JP2007212920A - Presentation system using a projector having a network function and presentation method - Google Patents

Abstract

In a presentation in which a part of image data displayed on an image signal device is designated by an area designation frame and only the image data of the designated area is enlarged and projected by a projector, the transfer speed is increased and the area is increased. An object of the present invention is to provide a presentation system and a presentation method using a projector having a network function, which facilitates an operation when selecting arbitrary image data using a designated frame.
An image data designated by an area designation frame transferred from an image signal device to a projector includes an identifier and enlargement ratio information that can easily determine whether or not the area designation is selected. The enlargement process is performed while maintaining the aspect ratio of the image data designated by the area designation frame on the side.
[Selection] Figure 3

Description

  The present invention uses a projector having a network function for projecting presentation data output from an image signal device to a projector via an arbitrary network when a presentation is performed using an image signal device typified by a personal computer. The present invention relates to a presentation system and a presentation method.

  In recent years, when a presentation is performed, a method of projecting presentation data created by an image signal device from a projector has become common. In the school education market, there is an increasing demand for enlarging and projecting only a part of the image displayed on the image signal device to the full screen.

  A conventional presentation system will be described below.

  Conventionally, a presentation system described in JP 2004-86277 A (Patent Document 1) is known. FIG. 8 shows an operational flowchart of the presentation system.

  First, the image signal device and the projector are connected by a USB cable (step S101), and the projector notifies the image signal device of the number of resolutions that can be displayed (step S102). Next, when the operator uses the area enlargement function to designate on the image signal apparatus (step S103), an area designation frame is displayed on the image signal apparatus (step S104), and the image designated by the area designation frame is displayed. Data is acquired by the image acquisition means (step S105). Thereafter, the image data acquired in step S105 is enlarged according to the enlargement ratio calculated from the information notified from step S102 (step S106). The enlarged image data is transferred to the projector through the USB cable (step S107). The image data transferred in step S107 is expanded into an arbitrary format (step S108), and then enlarged and projected from the projector (step S109).

By performing the above operation, only desired image data displayed on the image signal device can be transferred and displayed on the projector side.
JP 2004-86277 A (paragraph number “0079”)

  However, in the above conventional configuration, the image data acquired by the area designation frame is enlarged on the image signal device side, so that the amount of image data transferred from the image signal device to the projector increases, and the transfer speed becomes slow. Had a point.

In addition, while the aspect ratio of the area specification frame can be freely changed, the aspect ratio of the image enlarged and projected from the projector is fixed depending on the aspect ratio of the display element mounted on the projector.
Area designation frame: square (aspect ratio 1: 1)
Projector display resolution: XGA (aspect ratio 4: 3)
In this case, the perfect circle displayed in the area designation frame has a problem that it is enlarged and projected from the projector as a horizontally long ellipse.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and provides a presentation system and a presentation using a projector having a network function that enables only desired image data displayed on an image display device to be enlarged and projected from the projector at high speed. It aims to provide a method.

According to the first aspect of the present invention, a presentation using a projector having a network function including an image signal device represented by a personal computer and a projector connected to the image signal device through an arbitrary network network. In the system,
The image signal device comprises:
Image generation means for generating image data by arbitrary application software, display means A for displaying the image data generated by the image generation means on a display element represented by a liquid crystal panel, and the display means A An area designation frame generating means for generating an area designation frame for designating an area of the displayed image data when extracting only a part of the displayed image data, and the image data designated by the area designation frame generation means Image acquisition means for acquiring only image data, communication means A for transferring image data acquired by the image acquisition means to the projector via the network, the image generation means, the region designation frame generation means, and the Control means A represented by a microprocessor for controlling each of the communication means A,
The projector is
The communication means P for receiving the image data transferred from the image signal device, the image development means for developing the image data received by the communication means P into an arbitrary format, and the image development means A storage element for storing the image data; a display means P for inputting the image data stored in the storage element through the image expansion means and projecting the image data on a screen through an arbitrary display element; and the communication means P And control means P for controlling the image development means and the display means P, respectively.
The image development means is a presentation system using a projector having a network function, wherein the image development means has a function of enlarging the image data while maintaining an aspect ratio of the image data designated by the area designation frame. Is,
Only desired image data displayed on the image display device can be enlarged and projected from the projector at high speed.

