JP6381226B2 - Control device, control method, and program - Google Patents

Description

The present invention relates to a control device, a control method, and a program, and more particularly to a technique suitable for use in an image display system that prevents an image displayed in a visible state from being taken without permission.

  In various seminars and presentations such as products and technologies, it is common that presentations are performed while displaying information such as images and characters by projectors and displays. There is a case where a digital camera or a digital video camera is used as one means for the listener to record the contents of the presentation. Such shooting is a problem in terms of preventing unlimited distribution of disclosure information for the audience through the Internet and protecting the copyright of the displayed image.

  2. Description of the Related Art Conventionally, a method for irradiating an invisible light such as infrared light from a screen side to a photographer side has been proposed as a technique for preventing photographing of a copyright-protected image projected in a movie theater or the like (Patent Document 1). , Patent Document 2 and Patent Document 3). In this photographing prevention method, infrared light is irradiated from the back of the screen, is irradiated toward the screen and reflected on the screen, and is incident on a digital camera or digital video camera together with visible light. An image sensor mounted on a general digital camera or digital video camera has sensitivity to infrared light, and noise is added to the photographed image in a red color.

  Furthermore, a method has been proposed in which a specific person or a recording device (such as a digital camera) is allowed to take an image, and the other is prohibited from taking an image (patent). Reference 4). In this photographing prevention method, invisible light is incident on a digital camera or digital video camera together with visible light as in the above-described photographing prevention method, but a specific ID is defined for a specific person or recording device. And when this ID is recognized, imaging | photography is permitted by stopping irradiation of invisible light.

  Furthermore, a method for controlling the photographing apparatus so that only permitted objects can be photographed has been proposed (see Patent Document 5).

International Publication No. 2011/002059 JP 2009-282270 A JP 2008-300441 A JP 2004-364250 A JP 2006-41841 A

However, there are cases where it is not possible to effectively prevent display images from being captured.
For example, in the presentation, the shooting permission status differs depending on the display content, so that the shooting permission status differs. Therefore, in the method of irradiating invisible light, invisible light irradiation is performed according to the change in the shooting permission status. The device needs to be operated. Alternatively, the irradiation may be continued for the entire period of the presentation in order to omit the operation of the invisible light irradiation apparatus. In this case, even if the display content is permitted to be captured, it is not possible to capture the display.

In the method of controlling the photographing apparatus, it is necessary to incorporate in advance a control means for stopping photographing when photographing is not permitted in the photographing apparatus, and it is necessary to prevent bringing in a photographing apparatus that does not incorporate this.
The present invention has been made in view of the above-described problems, and an object of the present invention is to effectively prevent display images from being captured.

According to the present invention, an invisible light is irradiated to a specifying unit that specifies a photographing non-permitted region that does not permit photographing among image display regions by a display unit, and the photographing non-permitted region specified by the specifying unit. It has a control means for controlling the irradiating means of the invisible light so that the control means includes a first image, as different regions shooting disallowed region in the second image displayed next to the first image If specified, a period for irradiating the invisible light to both of the first and second imaging non-permitted areas is provided, and the image to be displayed is changed from the first image to the second image during that period. The irradiation unit and the display unit are controlled as described above .

  According to the present invention, it is possible to effectively prevent photographing of a display image.

1 is a block diagram illustrating an internal configuration of an image display system according to a first embodiment. It is an example of installation of the image display system concerning a 1st embodiment. It is another example of installation of the image display system according to the first embodiment. It is a flowchart explaining the control procedure of the image display system which concerns on 1st Embodiment. It is a figure which shows the area | region which refuses the image which concerns on 1st and 2nd embodiment, and imaging | photography. It is a figure which shows the display state of the image display surface which concerns on 1st and 2nd embodiment. It is a block diagram which shows the internal structure of the image display system which concerns on 2nd Embodiment. It is a figure which shows the example of installation of the image display system which concerns on 2nd Embodiment. It is a flowchart explaining the control procedure of the image display system which concerns on 2nd Embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described. First, an installation example of the image display system of this embodiment is shown in FIG. The image display system of this embodiment includes a projector 1 and an infrared light irradiation unit 2.
The projector 1 projects an image input from the outside via wired or wireless on an image display surface 3 such as a screen, a wall, or a whiteboard. Select a screen, wall, or whiteboard that reflects infrared light.

