JP2012249257A - Video display device, photographing device, video system, display method, information reading method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video system capable of acquiring non-image data when acquiring an image, even if special hardware is not provided.SOLUTION: A CPU 11 corrects a video signal such that dots forming a video corresponding to the video signal flicker according to data for superimposition, thereby generating a superimposed video signal for indicating a superimposed video in which the data for superimposition is superimposed on the video. A video display part 12 displays the superimposed video indicated by the superimposed video signal.

Description

  The present invention relates to a technique for superimposing data on a video.

  In the field of imaging devices that capture an image by photographing a subject, a technique has been proposed in which data such as related data related to the image is further acquired when the image is acquired using infrared or optical wireless communication. Yes.

  For example, in Patent Document 1, light from a tracking target having an infrared marker drawn with an infrared light emitting material that generates infrared light is acquired separately from infrared light and visible light, and an image and infrared light corresponding to visible light are obtained. An augmented reality system (AR) that superimposes and displays data corresponding to the data is described.

  Patent Document 2 captures an image by capturing an image of a subject, acquires data transmitted by a light source disposed in the vicinity of the subject using optical wireless communication, and simultaneously displays the image and the data. An imaging device is described.

  Further, Patent Document 3 analyzes an image acquired by photographing a subject, extracts a feature portion such as a building from the image, and further transmits data related to the feature portion to a terminal on a communication network. The superimposition information presentation apparatus acquired from the above is described.

Special table 2008-508591 JP 2011-009804 A Re-specialized WO2008 / 016083

  In order to acquire data different from an image using the techniques described in Patent Documents 1 to 3, there is a problem that special hardware is required.

  For example, the extended reality system described in Patent Document 1 requires an optical member for separating infrared light and visible light. In addition, the imaging device described in Patent Document 2 requires a light source capable of optical wireless communication, and further requires a receiver that performs optical wireless communication for the imaging device. Moreover, in the superimposition information presentation apparatus described in Patent Document 3, a communication apparatus for connecting to a communication network is required.

  Note that the data that can be acquired by the superimposition information presentation device described in Patent Document 3 is limited to data related to the characteristic portion of the video, and therefore the data provider does not necessarily provide the desired data to the viewer of the video. There is also a problem that it cannot be acquired.

  An object of the present invention is to provide a video display device, a photographing device, a video system, a display method, an information reading method, and a program capable of acquiring data different from an image when acquiring an image without special hardware. Is to provide.

  The video display device according to the present invention corrects the video signal so that dots forming a video corresponding to the video signal blink according to the superimposition data, and the superimposition in which the superimposition data is superimposed on the video. A control unit that generates a superimposed video signal indicating a video; and a video display unit that displays the superimposed video indicated by the superimposed video signal.

  The imaging device according to the present invention, an acquisition unit that acquires the captured image by capturing the superimposed video displayed on the video display device, and the brightness of the dots forming the captured image, And a management unit that reads the superimposed data superimposed on the superimposed video.

  The video system according to the present invention includes the video display device and the photographing device.

  The display method according to the present invention corrects the video signal so that dots forming the video corresponding to the video signal blink according to the superposition data, and the superimposed video in which the superposition data is superimposed on the video. Is generated, and the superimposed video indicated by the superimposed video signal is displayed.

  In the information reading method according to the present invention, the superimposed video displayed on the video display device is photographed to obtain a photographed image, the luminance of the dots forming the photographed image is analyzed, and the superimposed video is obtained from the photographed image. The superimposed data superimposed on is read.

  The first program according to the present invention corrects the video signal so that dots forming a video corresponding to the video signal blink according to the superimposition data, and the superimposition data is superimposed on the video. A computer is caused to execute a process of generating a superimposed video signal indicating a superimposed video and a process of displaying the superimposed video indicated by the superimposed video signal.

  A second program according to the present invention is a method for capturing a captured image by capturing a superimposed image displayed on the image display device, analyzing a luminance of dots forming the captured image, and analyzing the luminance from the captured image. And causing the computer to execute a process of reading the superimposed data superimposed on the superimposed video.

  According to the present invention, it is possible to acquire data different from an image when acquiring an image without special hardware.