According to a second aspect of the present invention, there is provided an application window having window detection means in which a plurality of detection positions are evenly arranged in the area designation frame, and displayed on each of the detection positions by the window detection means. The application window that occupies the most area in the area designation frame is selected, and the size of the area designation frame is automatically set by the designated frame size determining means to the size of the selected application window area. A presentation system using a projector having a network function according to claim 1, characterized in that:
Since it is not necessary for the operator to properly adjust the size of the area designation frame to the size of the application window area, only desired image data can be smoothly enlarged and projected from the projector.

The invention according to claim 3 is the presentation system using the projector having the network function according to claim 1, wherein the area designation frame size determining means is provided in a part of the area designation frame. Is,
Since it is not necessary for the operator to properly adjust the size of the area designation frame to the size of the application window area, only desired image data can be smoothly enlarged and projected from the projector.

According to a fourth aspect of the present invention, only a part of the image data displayed on the image signal device is enlarged, and a determination step for determining whether or not to enlarge and project from the projector to the screen, and enlargement in the determination step. When it is determined to project, an area designation frame display step for displaying an area designation frame for designating an area of desired image data displayed on the image signal device on the image signal device; and an area designation frame display step Maintaining the aspect ratio of the image data transferred by the image transfer step, the image acquisition step of acquiring the image data specified in the step, the image transfer step of transferring the image data acquired by the image acquisition step to the projector, and the image transfer step An image enlargement step for enlarging the image data in a state of being performed, and enlargement by the image enlargement step Is obtained by a presentation method using a projector having a network function, characterized in that an image display step of displaying the image data,
Only desired image data displayed on the image display device can be enlarged and projected from the projector at high speed.

  As described above, according to the present invention, an excellent effect can be obtained in which only a desired image data area displayed on an image display device can be enlarged and projected from a projector at high speed while maintaining an aspect ratio.

  In addition, since the area designation frame has a function of automatically detecting a desired application window area, it is possible to obtain an excellent effect that the operator can easily designate a desired image data area.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a configuration diagram of a presentation system using a projector having a network function according to Embodiment 1 of the present invention.

  In FIG. 1, 1 is an image signal device typified by a personal computer, 2 is a projector, 3 is an arbitrary network network that connects the image signal device 1 and the projector 2 via Ethernet (registered trademark), etc. It is a screen for projecting enlarged and projected image data. Reference numeral 5 denotes an area designation frame displayed on the image signal device 1.

  FIG. 2 is an internal configuration diagram of the image signal device 1 and the projector 2. In FIG. 2, 14 is an image generating means for generating image data by an arbitrary application software, 11 is a display means A and 12 for displaying the image data generated by the image generating means 14 on an arbitrary monitor, When extracting only a partial area of the image data displayed on the means A11, an area designation frame generating means 15 for generating an area designation frame for designating the area is selected by the area designation frame generating means 12. The image acquisition means 16 for acquiring only the designated image data area, 16 is a communication means A, 13 for transferring the image data acquired by the image acquisition means 15 to the projector 2 via an arbitrary network 3. Control means A, 22 represented by a microprocessor for controlling the image generation means 14, the area designation frame generation means 12 and the communication means A16, respectively, The communication means P and 24 for receiving the image data transferred from the signal device 1 are image development means for developing the image data received in the communication means P22 into an arbitrary format, and 23 is developed by the image development means 24. A storage element 25 for storing image data is display means P for enlarging and projecting the image data stored in the storage element 23 onto the screen 4 through a display element (not shown) mounted on the projector 2. Reference numeral 17 denotes input means represented by a keyboard and a mouse.

  The operation of the presentation system using the projector having the network function configured as described above will be described with reference to FIG.