The infrared light irradiation unit 2 is configured by an infrared LED, an infrared laser, or the like, and irradiates at least part of the image display surface 3 with infrared light that is invisible light.
The image display surface 3 is a screen that displays an image projected by reflecting visible light and reflects infrared light. As long as visible light and infrared light are reflected on the surface, a wall or a whiteboard can be used instead.

Another example of installation is shown in FIG.
In the image display system shown in FIG. 3, when infrared light is transmitted from the back side of the image display surface 3 toward the surface, the infrared light irradiation unit 2 is installed on the back side of the image display surface 3 and is invisible. A certain infrared light may be applied to at least a part of the image display surface 3.

An example of the internal configuration of the image display system will be described with reference to FIG.
FIG. 1 is a block diagram showing an internal configuration of the image display system according to the present embodiment.
The projector 1 includes a data input unit 101, an information extraction unit 102, a memory 103, a projection unit 104, and a control unit 105.

The data input unit 101 is an interface for inputting data including images from an external device such as a personal computer or a video device to the image display system of the present embodiment. Here, an interface conforming to the HDMI (registered trademark) standard is used.
The information extraction unit 102 generates security information indicating permission or non-permission of photographing of the image.

The memory 103 is composed of a RAM or the like, and holds an image to be projected on the image display surface 3.
The projection unit 104 includes a liquid crystal that forms an image, a drive driver thereof, a projection lens, a drive system thereof, and a light source.
The control unit 105 is a processor, and controls the memory 103, the projection unit 104, and the infrared light irradiation unit 2 according to security information.

The detailed operation of each part of the image display system of this embodiment will be described below with reference to FIG.
FIG. 4 is a control flowchart of the image display system by the control unit 105 according to the present embodiment.
First, the operation when data including the image A is input as data to be displayed next from a personal computer or video equipment after the image display system is turned on and ready for projection will be described.

Image A is shown in FIG. Regions 6a and 6b in FIG. 5A are regions where photographing on the image A is not permitted.
The data input unit 101 receives data including an image by handshaking with an external device (S401). The image may be either a still image or a moving image updated at a constant cycle (for example, 60 Hz). The received data is sequentially output to the information extraction unit 102.

  The information extraction unit 102 generates security information indicating permission or non-permission of photographing in the image A, which is the next image, from the data including the image A (S402). An area in the image that is not permitted to be photographed by the security information is hereinafter referred to as a photographing unpermitted area.

  When searching for an image pattern that indicates that shooting is not permitted on the next image and generating security information based on the search results, characters such as CONFIDENCIAL (confidential) or specific pictures or shapes should not be permitted. The image pattern to be shown is registered in advance in the search dictionary. The image pattern may be a digital watermark that cannot be identified by the human eye.

  In addition, when generating security information from metadata indicating permission or non-permission of shooting, metadata indicating permission or non-permission of shooting is added to data including an image received by the data input unit 101 in advance. As an example of a method of adding metadata, there are a method of adding before and after image data or embedding it as an electronic watermark in an image.

  Security information is generated for each image and associated with each image. Security information is divided into regions, for example, areas that have a specific shape, such as a human face, or areas that are specified by coordinates are disallowed, while other areas are allowed to be captured. Are defined in You may define the permission or nonpermission of imaging | photography with respect to the whole image, without defining in an area unit.