It is a figure which shows the video system of the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of a projector. It is a block diagram which shows an example of a structure of an imaging device. It is a figure for demonstrating an example of the correspondence of the blink pattern of each dot in an image | video, and each imaging | photography dot of a picked-up image. It is a figure which shows an example of the correspondence of a two-dimensional code, a section, and a blink pattern. It is a figure which shows an example of an image | video and data. It is a flowchart which shows an example of operation | movement of an imaging device. It is a figure for demonstrating a difference image. It is a figure which shows the video system of the 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, components having the same function may be denoted by the same reference numerals and description thereof may be omitted.

  FIG. 1 is a diagram showing a video system according to a first embodiment of the present invention. In FIG. 1, the video system includes a projector 10 and a photographing machine 20.

  The projector 10 is a video display device that displays video, and more specifically, is a projector that projects and displays video on a projection surface 30 such as a screen. The photographing machine 20 is a photographing device that photographs the surroundings and acquires a photographed image.

  FIG. 2 is a block diagram illustrating an example of the configuration of the projector 10. In FIG. 2, the projector 10 includes a CPU 11 and a video display unit 12.

  The CPU 11 is a control unit that realizes the following functions by being controlled by a program.

  The CPU 11 receives a video signal indicating an image formed by a plurality of dots and a data signal indicating data to be superimposed on the video signal from an external device (not shown) such as a personal computer.

  The CPU 11 corrects the video signal based on the data so that the video dot which is the dot forming the video indicated by the video signal flashes in accordance with the data indicated by the data signal, and the video on which the data is superimposed A superimposed video signal indicating the superimposed video is generated. The data indicated by the data signal is an example of superimposition data.

  The video display unit 12 projects and displays the superimposed video indicated by the superimposed video signal on the projection surface 30 based on the superimposed video signal generated by the CPU 11.

  More specifically, the video display unit 12 includes an LED (Light Emitting Diode) unit 12A, a display element 12B, and a lens unit 12C.

  The LED unit 12A is a light source that causes light to enter the display element 12B. The display element 12B modulates the light from the LED unit 12A according to the superimposed video signal and projects the light onto the projection surface 30 via the lens unit 12C, thereby displaying the superimposed image on the projection surface 30. The light source is not limited to the LED, and can be changed as appropriate. Examples of the display element 12B include a liquid crystal panel.

  FIG. 3 is a block diagram illustrating an example of the configuration of the photographing device 20. In FIG. 3, the photographing machine 20 includes a key operation unit 21, a camera unit 22, a management unit 23, a display unit 24, and a storage unit 25.

  The key operation unit 21 detects various operations from the user. For example, the key operation unit 21 detects pressing of a predetermined key as a shooting start operation for starting shooting.

  The camera unit 22 is a video acquisition unit that captures an image of the surroundings and acquires a captured image when a shooting start operation is detected by the key operation unit 21. In the following, it is assumed that the camera unit 22 captures a superimposed image displayed on the projection surface 30 by the projector 10 and acquires a captured image indicating the superimposed image.

  For example, the management unit 23 includes an arithmetic device such as a CPU and a recording device such as a memory. Further, the management unit 23 analyzes the luminance of the shooting dots forming the shot image acquired by the camera unit 22, reads the data superimposed on the superimposed video from the shot image, and reads the read data and the shot image. It is displayed on the display unit 24.

  The storage unit 25 stores various information. For example, the storage unit 25 stores a group ID that is identification information that identifies the attribute of the user of the photographing machine 20. Examples of the attribute include the company to which the user belongs, age, and sex.

  Hereinafter, data superposition and reading will be described in more detail. Note that the superimposing and reading of data in the present embodiment uses the residual phenomenon that occurs with the naked eye and the difference in resolution and processing speed between the projector 10 and the photographing device 20.

  As described above, in the projector 10, the CPU 11 corrects the video signal based on the data so that the video dots forming the video indicated by the video signal blink according to the data.

  At this time, the CPU 11 uses the video signal as data so that the video is divided by a plurality of sections formed by a plurality of video dots, and the blinking pattern in which each video dot in the section blinks changes for each section. Correct accordingly.