  First, the image signal device 1 and the projector 2 are connected on the network 3 (step S1). As this connection method, for example, when Ethernet (registered trademark) is used as the network 3, there is a method of giving a fixed IP address of the same group to the image signal device 1 and the projector 2 in advance. An example is shown below.

Settings on the image signal device 1 side
IP: 192.168.16.1
Subnet mask: 255.255.255.0
Projector 2 settings
IP: 192.168.16.100
Subnet mask: 255.255.255.0
In addition, either the image signal device 1 or the projector 2 becomes a DHCP server, and connection is possible by a method of assigning an IP address to a device connected to an arbitrary network 3. Further, when a wireless network is used as the network 3, the image signal device 1 and the projector 2 can be connected by ad hoc connection. Normally, when the projector 2 is started from the standby power supply state, the lamp is turned on. The drive circuit for turning on the lamp is a high voltage circuit, and noise propagates inside the projector 2 during driving. That is, step S1 may not be performed normally during this lamp lighting operation. Therefore, the image signal device 1 always detects the lighting operation of the lamp mounted on the projector 2, and performs the operation of step S1 again after the lamp is turned on.

  After the image signal device 1 and the projector 2 are connected in step S1, a selection menu screen for selecting whether or not only a part of the image data displayed on the image signal device 1 is transferred to the projector 2 by the area enlargement function is displayed. The image is displayed on the image signal device 1 from the control means A13. The operator selects whether or not to use the area enlargement function using the input means 17 in accordance with the selection menu (step S2).

  When the operator selects to use the area enlargement function in step S2, the control means A13 controls the area designation frame generation means 12 to display the area designation frame 5 on the image signal device 1 (step S3). The area designation frame 5 can be freely changed in size and position by the input means 17 in the same manner as an application window area displayed on a normal personal computer. In addition, the area designation frame 5 is transparent, and arbitrary image data under the area designation frame 5 can be visualized, and buttons can be operated by the input means 17. When the area enlargement function is selected in step S2, image data of the area specified by the area specification frame 5 is acquired by the image acquisition means 15 (step S4), and the acquired image data is transmitted from the communication means A16 to an arbitrary network. The data is transferred to the communication means P22 in the projector 2 via the network 3 (step S5). The transferred image data includes an identifier indicating whether or not the area enlargement function is selected. If the area enlargement function is selected, the image data further includes information on the enlargement ratio. As an example of the enlargement ratio information, the number of horizontal dots and the number of vertical lines corresponding to the frame size of the area designation frame 5 displayed in step S3 can be cited. When the control means P21 of the projector 2 discriminates such identifier information, it is possible to easily determine whether or not the projector 2 performs the enlargement process on the image data transferred in step S5. Here, before transferring the image data to the projector 2, if only the information indicating whether or not the area expansion function is selected is notified from the image signal device 1 to the projector 2, the identifier information is included in the image data. Even if it is not, the same effect is obtained.

  The image data transferred in step S5 is expanded in an arbitrary format by the image expansion means 24 and stored in the storage element 23 (step S6). When transferring image data via the network 3, the uncompressed image data has a very large image data capacity through the network 3 and the transfer speed of the image data is slow. The image data capacity is reduced by JPEG compression or the like. That is, the image data compressed in step S5 needs to be expanded in step S6. Next, the control means P21 determines whether or not the area enlargement function transferred in step S5 is selected (step S7), and if it is determined in step S7 that the area enlargement function is selected, the image Based on the information transmitted from the signal device 1, the enlargement ratio is calculated in the control means P21 (step S8).

Here, the calculation method of the enlargement ratio in step S8 will be described. The resolution of the display element mounted on the projector 2 is
When XGA is horizontal = 1024 dots vertical = 768 lines, the frame size of the area designation frame 5
When horizontal = 320 dots and vertical = 128 lines, the enlargement ratio is as follows.