  When the control unit 105 receives the security information of the image A, the control unit 105 compares the security information of the current image that is the current projection image before projecting the image associated with the security information by the projection unit 104. Perform (S403). Here, since the image A is the head projection image and there is no security information of the current image, the comparison results are regarded as not being the same. If they are not the same, the control unit 105 outputs a first infrared light irradiation command to the infrared light irradiation unit 2 (S405).

  The first infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to perform infrared light irradiation on the entire photographing non-permitted region in the current image and the whole photographing non-permitted region in the next image. . When there is no photographing non-permission area in the next image, the output of the first infrared light irradiation command may be omitted because it is not different from the photographing non-permission area in the current image.

Here, since the image A is the head projection image and the current image does not exist, that is, there is no photographing non-permitted region in the current image, the region 6a that is a photographing non-permitted region in the image A shown in FIG. The infrared light irradiation unit 2 becomes a command to irradiate the region 6b with infrared light. FIG. 6A shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command.
In FIG. 6A, 7a and 7b are infrared light irradiation regions. Since there is no image to be projected before the image A, there is no image on the image display surface 3 in FIG.

After the infrared light based on the first infrared light irradiation command is irradiated, the control unit 105 controls the projection unit 104 to read and project the image A, which is the next image, from the memory 103 (S406). The display state of the image display surface 3 after the projection of the image A is shown in FIG.
In FIG. 6B, the infrared light irradiation region 7a overlaps with a region 6a that is a non-permitted region for image A, and the infrared light irradiation region 7b overlaps with a region 6b that is a non-permitted region for image A.

  After the projection image is updated, the control unit 105 outputs a second infrared light irradiation command to the infrared light irradiation unit 2 (S407). The second infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to perform infrared light irradiation on the imaging non-permitted region in the updated projection image. The display state of the image display surface 3 after the infrared light irradiation according to the second infrared light irradiation command is the same as that in FIG. 6B until this step is executed.

When there is no photographing non-permitted area in the updated projection image, a command to stop infrared light irradiation is given. Here, the image A which is the updated projection image is the head projection image, and the second infrared light irradiation command and the first infrared light irradiation command are commands for instructing infrared light irradiation to the same region. Therefore, the output of the second infrared light irradiation command may be omitted.
After outputting the second infrared light irradiation command, the control unit 105 determines whether there is next data (S408).

Next, an operation when the same data as the image A is input as the next data of the image A will be described.
Since there is data including image A as the next data, this is input (S401).
Next, security information is generated (S402) and compared with the security information of the current image, which is the current projection image (S403). Here, both the current image and the next image are the image A, and the security information is the same.

If they are identical, the control unit 105 controls the projection unit 104 to read and project the next image from the memory 103 (S404). Here, since the irradiation area of the infrared light irradiation unit 2 is the same as that for the previous image, it is assumed that the infrared light irradiation command is not issued. An external light irradiation command may be output.
After the projection, the control unit 105 determines whether there is next data (S408).

Next, an operation when the image B data is input as the next data of the image A will be described.
Image B is shown in FIG. Reference numerals 6c and 6d in FIG. 5B denote areas where photographing on the image B is not permitted.
Since there is data including the image B as the next data, this is input (S401). Next, security information is generated (S402) and compared with the security information of the current image, which is the current projection image (S403). Here, the current image is image A, the next image is image B, and the security information is not the same.

  If they are not the same, the control unit 105 outputs a first infrared light irradiation command to the infrared light irradiation unit 2 (S405). When the first infrared light irradiation command is received, the infrared light irradiation unit 2 applies the infrared light irradiation unit 2 to the entire imaging non-permitted region and the next image non-permitted region in the current image. Irradiate light.

FIG. 6C shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command when it is assumed that the image B is the top image.
In FIG. 6C, 7c and 7d are infrared light irradiation regions. The infrared light irradiation area 7c overlaps with 6c, which is a non-permitted area for image B, and the infrared light irradiation area 7d overlaps with 6d, a non-permitted area for image B.