  The video is formed of a dot matrix in which video dots are arranged in the horizontal direction and the vertical direction, respectively, and the section has a plurality of continuous video dots in each of the horizontal direction and the vertical direction of the video. It is supposed to be.

  Further, the CPU 11 corrects the video signal so that each display dot of the displayed superimposed video blinks at a blinking speed so that it can be visually recognized that it is continuously lit by humans in all blink patterns. Shall. In this case, it is recognized by human beings that each display dot is continuously lit at an intermediate luminance between the luminance at the time of lighting and the luminance at the time of extinction. Therefore, in order to minimize the difference between the luminance of each video dot of the original video corresponding to the video signal and the luminance of each display dot forming the superimposed video, which is recognized by humans, the CPU 11 It is desirable to correct the video signal so that the brightness of each display dot when it is lit is higher than the brightness of the original video dot.

  On the other hand, it is assumed that the recognition speed at which a captured image is acquired by the camera unit 22 of the photographing machine 20 is a speed at which blinking of each display dot in the superimposed video can be recognized. In addition, the camera unit 22 cannot recognize each display dot of the superimposed video individually, and has a resolution such that one section in the superimposed video becomes one shooting dot of the captured image.

  FIG. 4 is a diagram for explaining an example of the correspondence relationship between the blinking pattern of each display dot of the superimposed video and each shooting dot of the shot image. In FIG. 4, the section has two display dots for each of the horizontal direction and the vertical direction of the superimposed video.

  In FIG. 4, there are two types of blinking patterns: a blinking pattern A that is a first blinking pattern and a blinking pattern B that is a second blinking pattern.

  The blinking pattern A is a pattern in which lighting states of two adjacent dots adjacent to each other in the section are reversed. That is, in the blink pattern A, each display dot in the section blinks so that one of the adjacent dots is turned on and the other of the adjacent dots is turned off.

  Accordingly, since one section of the superimposed image becomes one shooting dot of the captured image, the section of the blinking pattern A is the combination of the display dot that is turned on and the display dot that is turned off in the captured image. This is a shooting dot having an intermediate luminance that is an intermediate luminance between a high luminance corresponding to the luminance at the time of lighting and a low luminance corresponding to the luminance at the time of turning off the display dot.

  On the other hand, the blinking pattern B is a pattern in which the lighting states of all display dots in the section are the same. That is, in the blink pattern B, all display dots in the section blink simultaneously.

  Therefore, the section of the blinking pattern B corresponds to the brightness when the display dots are lit in the captured image because only the display dots that are lit or only the display dots that are turned off are aligned in the captured image. The shooting dots have high brightness or low brightness corresponding to the brightness when the display dots are turned off.

  In this case, the management unit 23 of the photographing machine 20 analyzes the luminance of each photographing dot of the photographed image and reads the superimposed data from the photographed image.

  The specifics of data superposition and reading will be described.

  In the following, it is assumed that the data indicated by the data signal is expressed in the form of a two-dimensional code that is a two-dimensional dot pattern such as a QR code (registered trademark). The two-dimensional code is composed of black level code dots and white level code dots.

  When the data is represented by a two-dimensional code, the CPU 11 associates each code dot of the two-dimensional code with each section of the video indicated by the video signal, and the blink pattern of each section corresponds to the code dot corresponding to that section. The video signal is corrected so as to change in accordance with.

  FIG. 5 is a diagram illustrating an example of a correspondence relationship between a two-dimensional code, a section, and a blinking pattern.

  FIG. 5 shows four sections 1 to 4 in the video and a two-dimensional code corresponding to the sections. The code dots corresponding to section 1 are at the white level, and the code dots corresponding to sections 2 to 4 are at the black level.

  At this time, for example, the CPU 11 causes the section 1 corresponding to the white level code dots to flash with the flashing pattern A and the sections 2 to 4 corresponding to the black level code dots to flash with the flashing pattern B. A superimposed video signal is generated by correcting the video signal.

