JPS61123369A - Picture change device - Google Patents

Abstract

PURPOSE:To enable to generate a new picture from the original picture on the basis of coordinates value of the original picture and coordinates value of a new picture by establishing a change address generating device, original picture memory, original read address control device and a new picture memory. CONSTITUTION:Change address generating device 11 outputs value of dot coordinates 13 on the plane of original picture corresponding to picture element coordinates value 12 on the plane of a new picture on the basis of the given three dimensional geometrical structure representation system and coefficient. The original read address control 14 reads picture data designating address in dot coordinates 13 on the plane of the original picture from the original picture written in the original picture memory 16 by the original write address control device 15. New write address control unit 17 writes the read picture data in the new picture memory 18 designating the address in coordinates value 12. Next, read address control device 19 reads the picture data one after another from the new picture memory 18 to generate a new image. Thus, a new picture can be produced from the original picture on the basis of coordinates value of the original picture and coordinates value of new picture by setting the device 11, memory 16, 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image conversion device that can be used for image shape conversion in image special effects devices and the like.

BACKGROUND OF THE INVENTION In recent years, advances in image processing technology have enabled various special effects, and many special effect devices have been announced. In these special effects devices, conversion operations are performed not only on image data but also on addresses.

A conventional image conversion device will be described below with reference to the drawings. FIG. 3 is a block diagram of a conventional image conversion device.

In FIG. 3, 31 is a horizontal address calculator; 32 is a horizontal address calculator;
33 is a vertical address arithmetic unit, and 33 is each arithmetic unit 31.
32 is a conversion address generation device, 34 is a horizontal buffer memory, and 36 is an image memory.

The operation of the image conversion apparatus using the conventional conversion address generation apparatus configured as described above will be described below.

First, the horizontal address calculator 31 sequentially outputs horizontal conversion addresses according to the given horizontal reduction/movement parameters. The vertical address calculator 32 sequentially outputs vertical conversion addresses according to the given vertical reduction/movement parameters. The horizontal and vertical conversion addresses are input to the horizontal buffer memory 34 and the vertical conversion address to the image memory 35 as outputs from the conversion address generation device 33, respectively. The horizontal buffer memory 34 operates according to the horizontal translation address input from the translation address generation device 33.
By writing the original image into the back 7 memory, an image reduced and moved only in the horizontal direction is created and output. Image memory 3
In accordance with the vertical conversion address inputted from the conversion address generation device 33, 5 reduces and moves the image in the vertical direction by writing it into the image memory that has been reduced and moved only in the horizontal direction, and the new image that has been reduced and moved in the horizontal and vertical directions Create and output images. (For example, NEC technical report branch axis l,
3741/1984 pages 61-65) Problems to be Solved by the Invention However, in the above configuration, since the horizontal translation address and the vertical translation address are handled independently, the reduction in the two-dimensional child plane , had the problem that only movement conversion could be performed.

In view of the above-mentioned problems, the present invention calculates the original image coordinate values for the new image coordinate values by associating the original image coordinate values with the coordinate values on the given three-dimensional geometric structure shape surface and then performing perspective transformation. Another object of the present invention is to provide an image conversion device that can create a new image from an original image according to the original image coordinate values and the new image coordinate values.

Means for Solving the Problems In order to solve the above problems, the image conversion device of the present invention includes:
A given three-dimensional geometric structure representation.

a conversion address generation device that outputs a pixel coordinate value on a new image plane and a point coordinate value on an original image plane corresponding to the pixel coordinate value on the new image plane according to the coefficient 8 position, direction, viewpoint position, and screen position; an original image memory for storing the original image, a new image memory for storing the new image, an original write address control device for sequentially storing the original image in the original image memory, and a coordinate value of a point on the original image plane. an original read address control device that reads image data from the original image memory according to the above, a new write address control device that writes the image data to the new image memory according to the coordinate value of a point on the new image plane, and the new image memory. and an analysis/readout address control device that generates a new image by sequentially reading out images.

Operation The present invention uses the above-described configuration to calculate pixel coordinate values on a new image plane and pixels on the new image plane according to a given three-dimensional geometric structure expression, two coefficient positions, a direction, a viewpoint position, and a screen position. A new image can be created from the original image according to the original image coordinate value and the new image coordinate value by calculating the coordinate value of a point on the original image plane corresponding to the coordinate property.

Embodiment Hereinafter, an image conversion apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a conceptual diagram of an image conversion device according to an embodiment of the present invention.

In FIG. 2, 21 is the original image plane, 22 is a circular triangular plate,
23 is a shape plane, 24 is a shape triangle, 26 is a new image plane,
26 is a viewpoint, 27 is a triangular plate on the new image plane, 28 is a pixel coordinate value on the new image plane, and 29 is a coordinate end of a point on the 4 quintillion image plane.