  However, since the current image is the image A and it is necessary to continue the infrared light irradiation to the imaging non-permission area in the image A, the first infrared light irradiation command is applied to both the image A and the image B. The command is to irradiate the corresponding infrared light irradiation area. FIG. 6D shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command.

  In FIG. 6D, 7e is an infrared light irradiation region, which is equal to the sum of the infrared light irradiation regions 7a and 7c. 7b is the same infrared light irradiation region as in FIG. 6B, and 7d is the same as that in FIG. 6C. Compared with the display state of FIG. 6B before execution of this step, the projected image remains as image A, but the infrared light irradiation region changes.

After the infrared light based on the first infrared light irradiation command is irradiated, the control unit 105 controls the projection unit 104 to read and project the next image B from the memory 103 (S406). That is, a period in which either one or both of the image A to be displayed first and the image B to be displayed later or both are irradiated with invisible light is provided, and the image to be displayed is displayed in the previous image A. To the next image B. A display state of the image display surface 3 after the image B is projected is shown in FIG.
In FIG. 6E, the infrared light irradiation area 7e overlaps with the image B photographing non-permission area 6c, and the infrared light irradiation area 7d overlaps with the image B photographing non-permission area 6d. Compared with the display state of FIG. 6D before execution of this step, the infrared light irradiation area is not changed, but the projection image is updated to the image B.

  After the projection image is updated, the control unit 105 outputs a second infrared light irradiation command to the infrared light irradiation unit 2 (S407). The second infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to perform infrared light irradiation on the imaging non-permitted region in the updated projection image. FIG. 6F shows a display state of the image display surface 3 after the infrared light irradiation according to the second infrared light irradiation command.

In FIG. 6F, the infrared light irradiation area 7c overlaps 6c, which is a non-permitted area for image B, and the infrared light irradiation area 7d overlaps 6d, which is a non-permitted area for image B. Compared with the display state of FIG. 6E before the execution of this step, the infrared light irradiation region changes. When there is no photographing non-permitted area in the updated projection image, a command to stop infrared light irradiation is given.
After outputting the second infrared light irradiation command, the control unit 105 determines whether there is next data (S408).

Next, the operation when there is no next data will be described.
If there is no next data, the control unit 105 stops the projection operation of the projection unit 104 (S409).
After the projection operation is stopped, the control unit 105 outputs an infrared light irradiation stop command to the infrared light irradiation unit 2 to stop the infrared light irradiation (S410). The infrared light irradiation stop command has the same operation content as that of the first infrared light irradiation command and the second infrared light irradiation command when the infrared light irradiation region does not exist in the infrared light irradiation unit 2. It is an instruction to instruct.

  As described above, in the present embodiment, when the display content is changed, invisible light irradiation is performed on a region where photographing is not permitted in either one or both of the images displayed before and after the change. Control to do. Thereby, invisible light irradiation can be accurately performed to a region where photographing is not permitted.

  In the present embodiment, the projection unit 104 of the projector 1 has been described as projecting onto the image display surface 3. However, the projector 1 is a display, the projection unit 104 is a liquid crystal panel, the image display surface 3 is a display screen, You may apply to what is displayed on. Moreover, you may apply to the apparatus which can be displayed as another visible image.

In this embodiment, although the infrared light irradiation part 2 demonstrated as what irradiates infrared light, you may irradiate through a visible light cut filter using the light source which outputs both infrared light and visible light. .
In the present embodiment, the infrared light irradiation unit 2 has been described as a separate housing from the projector 1, but may be configured in the same housing.

In the present embodiment, the infrared light irradiation unit 2 has been described as irradiating infrared light from the front surface or the back surface of the image display surface 3. You may irradiate from the side and other directions.
In the present embodiment, infrared light is used as invisible light, but other invisible light such as ultraviolet light may be used.