  Since the camera unit 22 of the photographing machine 20 recognizes one session of the superimposed video as one shooting dot, when the superimposed video corresponding to the superimposed video signal generated as described above is shot, as shown in FIG. The section of the pattern A is a shooting dot having intermediate luminance in the captured image, and the section of the blinking pattern B is a shooting dot having low luminance or high luminance in the captured image. For this reason, the luminance of the shooting dots corresponding to section 1 is intermediate luminance, and the luminance of the shooting dots corresponding to each of sections 2 to 4 is low luminance or high luminance.

  The management unit 23 analyzes the luminance of each dot of the photographed image, regards the medium luminance photographing dot as the white level code dot in the two-dimensional code, and treats the low-luminance or high-luminance photographing dot as the black level in the two-dimensional code. The two-dimensional code is read from the photographed image by regarding it as a code dot. The management unit 23 decodes the two-dimensional code to acquire original data, and displays the data and the captured image on the display unit 24.

  FIG. 6 is a diagram illustrating an example of video and data.

  In the example of FIG. 6, the video indicated by the video signal represents only the frame that is the coordinate axis of the bar graph, as shown in FIG. The data indicated by the data signal has a graph body that is a bar of a bar graph. More specifically, the data has two types of graph bodies as indicated by the solid lines in FIG. 6 (b1) and FIG. 6 (b2), and each graph body identifies the user of the camera 20 Identification information to be associated with each other. Furthermore, the data is represented in the form of a two-dimensional code. In this case, a superimposed image in which the image and data are superimposed is formed with display dots that are lit and display dots that are not lit as shown in FIG.

  However, since blinking of the superimposed video is not recognized by humans, only humans can recognize the frames as shown in FIG.

  On the other hand, since the camera 20 recognizes the blinking of the superimposed image and one section of the superimposed image becomes one shooting dot of the camera 20, the camera unit 22 is shown in FIGS. 6 (d1) and 6 (d2). In this way, a captured image formed by the intermediate luminance shooting dots and the low luminance or high luminance shooting dots is acquired. The management unit 23 reads the two-dimensional code by regarding the intermediate luminance shooting dot as the white level of the two-dimensional code and regarding the low luminance or high luminance shooting dot as the black level of the two-dimensional code. To obtain two types of graph bodies.

  Then, the management unit 23 displays the graph body associated with the same identification information as the identification information stored in the storage unit 25 on the display unit 23 so as to be superimposed on the captured image.

  At this time, each captured dot of the captured image blinks at high speed as in the superimposed image, so that it is recognized by a human as a bar graph frame as shown in FIG. Since the captured image displayed on the display unit 23 is superimposed on the graph body, a human recognizes it as an image having a frame and a graph body as shown in FIG. 6 (e1) or FIG. 6 (e2). .

  Next, the operation of the video system of this embodiment will be described.

  In the projector 10, the CPU 11 generates a superimposed video signal based on the input video signal and data signal, and inputs the superimposed video signal to the display element 12 </ b> B of the video display unit 12. The display element 12B modulates light from the light source 12A according to the superimposed video signal, projects the light onto the projection surface 30 via the lens unit 12C, and displays the superimposed video on the projection surface 30. Also, it is assumed that the entire superimposed image is divided into sections, and the flashing patterns A and B are included in the flashing pattern of each section.

  FIG. 7 is a diagram for explaining the operation of the photographing device 20.

  Note that the user of the photographing device 20 directs the camera unit 22 to the projection surface 30 and performs a photographing start operation on the key operation unit 21 to start photographing. The key operation unit 21 detects a shooting start operation and outputs a start operation detection signal to the management unit 23. Upon receiving the start operation detection signal, the management unit 23 drives the camera unit 22.

  Then, the camera unit 22 repeatedly captures the superimposed image at a speed for recognizing blinking of each dot of the superimposed video, and outputs the captured image to the management unit 23 (step S701).

  The management unit 23 receives the captured image, analyzes the brightness of each captured dot in the captured image, and obtains a brightness distribution (a brightness histogram) that is a brightness distribution of each captured dot (step S702).

  Then, the management unit 23 determines whether or not the peak value in the luminance distribution is greater than or equal to a predetermined threshold value (step S703). When the superimposed image is reflected in the captured image, the superimposed image includes dots that blink with the blinking pattern B. In the captured image, the blinking pattern B is a captured dot with high or low luminance. Since a peak occurs in a high-luminance region or a low-luminance region and the peak value is relatively large, it can be considered that a superimposed image is reflected in a captured image when the peak value is equal to or greater than a threshold value.