Horizontal = 1024/320 = 3.2 times Vertical = 768/120 = 6.4 times When the image data transferred from step S5 is enlarged using this enlargement ratio, the resolution of the display element mounted on the projector 2 Although it is possible to display the image up to the full size, since the horizontal and vertical enlargement rates are different, in the above-described example, a vertically long projection image is generated, and a sense of incongruity occurs. Therefore, when the horizontal and vertical enlargement ratios are different, the aspect ratio is maintained by applying the smaller enlargement ratio (horizontal = 3.2 times in the above example) to the larger enlargement ratio. Thus, it is possible to obtain a resolution that the projector 2 can project to the maximum extent.

Based on the enlargement ratio calculated in step S8, the image data stored in the storage element 23 is enlarged (step S9). As in the above example, when the aspect ratio of the display element mounted on the projector 2 and the aspect ratio of the area designation frame 5 are different, the size of the image data after the enlargement process is
Horizontal: 320 × 3.2 times = 1024 dots Vertical: 120 × 3.2 times = 384 lines, and in the vertical direction with respect to the number of resolutions of the display elements mounted on the projector 2,
An invalid display image data area of 768-384 = 384 lines is generated. By superimposing black data on the invalidated display image data area and arranging the enlarged image data at the center of the invalidated display image data area, the display quality of the image projected from the projector 2 is displayed. Can be raised. As a method of arranging in the center, for example, in the above example, there are 384 lines of invalid image data areas.
By displaying 192 lines of black data above and below the effective display image data from 384 lines / 2 = 192 lines, desired image data can be projected on the center of the screen 4 (step S10).

  When the image data in the area designation frame 5 is continuously acquired in step S4 and the image data acquired in step S5 is transferred to the projector 2, the operation load on the image acquisition unit 15 and the communication unit A16 increases, and the network 3 always. Since a large amount of image data continues to pass through, the network traffic increases, resulting in a problem that the display speed of the image data enlarged and projected from the projector 2 is reduced. In order to solve such a problem, as known in Japanese Patent Laid-Open No. 2003-050694, a method is proposed in which only changed image data is acquired and transferred to the projector 2 in step S4. .

  However, when only the image data in the area designation frame 5 is transferred to the projector 2, if only the image data that has changed as described above is transferred and the enlargement process is performed as it is, the image signal device 1 is stationary. When the projected image data is enlarged and projected from the projector 2, there arises a problem that the image data moves left and right or up and down without being stationary. This example will be described with reference to FIG.

In FIG. 4, the number of resolutions of the display element mounted on the projector 2 is
Horizontal: 1024 dots Vertical: 786 lines, and the frame size of the area designation frame 5 is
When horizontal: 200 dots, vertical: 100 lines, the enlargement ratio is 5.12 times as shown below.

Horizontal: 1024/200 = 5.12 times Vertical: 768/100 = 7.68 times Here, when the difference data area A30 is transferred from the image signal device 1 to the projector 2, the origin coordinates of the difference data area A30 (X0) , Y0) = (10, 50)
Is
Horizontal: 10 × 5.12 = 51.2 dots Vertical: 50 × 5.12 = 256 lines. By rounding off after the decimal point, the coordinates are converted to the following coordinate positions in the display area enlarged and projected from the projector 2. The

(X0 ′, Y0 ′) = (51,256)
Thus, arbitrary coordinates (X, Y) = (22, 83) included in the difference data area A30
Is the origin coordinate (X0, Y0)
Horizontal: 22-10 = 12 dots Vertical: 83-50 = 33 Because the line position is shifted,
Horizontal: 12 × 5.12 + X0 ′ = 61.44 + 51 = 1112.44
Vertical: 33 × 5.12 + Y0 ′ = 168.9 + 256 = 424.9
Thus, by rounding off the decimal part, in the display area enlarged and projected from the projector 2, it is converted into the coordinate position of the following equation (1).