  In this embodiment, the description has been given on the assumption that HDMI is used as an interface for connecting a personal computer or video equipment to the image display system. However, the present invention is not limited to a specific interface, and other wired or wireless communication may be used. Good.

  In the present embodiment, when metadata indicating permission or non-permission of shooting is given as input to the projector 1 with the same interface as the image, the metadata and the image are input using different interfaces. You may comprise.

In this embodiment, the security information has been described as information indicating permission or disapproval of image shooting. However, permission or disapproval of image display is also indicated, and when image display is not permitted, You may be made not to perform both a display and irradiation of the infrared light with respect to it.
In the present embodiment, the imaging non-permission area and the infrared light irradiation area are described as the same area, but the infrared light irradiation area may be larger than the imaging non-permission area.

(Second Embodiment)
An installation example of the image display system of this embodiment is shown in FIG. The image display system includes a computer 4, a display 5, and an infrared light irradiation unit 2.
The computer 4 is a personal computer, and can execute processing defined by the program by executing the program. If the program defines the generation of an image, the image is generated.

The display 5 displays an image input from the outside via wired or wireless on the image display surface 3.
The infrared light irradiation unit 2 is configured by an infrared LED, an infrared laser, or the like, and irradiates at least part of the image display surface 3 with infrared light that is invisible light.

  The image display surface 3 is composed of a liquid crystal panel, a cathode ray tube, or the like, and displays a visible light image. An image display surface 3 having a property of reflecting infrared light is used. Alternatively, a filter that transmits visible light and reflects infrared light is installed on the front surface of the image display surface 3.

The internal configuration of the image display system will be described with reference to FIG.
FIG. 7 is a block diagram showing an internal configuration of the image display system according to the present embodiment.
The computer 4 includes a data storage unit 501, a memory 103, a data output unit 502, and a control unit 105.

The data storage unit 501 includes a hard disk or a memory, and stores a program executed by the control unit 105, an image file, a document file, and the like.
The memory 103 is composed of a RAM or the like and holds an image output to the display 5 for display.

  The data output unit 502 is an interface that outputs data including an image from the image display system to the display 5. Here, it outputs to the display 5 using the interface based on HDMI specification.

  The control unit 105 is a processor, and controls the data storage unit 501, the memory 103, the data output unit 502, and the infrared light irradiation unit 2. Then, an image to be read out from the data storage unit 501 and output to the display 5 and security information indicating permission or non-permission of photographing of the image are generated.

The detailed operation of each part of the image display system of this embodiment will be described below with reference to FIG. FIG. 9 is a control flowchart of the image display system by the control unit 105 according to the present embodiment.
First, the operation when the image display system is turned on and the image A is output to the display 5 will be described. Image A is shown in FIG. Reference numerals 6a and 6b in FIG. 5A denote areas where photographing on the image A is not permitted.

  The control unit 105 reads and executes the program from the data storage unit 501 and determines whether it is the start of the image output process (S901). If the image output process is not started, the program is further executed or a new program is read and executed.

  When the image output process is started, the control unit 105 determines whether or not the output image needs to be updated (S902). Here, there is no current image that is the current output image, and since image A is newly output as the next image, it is determined that the output image needs to be updated.

  When the output image needs to be updated, the control unit 105 generates the image A that is the next image based on the execution result of the program, and indicates permission or disapproval of shooting in the image A that is the next image. Security information is generated (S903). An area in the image that is not permitted to be photographed by the security information is hereinafter referred to as a photographing unpermitted area.

  When searching for an image pattern that indicates that photography is not permitted on the next image and generating security information based on the search results, characters such as CONFIDENCIAL or a specific picture or shape are used, and image patterns that indicate that photography is not permitted. And is registered in the search dictionary in advance. The image pattern may be a digital watermark that cannot be identified by the human eye.