  Therefore, when the peak value is less than the threshold value, the management unit 23 determines that the superimposed image is not shown in the captured image, and ends the process. When the peak value is equal to or greater than the threshold value, the management unit 23 It is determined that the superimposed video is reflected, and reading processing for reading the superimposed data from the captured image is performed.

  In the reading process, first, the management unit 23 determines whether or not the peak of the luminance distribution is on the high luminance side of the luminance distribution (step S704). More specifically, the management unit 23 determines whether the peak luminance is equal to or higher than a predetermined luminance. If the peak luminance is equal to or higher than the predetermined luminance, the management unit 23 determines that the peak is on the high luminance side, and the peak luminance is If it is less than the predetermined luminance, it is determined that the peak is on the low luminance side. The predetermined luminance is a median value of the luminance distribution or a value near the median value.

  When the peak is on the low luminance side, the management unit 23 regards the luminance included in the first predetermined luminance range as the low luminance, and includes it in the second predetermined luminance range on the higher luminance side than the first predetermined luminance range. Is considered as intermediate brightness. Then, the management unit 23 converts the low-brightness shooting dots into black-level code dots in the two-dimensional code, and sets the intermediate-brightness shooting dots as white-level code dots in the two-dimensional code, so that the two-dimensional code is obtained from the shot image. Is restored (step S705).

  Then, the management unit 23 decodes the two-dimensional code to restore data, and superimposes the data on the captured image and displays the data on the display unit 24 (step S706).

  When the data has a plurality of partial data such as the graph body shown in FIG. 6 and each partial data is associated with the identification information, the management unit 23 is stored in the storage unit 25. The partial data associated with the same identification information as the identification information is superimposed on the captured image and displayed on the display unit 24.

  In general, in a two-dimensional code such as a QR code, position detection patterns for specifying a secondary code area are provided at four corners. In a reading apparatus that reads a two-dimensional code, a position detection pattern is obtained from a captured image. The two-dimensional code is decoded based on the position detection pattern. The management unit 23 determines the position detection pattern from the white level and black level code dot patterns, and identifies the area of the two-dimensional code based on the position detection pattern, as in this general reading device. Decode the two-dimensional code.

  When the peak is on the high luminance side, the captured image shows the lighting state of the dots blinking in the blinking pattern B in the superimposed image. For this reason, a high-luminance shooting dot in the captured image becomes a black-level code dot in the two-dimensional code, but since the luminance of the lit dot in the superimposed image depends on the original video signal, the high-luminance shooting dot May not be accurately determined.

  For this reason, when the peak is on the high luminance side, the management unit 23 determines whether the high luminance peak is clear (step S707). More specifically, the management unit 23 determines whether or not the peak value is equal to or higher than a second threshold value higher than the threshold value, and determines that the peak is clear when the peak value is equal to or higher than the second threshold value, If the peak value is less than the second threshold, it is determined that the peak is not clear.

  When the peak is clear, the management unit 23 inverts the luminance of the captured image. Then, the luminance included in the first predetermined luminance range is regarded as low luminance, the luminance included in the second predetermined luminance range is regarded as intermediate luminance, the low luminance dot is a black level dot in the two-dimensional code, The two-dimensional code is restored by setting the luminance dot as the white level dot in the two-dimensional code (step S708). Thereafter, the management unit 23 executes the process of step S706.

  On the other hand, when the peak is not clear, the management unit 23 determines whether or not a previous frame image that is a frame before the current captured image is stored in the storage unit 25 (step S709).

  When the previous frame image is stored, the management unit 23 generates a difference image that takes the luminance of each dot of the previous frame image and the luminance difference of each dot of the current photographed image (step S710).

  FIG. 8 is a diagram for explaining the difference image. As shown in FIG. 8, when data is superimposed on the original video, if the luminance of the peak value of the current captured image is on the high luminance side, the luminance of the peak value of the previous frame image is on the low luminance side. become. Further, the brightness near the intermediate brightness is not significantly different between the current captured image and the previous frame image. For this reason, in the difference image, the luminance near the intermediate luminance between the captured image and the previous frame image is low, and the high luminance of the captured image (low luminance of the previous frame image) is the intermediate luminance.