(X ′, Y ′) = (112,425) (1)
Next, when the difference data area B31 is transferred from the image signal device 1 to the projector 2,
(X, Y) = (22, 83)
Is
Horizontal: 22 x 5.12 = 112.6
Vertical: 83 × 5.12 = 425
Thus, by rounding off the decimal part, in the display area enlarged and projected from the projector 2, it is converted into the coordinate position of the following equation (2).

(X ′, Y ′) = (113,425) (2)
That is, even in the image data with the same coordinate position (X, Y) = (22, 83), the coordinates of the display area enlarged and projected from the projector 2 as shown in the above example, depending on the origin coordinate position of the difference data area. Since the positions are different, there arises a problem that the image data that should be stationary appears to move horizontally or vertically. Therefore, in step S6, the image data expanded to an arbitrary image format is not immediately expanded, but the corresponding image data in the original image data area secured in the storage element 23 is first overwritten. Thereafter, in step S9, the above-described problem can be easily solved by always expanding the entire original image data area.

  As described above, according to the present embodiment, when the area designation frame 5 is displayed on the image signal device 1 and the operator selects the area enlargement function, the image designated by the area designation frame 5 from the projector 2. Only the data can be enlarged and projected on the screen 4, and only the image data that the operator wants to show to the listener can be projected from the projector 2.

(Embodiment 2)
FIG. 5 is an explanatory diagram of the operation of the presentation system using the projector having the network function according to the second embodiment of the present invention. In addition, the same code | symbol is used about the same structure as Embodiment 1 mentioned above, and description is abbreviate | omitted.

  In the first embodiment, the area designation frame 5 is displayed on the image signal device 1, and the area is designated by using a pointing device such as a mouse when the operator selects only the image data desired to be shown to the listener. Although it is necessary to change the position and size of the frame 5, in order not to show any unnecessary image data, the position and size of the area designation frame 5 are displayed exactly on the image signal device 1. Therefore, there is a problem that it takes time to display only a desired area from the projector 2 as a result.

  In order to solve such a problem, in the second embodiment, as shown in FIG. 5, a frame size automatic adjustment button 43 is provided in the area designation frame 5, and the operator places the area designation frame 5 on a desired application window. When the frame size automatic adjustment button 43 is pressed, the frame size of the area designation frame 5 can be automatically adjusted to the size of a desired application window. For example, in FIG. 5, when the application window A41 and the application window B42 are displayed on the image signal device 1, and the operator enlarges and projects only the image data displayed in the application window B42 from the projector 2, the operator In step S3, the area designation frame 5 is displayed on the image signal device 1, and the input means 17 moves the area designation frame 5 almost above the application window B42. Therefore, by pressing the frame size automatic adjustment button 43, the size of the area designation frame 5 automatically matches the size of the application window B42, and the operator can enlarge and project only desired image data from the projector 2. .

  Here, the operation of the frame size automatic adjustment button 43 will be described with reference to FIG. First, the area designation frame 5 is divided into nine as shown by broken lines in the figure, and five points are determined by combining the four points of the intersection coordinates and the one point of the center coordinates. Using these five points as detection positions, the application windows displayed on the respective detection positions are detected, and the largest application window is selected by majority vote. Since the control means A13 knows the position and size information of the application window selected by the window detecting means for performing such an operation, it is selected by controlling the area designation frame generating means 12 based on the information. This can be easily achieved by the designated frame size determining means for matching the size and position of the area designation frame 5 to the application window.

  In FIG. 6, the detection position for selecting the application window is set to 5 points. However, the same effect can be obtained by a method of only 1 point at the center or 9 points obtained by adding the center positions of the blocks divided into 9 parts. .

  FIG. 5 shows an example in which the size of the area specification frame 5 is matched with the entire size of the application window. However, some application windows have a plurality of pane areas as shown in FIG. For the application window, the size of the area designation frame 5 may be matched with the size of the pane area including the largest number of detection positions without matching the size of the area designation frame 5 with the entire size of the application window. For example, in a Microsoft media player, there is a moving image display area, a menu screen display area, or a title list display area as a pane area, and the operator wants to show only moving image data to the listener. Also, as shown in FIG. 7, it can be easily realized by matching the size of the area designation frame 5 to the pane area.