  In addition, when generating security information from metadata indicating permission or disapproval of shooting, metadata indicating permission or disapproval of shooting is previously assigned to an image file or text file read by the program being executed. As an example of a method for assigning metadata, there is a method for attaching to a file as binary data or embedding it as an electronic watermark in an image.

  Security information is generated for each image and associated with each image. Security information is divided into regions, for example, areas that have a specific shape, such as a human face, or areas that are specified by coordinates are disallowed, while other areas are allowed to be captured. Are defined in You may define the permission or nonpermission of imaging | photography with respect to the whole image, without defining in an area unit.

  When generating the image A and its security information, the control unit 105 outputs a first infrared light irradiation command to the infrared light irradiation unit 2 before outputting the image A to the data output unit 502 (S904). The first infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to execute infrared light irradiation on the entire photographing non-permitted region in the current image and the whole photographing non-permitted region in the next image.

  When there is no photographing non-permission area in the next image, the output of the first infrared light irradiation command may be omitted because it is not different from the photographing non-permission area in the current image. Here, since the image A is the first output image and the current image does not exist, that is, there is no photographing non-permitted region in the current image, the photographing non-permitted regions 6a and 6b in the image A shown in FIG. In response to this, the infrared light irradiating unit 2 gives a command to irradiate infrared light.

FIG. 6A shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command.
In FIG. 6A, 7a and 7b are infrared light irradiation regions. Since there is no image to be output before the image A, there is no image on the image display surface 3 in FIG.

After the infrared light based on the first infrared light irradiation command is irradiated, the control unit 105 controls the data output unit 502 to read and output the image A that is the next image from the memory 103 (S905). . The display state of the image display surface 3 after the output of the image A is shown in FIG.
In FIG. 6B, the infrared light irradiation area 7 a overlaps the image A imaging non-permission area 6 a and the infrared light irradiation area 7 b overlaps the image A imaging non-permission area 6 b.

  After the output image is updated, the control unit 105 outputs a second infrared light irradiation command to the infrared light irradiation unit 2 (S906). The second infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to perform infrared light irradiation on the imaging non-permitted region in the updated output image. The display state of the image display surface 3 after the infrared light irradiation according to the second infrared light irradiation command is the same as that in FIG. 6B until this step is executed.

  If there is no photographing non-permission area in the updated output image, an instruction to stop infrared light irradiation is given. Here, the updated output image A is the first output image, and the second infrared light irradiation command and the first infrared light irradiation command are commands for instructing infrared light irradiation to the same region. Therefore, the output of the second infrared light irradiation command may be omitted. After outputting the second infrared light irradiation command, the control unit 105 determines whether or not the image output process is finished (S907).

Next, an operation when the image A is continuously output will be described.
If the image output process is not completed in step S907, the control unit 105 determines whether it is necessary to update the output image (S902). Since the output image remains as image A, the next image generation, security information generation, output image update, and infrared light irradiation command output are not performed.
After determining that the update of the output image is not necessary, the control unit 105 determines whether or not the image output process is finished (S907).

Next, an operation when the image B is output to the display 5 as the next image of the image A will be described. Image B is shown in FIG. Reference numerals 6c and 6d in FIG. 5B denote areas where photographing on the image B is not permitted.
If the image output process is not completed in S907, the control unit 105 determines whether or not the output image needs to be updated (S902). Since the image B is output as the next image, it is determined that the output image needs to be updated.

  When the output image needs to be updated, the control unit 105 generates the image B that is the next image based on the execution result of the program, and security indicating permission or disapproval of shooting of the image B that is the next image. Information is generated (S903).

  After generating the image B and its security information, the control unit 105 outputs a first infrared light irradiation command to the infrared light irradiation unit 2 before outputting the image B to the data output unit 502 (S904). When the first infrared light irradiation command is received, the infrared light irradiation unit 2 applies the infrared light irradiation unit 2 to the entire imaging non-permitted region and the next image non-permitted region in the current image. Irradiate light.

