data from the direction determiners 46a to 46e is not sent to the address selector 44.

As described above, by operating each block, the image data whose timing is adjusted by the buffer 6 is output, and an image as shown in FIG. 7 is displayed on the display based on the image data. . still,
7, the address setting unit 4 operates based on the information on the areas p, q1, q2, q3, and r set by the area setting unit 2, and the continuous data stored in the graphic memory 5 is displayed. The image data can be read out and output through the buffer 6.

[0082]

According to the present invention, the coordinate area can be set according to the state of each displayed image, and the image displayed for each set coordinate area can be recognized. When the image data of a plurality of continuous pixels is read, the address of the image data to be read is set based on the set coordinate area. Therefore, the image data is continuously stored in the graphic memory according to the coordinate area. Image data of each image can be read. Therefore, as in the past, 1
Instead of determining which image data needs to be read for each pixel and outputting the image data, image data can be read continuously for a plurality of pixels. Then, the processing speed can be improved, and the load on each circuit involved in the processing operation at the time of reading can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of an image data output device according to the present invention.

FIG. 2 is a diagram showing a state of image data stored in a graphic memory.

FIG. 3 is a diagram showing an internal configuration of an address setting unit.

FIG. 4 is a diagram showing a state of an image.

FIG. 5 is a diagram showing an operation of an area setting unit.

FIG. 6 is a diagram showing an operation of an area setting unit.

FIG. 7 is a diagram showing a state of a displayed image.

FIG. 8 is a diagram showing an internal configuration of a conventional image data output device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 Area setting part 3 Coordinate position setting part 4 Address setting part 5 Graphic memory 6 Buffer

Claims (7)

[Claims] A graphic memory for storing image data relating to a plurality of images in individual memory areas; and an address setting unit for designating an address of the image data stored in the graphic memory. An image data output device that outputs image data stored at an address designated by the following: a coordinate area in which at least two images to be displayed are overlapped and displayed, based on coordinates at which the plurality of images are displayed; An image processing apparatus has an area setting unit that detects a coordinate area in which an image is displayed alone, and the address setting unit reads image data at coordinate positions of a plurality of continuous pixels so that image data is read from the graphic memory. Indicates an address to output, and is detected by the area setting unit. Area information indicating an image displayed at the highest position in each coordinate area and each coordinate area is given to the address setting unit, and the address setting unit reads the coordinate positions of the plurality of consecutive pixels to be read out. An image data output device for designating an address for outputting image data to the graphic memory so that image data of each image is continuously output for each of the coordinate areas. 2. A graphic memory for storing image data relating to two images in separate memory areas; and an address setting unit for designating an address of the image data stored in the graphic memory. An image data output device that outputs image data stored at an address designated by the following: an image displayed higher in the two images as a first image, an image displayed lower in a second image, A first coordinate area in which the first and second images are displayed overlapping each other, a second coordinate area in which the first image is displayed alone, and the second coordinate area based on coordinates at which the first and second images are displayed. An address setting unit configured to detect a third coordinate area in which an image is independently displayed; When an address for outputting image data is instructed to the graphic memory so as to read image data in the first coordinate area, an image displayed in the first coordinate area together with area information of the first coordinate area is a first image. The first shown to be
The area information, the second area information indicating that the image displayed in the second coordinate area is the first image together with the area information of the second coordinate area, and the second information together with the area information of the third coordinate area. Third area information indicating that the image displayed in the three coordinate areas is the second image is provided to the address setting unit, and the address setting unit reads the coordinate position of the continuous plurality of pixels. In the above, when the first coordinate area or the second coordinate area exists, the image data of the first image is continuously output, and when the third coordinate area exists, the An image data output device for designating an address for outputting image data to the graphic memory so that image data of a second image is continuously output. 3. A coordinate position for a plurality of continuous pixels,
A coordinate position for a plurality of pixels that are continuous in the horizontal direction; and the area setting unit firstly sets the first and second pixels in the vertical direction.
Only when the first and second images have an overlap in the vertical direction by detecting the overlap of the images, the first
The image data output apparatus according to claim 1, wherein the first coordinate area is detected by detecting an overlap between the first image and the second image. 4. An image processing apparatus comprising: a graphic memory for storing image data related to two images in separate memory areas; and an address setting unit for designating an address of the image data stored in the graphic memory. In the image data output device for outputting the image data stored at the address designated by the above, the coordinate position setting for transmitting the coordinate position information of a plurality of horizontally continuous pixels from which the image data is read out to the address setting unit. And a vertical coordinate range in which the first image is drawn, where a first image is displayed as a first image and a second image is displayed as a lower image of the two images. After detecting the overlapping coordinate area in the vertical direction of the first and second images from the vertical coordinate range in which the two images are drawn, The first and second images are detected from the horizontal coordinate range in which the first image is drawn and the horizontal coordinate range in which the second image is drawn by detecting a coordinate area overlapping the first and second images in the horizontal direction. An area setting unit that sets a first coordinate area drawn by an image and a second coordinate area drawn by the second image, and sends the coordinate setting unit to the address setting unit; By comparing the coordinate position information sent from the position setting unit with the first and second coordinate areas, an address for reading image data from the graphic memory is set, and an instruction is given to the graphic memory. Characteristic image data output device. 5. A first area is a coordinate area where the first and second images overlap in a vertical direction, a second area is a coordinate area drawn by the first or second image above the first area, and A coordinate area drawn by the first or second image below the first area is a third area, and a coordinate area drawn by the first image in the first area is a fourth area. In one area, a coordinate area drawn in the second image on the right side of the fourth area is a fifth area, and in the first area, a coordinate area drawn in the second image on the left side of the fourth area is a sixth area. When the area is set, the area setting unit checks whether the first area exists, and the second and third areas correspond to the first and second areas, respectively.
In which image of the image is drawn, and when it is confirmed that the first region exists, the fourth,
The image data output device according to claim 4, wherein the presence or absence of each of the fifth and sixth regions is confirmed. 6. The method according to claim 1, wherein the address setting unit is configured to:
A coordinate position in the second area provided from the area setting unit is detected, and an address instructing the graphic memory in accordance with the detected coordinate position and an address position of an image in which the second area is drawn. First to set
An area determination unit, and from coordinate position information sent from the coordinate position setting unit,
A coordinate position in the third area provided from the area setting unit is detected, and an address instructing the graphic memory is specified according to the detected coordinate position and an address position of an image in which the third area is drawn. The second to set
An area determination unit, and from coordinate position information sent from the coordinate position setting unit,
A third area for detecting a coordinate position in the fourth area provided from the area setting unit and setting an address to be instructed to the graphic memory according to the detected coordinate position and an address position of the first image; From the coordinate position information sent from the determination unit and the coordinate position setting unit,
A fourth area for detecting a coordinate position in the fifth area provided from the area setting unit and setting an address to be instructed in the graphic memory according to the detected coordinate position and an address position of the second image; From the coordinate position information sent from the determination unit and the coordinate position setting unit,
A fifth area for detecting a coordinate position in the sixth area provided from the area setting unit and setting an address to be instructed to the graphic memory according to the detected coordinate position and an address position of the second image; The image data output device according to claim 5, comprising: a determination unit. 7. The coordinate position information provided by the coordinate position setting unit includes: a vertical coordinate position of a plurality of continuous pixels from which the image data is read; and a horizontal coordinate position of two pixels at both ends of the continuous plurality of pixels. 7. The image data output apparatus according to claim 4, wherein the information is information representing a coordinate position.