  Therefore, the management unit 23 sets the intermediate luminance dot of the difference image as the black level code dot in the two-dimensional code, sets the low luminance dot of the difference image as the white level dot in the two-dimensional code, and sets the intermediate luminance dot of the difference image. The two-dimensional code is restored by setting the dot to a black level dot in the two-dimensional code (step S712).

  As described above, according to the present embodiment, the dots forming the video blink according to the data. In addition, data is read from the captured image by analyzing the luminance of the captured image obtained by capturing the video. For this reason, the image and data can be acquired simply by pointing the photographing device 20 to the displayed video, and even when there is no special hardware, data different from the image is acquired when the image is acquired. Is possible. Further, since it is not necessary to extract a characteristic part such as a building from the photographed image, it becomes possible for the data provider to acquire desired data by the wand of the picture.

  In addition, since data corresponding to the identification information included in the data is displayed together with the video, the data provided to the viewer can be changed according to the attributes such as the company, age and gender of the viewer while viewing the same video. Is possible.

  Next, a second embodiment of the present invention will be described.

  FIG. 9 is a diagram showing a video system according to the second embodiment of the present invention.

  In FIG. 9, the video system includes a video display device 100 and a photographing device 200.

  The video display device 100 includes a control unit 101 and a video display unit 102.

  The control unit 101 includes an arithmetic device such as a CPU and a recording device such as a memory. In addition, a video signal is input to the control unit 101.

  The control unit 101 corrects the video signal so that the dots forming the video according to the video signal blink according to the superimposition data, and the superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video Is generated. Note that the superimposition data may be held in advance by the control unit 101, or may be input from the outside as in the first embodiment.

  The format of the superimposition data is not limited to a two-dimensional code, and may be a one-dimensional code such as a barcode or other formats. In addition, the superimposition data (for example, a two-dimensional code) is not limited to one per screen, and may be plural. In this case, a plurality of data can be displayed superimposed on the video.

  The video display unit 102 displays the superimposed video generated by the control unit 101 and indicated by the superimposed video signal. The video display unit 102 may display the superimposed video by projecting light onto the projection surface as in the first embodiment, or may display the superimposed video on the display surface provided in the video display unit 102.

  The imaging apparatus 200 includes an acquisition unit 201 and a management unit 202.

  The acquisition unit 201 acquires a captured image by capturing a superimposed image displayed on the image display device 100. The management unit 202 analyzes the luminance of the dots forming the captured image acquired by the acquisition unit 201, and reads the superimposed data superimposed on the superimposed video from the captured image.

  Even in the present embodiment, it is possible to acquire data different from an image when acquiring an image without special hardware as in the first embodiment.

  Note that the functions of the projector 10, the photographing device 20, the video display device 100, and the photographing device 200 described in each embodiment may be realized by dedicated hardware, or a program for realizing the function. It may be realized by recording on a computer-readable recording medium and reading and executing the program recorded on the recording medium.

  In each embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.

  For example, the photographing device 10 and the photographing device 100 may be included in a terminal device such as a mobile phone, a smartphone, a game machine, a tablet PC, and a node PC.

  In addition, the video system described in each embodiment includes an advertising system in which advertising information is superimposed on a street display that displays video, and data according to attributes such as employee departments at the time of company announcements. The present invention may be applied to a presentation system that distributes.

  Moreover, although part or all of each said embodiment can be described like the following additional remarks, it is not limited to the following.

[Appendix 1]
The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. A control unit,
A video display unit configured to display a superimposed video indicated by the superimposed video signal.

[Appendix 2]
The video according to claim 1, wherein the control unit corrects the video signal so that the video is divided by a plurality of sections having the plurality of dots, and a blinking pattern in which the dots blink is changed in units of the sections. Display device.

[Appendix 3]
The superimposition data is represented by a two-dimensional code,
The control unit associates each code dot of the two-dimensional code with each section, and corrects the video signal so that the blinking pattern of the section changes according to the code dot corresponding to the section. 2. The video display device according to 2.