FIG. 6C shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command when it is assumed that the image B is the top image.
In FIG. 6C, 7c and 7d are infrared light irradiation regions. The infrared light irradiation area 7c overlaps 6c, which is a non-permitted area for image B, and the infrared light irradiation area 7d overlaps 6d, which is a non-permitted area for image B.

  However, since the current image is the image A and it is necessary to continue the infrared light irradiation to the imaging non-permission area in the image A, the first infrared light irradiation command is applied to both the image A and the image B. The command is to irradiate the corresponding infrared light irradiation area. FIG. 6D shows the display state of the image display surface 3 after the infrared light irradiation according to the first infrared light irradiation command.

  In FIG. 6D, 7e is an infrared light irradiation region, which is equal to the sum of the infrared light irradiation regions 7a and 7c. 7b is the same infrared light irradiation region as in FIG. 6B, and 7d is the same as that in FIG. 6C. Compared with the display state of FIG. 6B before execution of this step, the display image remains the image A, but the infrared light irradiation region changes.

  After the infrared light based on the first infrared light irradiation command is irradiated, the control unit 105 controls the data output unit 502 to read and output the image B as the next image from the memory 103 (S905). . The display state of the image display surface 3 after the output of the image B is shown in FIG. In FIG. 6E, the infrared light irradiation area 7e overlaps with the image B photographing non-permission area 6c, and the infrared light irradiation area 7d overlaps with the image B photographing non-permission area 6d. Compared with the display state of FIG. 6D before execution of this step, the infrared light irradiation area is not changed, but the display image is updated to the image B.

  After the output image is updated, the control unit 105 outputs a second infrared light irradiation command to the infrared light irradiation unit 2 (S906). The second infrared light irradiation command is a command for causing the infrared light irradiation unit 2 to perform infrared light irradiation on the imaging non-permitted region in the updated output image. FIG. 6F shows a display state of the image display surface 3 after the infrared light irradiation according to the second infrared light irradiation command.

In FIG. 6F, the infrared light irradiation area 7c overlaps 6c, which is a non-permitted area for image B, and the infrared light irradiation area 7d overlaps 6d, which is a non-permitted area for image B. Compared with the display state of FIG. 6E before the execution of this step, the infrared light irradiation region changes. If there is no photographing non-permission area in the updated output image, an instruction to stop infrared light irradiation is given.
After outputting the second infrared light irradiation command, the control unit 105 determines whether or not the image output process is finished (S907).

Next, the operation when there is no next data will be described.
If there is no next data, the control unit 105 stops the output operation of the data output unit 502 (S908).
After the output operation is stopped, the control unit 105 outputs an infrared light irradiation stop command to the infrared light irradiation unit 2 to stop the infrared light irradiation (S909). The infrared light irradiation stop command has the same operation content as that of the first infrared light irradiation command and the second infrared light irradiation command when the infrared light irradiation region does not exist in the infrared light irradiation unit 2. It is an instruction to instruct.

  In the present embodiment, the data output from the data output unit 502 of the computer 4 has been described as being displayed on the image display surface 3 by the display 5. However, the display 5 is displayed as a projector and the image display surface 3 is displayed as a projection area of the projector. You may apply to what you do. Moreover, you may apply to the apparatus which can be displayed as another visible image.

In this embodiment, although the infrared light irradiation part 2 demonstrated as what irradiates infrared light, you may irradiate through a visible light cut filter using the light source which outputs both infrared light and visible light. .
In the present embodiment, the infrared light irradiation unit 2 has been described as being a separate housing from the computer 4, but may be configured in the same housing.

  In the present embodiment, the infrared light irradiating unit 2 has been described as irradiating infrared light from the front surface of the image display surface 3. You may irradiate from other directions. When the display 5 is provided with a front light or a backlight, infrared light may be irradiated together with visible light.