  As described above, according to the present embodiment, by providing the frame size automatic adjustment button 43 in the region designation frame 5, the operator can obtain the size of the region designation frame 5 that matches the size of the desired application window. Thus, only desired image data can be rapidly projected from the projector 2 to the listener.

  A presentation system using a projector having a network function according to the present invention has an effect of enabling only desired image data displayed on an image signal device such as a personal computer to be rapidly projected from a projector, and will be widely used in the future. This is useful as a projector having a network function expected to advance, or as a presentation system using a plasma display or a liquid crystal display.

Configuration diagram of a presentation system using a projector having a network function in Embodiment 1 of the present invention Internal configuration diagram of a presentation system using a projector having a network function in the first embodiment Operation explanatory diagram of the presentation system using the projector having the network function in the first embodiment Operation explanatory diagram of the presentation system using the projector having the network function in the first embodiment Operation explanatory diagram of a presentation system using a projector having a network function in Embodiment 2 of the present invention Operation explanatory diagram of the frame size automatic adjustment button using the projector having the network function in the second embodiment Operation explanatory diagram of a presentation system using a projector having a network function in Embodiment 2 of the present invention Configuration diagram of a presentation system using a conventional projector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image signal apparatus 2 Projector 3 Arbitrary network 4 Screen 5 Area designation frame 11, 25 Display means 12 Area designation frame generation means 13, 21 Control means 14 Image generation means 15 Image acquisition means 16, 22 Communication means 17 Input means 23 Memory element 24 Image development means 30, 31 Difference data area 41, 42, 44 Application window 43 Frame size automatic adjustment button

Claims (4)

In a presentation system using a projector having a network function composed of an image signal device represented by a personal computer and a projector connected to the image signal device through an arbitrary network network,
The image signal device comprises:
Image generation means for generating image data by arbitrary application software, display means A for displaying the image data generated by the image generation means on a display element represented by a liquid crystal panel, and the display means A An area designation frame generating means for generating an area designation frame for designating an area of the displayed image data when extracting only a part of the displayed image data, and the image data designated by the area designation frame generation means Image acquisition means for acquiring only image data, communication means A for transferring image data acquired by the image acquisition means to the projector via the network, the image generation means, the region designation frame generation means, and the Control means A represented by a microprocessor for controlling each of the communication means A,
The projector is
The communication means P for receiving the image data transferred from the image signal device, the image development means for developing the image data received by the communication means P into an arbitrary format, and the image development means A storage element for storing the image data; a display means P for inputting the image data stored in the storage element through the image expansion means and projecting the image data on a screen through an arbitrary display element; and the communication means P And control means P for controlling the image development means and the display means P, respectively.
The presentation system using a projector having a network function, wherein the image expansion means has a function of enlarging the image data while maintaining an aspect ratio of the image data designated by the area designation frame. A plurality of detection positions arranged uniformly within the region designation frame; and a window detecting unit that detects an application window displayed on each of the detection positions by the window detection unit; The application window that occupies the most area is selected, and the size of the area designation frame is automatically adjusted to the size of the selected application window area by the designated frame size determining means. A presentation system using a projector having the network function according to 1. 2. The presentation system using a projector having a network function according to claim 1, wherein the area designation frame size determining means is provided in a part of the area designation frame. A determination step of determining whether or not to enlarge and project only a part of the image data displayed on the image signal device and performing an enlarged projection on the screen from the projector; An area designation frame for designating an area of desired image data displayed on the apparatus, an area designation frame display step for displaying on the image signal apparatus, and image data designated in the area designation frame display step are acquired. An image acquisition step; an image transfer step of transferring the image data acquired in the image acquisition step to the projector; and the image data is enlarged while maintaining an aspect ratio of the image data transferred in the image transfer step. An image enlargement step and the image data enlarged by the image enlargement step Presentation method using a projector having a network function, characterized in that an image display step.

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