[Appendix 4]
The blinking pattern includes a first blinking pattern in which each dot in the section blinks, so that one of two adjacent dots in the section that are adjacent to each other is turned on and the other is turned off. 4. The video display device according to appendix 2 or 3, which has a second blinking pattern in which dots blink simultaneously.

[Appendix 5]
An acquisition unit that captures a superimposed image displayed by the video display device according to any one of appendices 1 to 4 and acquires a captured image;
And a management unit that analyzes luminance of dots forming the captured image and reads data for superimposition superimposed on the superimposed video from the captured image.

[Appendix 6]
A display unit;
A storage unit that stores identification information that identifies the user's attributes;
In the superimposed data, each of a plurality of partial data is associated with the identification information,
The imaging apparatus according to appendix 5, wherein the management unit displays partial data corresponding to the same identification information as the identification information stored in the storage unit on the display unit.

[Appendix 7]
A video system comprising the video display device according to any one of appendices 1 to 4 and the photographing device according to appendix 5 or 6.

[Appendix 8]
The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. And
A display method for displaying a superimposed video indicated by the superimposed video signal.

[Appendix 9]
Shooting the superimposed video displayed on the video display device according to any one of appendices 1 to 4 to obtain a captured image;
An information reading method for analyzing luminance of dots forming the captured image and reading superimposed data superimposed on the superimposed video from the captured image.

[Appendix 10]
The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. Processing to
A program for causing a computer to execute a process of displaying a superimposed video indicated by the superimposed video signal.

[Appendix 11]
A process of capturing a superimposed image displayed by the video display device according to any one of appendices 1 to 4 to acquire a captured image;
A program for causing a computer to execute processing of analyzing luminance of dots forming the captured image and reading superimposed data superimposed on the superimposed video from the captured image.

10 Projector 11 CPU
DESCRIPTION OF SYMBOLS 12, 102 Image | video display part 12A LED part 12B Display element 12C Lens part 2 Photographing machine 21 Key operation part 22 Camera part 23,202 Management part 24 Display part 25 Memory | storage part 100 Image | video display apparatus 101 Control part 200 Imaging apparatus 201 Acquisition part

Claims (10)

The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. A control unit,
A video display unit configured to display a superimposed video indicated by the superimposed video signal.   2. The control unit according to claim 1, wherein the control unit corrects the video signal so that the video is divided by a plurality of sections having a plurality of dots, and a blinking pattern in which the dots blink is changed in units of the sections. Video display device. The superimposition data is represented by a two-dimensional code,
The control unit associates each code dot of the two-dimensional code with each section, and corrects the video signal so that the blinking pattern of the section changes according to the code dot corresponding to the section. Item 3. The video display device according to Item 2.   The blinking pattern includes a first blinking pattern in which each dot in the section blinks, so that one of two adjacent dots in the section that are adjacent to each other is turned on and the other is turned off. The video display device according to claim 2, wherein the video display device has a second blinking pattern in which dots blink simultaneously. An acquisition unit that acquires the captured image by capturing the superimposed image displayed by the image display device according to claim 1;
And a management unit that analyzes luminance of dots forming the captured image and reads data for superimposition superimposed on the superimposed video from the captured image.   A video system comprising the video display device according to any one of claims 1 to 4 and the photographing device according to claim 5. The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. And
A display method for displaying a superimposed video indicated by the superimposed video signal. Shooting the superimposed video displayed by the video display device according to any one of claims 1 to 4 to obtain a captured image;
An information reading method for analyzing luminance of dots forming the captured image and reading superimposed data superimposed on the superimposed video from the captured image. The video signal is corrected so that dots forming the video corresponding to the video signal blink according to the superimposition data, and a superimposed video signal indicating the superimposed video in which the superposition data is superimposed on the video is generated. Processing to
A program for causing a computer to execute a process of displaying a superimposed video indicated by the superimposed video signal. A process of capturing a superimposed image displayed on the image display device according to claim 1 to acquire a captured image;
A program for causing a computer to execute processing of analyzing luminance of dots forming the captured image and reading superimposed data superimposed on the superimposed video from the captured image.

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