In the present embodiment, infrared light is used as invisible light, but other invisible light such as ultraviolet light may be used.
In this embodiment, the security information has been described as information indicating permission or disapproval of image shooting. However, permission or disapproval of image output is also indicated, and when image output is not permitted, You may be made not to perform both an output and irradiation of the infrared light with respect to it.
In the present embodiment, the imaging non-permission area and the infrared light irradiation area are described as the same area, but the infrared light irradiation area may be larger than the imaging non-permission area.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (computer program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various computer-readable storage media. Then, the computer (or CPU, MPU, etc.) of the system or apparatus reads out and executes the program.

DESCRIPTION OF SYMBOLS 1 Projector 2 Infrared light irradiation part 3 Image display surface 4 Computer 5 Display 101 Data input part 102 Information extraction part 103 Memory 104 Projection part 105 Control part

Claims (10)

Of the image display area by the display means, a specifying means for specifying a photographing non-permitted area that prohibits photographing,
Have a control means for controlling the irradiating means of the invisible light so that the visible light is irradiated to the identified said imaging disallowed regions by the specifying means,
When a different area is identified as a non-permitted area in the first image and a second image displayed next to the first image, the control unit does not permit the photographing of both the first and second images. Providing a period for irradiating the region with the invisible light, and controlling the irradiation unit and the display unit so as to change the image to be displayed from the first image to the second image .
A control device characterized by that. Of the image display area by the display means, a specifying means for specifying a photographing non-permitted area that prohibits photographing,
Control means for controlling the invisible light irradiation means so that invisible light is emitted to the imaging non-permission area specified by the specifying means,
The control unit controls the irradiation unit and the display unit so that the irradiation of the invisible light is stopped after the display of the image including the imaging non-permission region is stopped.
A control device characterized by that. Of the image display area by the display means, a specifying means for specifying a photographing non-permitted area that prohibits photographing,
Control means for controlling the invisible light irradiation means so that invisible light is emitted to the imaging non-permission area specified by the specifying means,
The control means controls the irradiation means so that invisible light is irradiated to the photographing non-permitted area before displaying the image including the photographing non-permitted area specified by the specifying means.
A control device characterized by that. The specifying means specifies the photographing non-permission area based on a predetermined image pattern detected from an image to be displayed in the image display area;
The control device according to claim 1, wherein the control device is a control device. The specifying unit specifies the photographing non-permitted region based on metadata of an image to be displayed in the image display region;
The control device according to claim 1, wherein the control device is a control device. The display means is a projection means for projecting an image on the image display area.
The control apparatus according to any one of claims 1 to 5 , wherein Of the image display area by the display means, a specific step of specifying a photographing non-permitted area that prohibits photographing,
A control step of controlling the invisible light irradiation means so that the invisible light is irradiated to the specified non-permitted region ,
In the control step, when a different region is specified as a photographing non-permitted region in the first image and the second image displayed next to the first image, photographing of both the first and second images is not permitted. Providing a period for irradiating the region with the invisible light, and controlling the irradiation unit and the display unit so as to change the image to be displayed from the first image to the second image.
A control method characterized by that. Of the image display area by the display means, a specific step of specifying a photographing non-permitted area that prohibits photographing,
A control step of controlling the invisible light irradiation means so that the invisible light is irradiated to the specified non-permitted region,
In the control step, after the display of the image including the imaging non-permission area is stopped, the irradiation unit and the display unit are controlled so that the irradiation of the invisible light is stopped.
A control method characterized by that. Of the image display area by the display means, a specific step of specifying a photographing non-permitted area that prohibits photographing,
A control step of controlling the invisible light irradiation means so that the invisible light is irradiated to the specified non-permitted region,
In the control step, the irradiation unit is controlled so that invisible light is irradiated to the photographing non-permitted region before displaying the image including the specified photographing non-permitted region.
A control method characterized by that.   The program for operating a computer as a control apparatus of any one of Claims 1-6.

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