The concept of the image conversion device will be explained below with reference to FIG. The purpose of the image conversion device of the present invention is to obtain the point inclination value of the original image plane "-" corresponding to each pixel coordinate value on the new image plane, and to obtain the point inclination value of the pixel dust t? The purpose is to transform the original image according to flW and the above point coordinate edge to obtain a new image. Here, the pixel coordinate value is an integer coordinate value assigned to each pixel.

Shape calculations are performed on each vertex of the original triangular plate 22 on the original image plane 21 without being shuffled, and the shape is converted into three-dimensional shape coordinates to obtain a shaped triangular plate 24. Further, by performing perspective transformation, the triangular plate 24 is projected onto the new image plane 25, and a triangular plate 27 on the new image plane is obtained.

As described above, the original triangular plate 22 on the original image plane 21 is associated with the triangular plate 27 on the prayer image plane.

Next, in order to obtain each pixel coordinate value on the Fr image plane and the Pisces value on the original image plane corresponding to the above pixel coordinate value, the pixel coordinate value 28 on the new image plane in the triangular plate 27 on the new image plane is calculated. Extract. Further, in accordance with the rule for associating each point coordinate value inside the triangular plate 27 on the new image plane with the point coordinate value inside the original triangular plate 22 on a one-to-one basis, the original image plane corresponding to the pixel coordinate value 28 on the new image plane is Obtain upper point coordinates 29.

Image deformation can be performed by reading and writing to and from the image memory according to the pixel coordinate value 28 on the FT image plane and the point coordinate value 29 on the original image plane.

FIG. 1 shows an image conversion device in one embodiment of the present invention. In FIG. 1, 11 is a conversion address generation device, 12 is a pixel coordinate value on a new image plane, 13 is a point coordinate value on an original image plane, 14 is an original successive address control device, 15
is the original write address control device, 16 is the original image memo 1c 1
7 is a new write address control device, 18 is an r'r image memory, and 19 is a new read address control device.

The operation of the image conversion apparatus configured as described above will be explained below with reference to FIG.

First, the conversion address generation device 11 generates pixel coordinates @12 on the new image plane according to the given three-dimensional geometric structure expression, coefficient 2 position, direction and viewpoint position, and screen position.
A point coordinate value 13 on the original image plane corresponding to the pixel coordinate end 12 on the new image plane is output.

The original sequential output address control device 14 reads image data from the original image written in the original image memory 16 by the original write address control device 15 by specifying the address using the coordinate value 13 of the point on the original image plane. The new write address control device 17 specifies the address of the image data using the pixel coordinate value 12 on the image plane and writes it into the new image memory 18. The read address control device 19 generates a new image by sequentially reading image data from the new image memory.

As described above, according to this embodiment, by using the configuration shown in FIG. 1, the original image coordinate values are associated with the coordinate values on the given three-dimensional geometric structure shape surface, and further perspective transformation is performed. By doing this, it is possible to calculate the original image coordinate value for the new image coordinate end, and create a new image from the original image according to the original image coordinate value □ and the new image coordinate value.

Effects of the Invention As described above, the present invention comprises a conversion address generation device, an original image memory, an original read address control device, a new image memory, and a new write address control device, thereby converting a given three-dimensional A new image can be obtained by deforming the original image according to the shape of the geometric structure, and the functions of the special effects device can be greatly expanded.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an image conversion device according to an embodiment of the present invention, FIG. 2 is a conceptual diagram of an image conversion device according to an embodiment of the present invention, and FIG. 3 is a configuration diagram of a conventional image conversion device. . 11... Conversion address generation device, 12...
...Pixel coordinate end on new image plane, 13...Point coordinate on original image plane (direct, 14...Original read address control device, 15...Original write address control device ,1
6... Original image memory, 17... New write address control device, 18... New image memory, 1
9... Analysis readout address control device, 21...
... Original image plane, 22 ... Original triangular plate, 23
...Shape surface, 24...--Shape triangular plate, 2
5...New image plane, 26...Viewpoint, 2
7... New image plane triangular plate, 28...
Pixel coordinate end on new image plane, 29...Coordinate value of point on original image plane. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Diagram/Installation/I-tf&・Direction Diagram 2

Claims (1)

[Claims] According to the given three-dimensional geometric structure expression, coefficient, position, direction, viewpoint position, and screen position, the pixel coordinate value on the new image plane and the meaning on the original image plane corresponding to the pixel coordinate value on the new image plane are calculated. a conversion address generation device for outputting coordinate values; an original image memory for storing the original image; a new image memory for storing the new image; and an original write address for sequentially storing the original image in the original image memory. a control device; an original read address control device that reads image data from the original image memory according to the coordinate values on the original image plane; and writes the image data to the new image memory according to the coordinate values on the new image plane. An image conversion device comprising: a new write address control device for generating a new image; and a new read address control device for generating a new image by sequentially reading from the new image memory.