JP2012159765A - Image projection device, image projection method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image projection device, an image projection method, and a program capable of substantially securing security.SOLUTION: An image projection device 10 includes: a memory for storing a first image that is not projected; an image acquiring section 12 acquiring a second image to be projected; an image comparing section 14 for comparing the first image and the second image; a projection image creating section 15 that, when at least a partial region of the second image is accorded with the first image as the result of the image comparing section 14, processes the second image so as not to project the partial region of the second image which is accorded with the first image, and creates a projection image; and a projecting section 16 for projecting the projection image created by the projection image creating section 15.

Description

  The present invention relates to an image projection apparatus, an image projection method, and a program.

  2. Description of the Related Art Conventionally, a technique is known in which an image displayed on a terminal device such as a PC (Personal Computer) is transferred to a projector and projected by the projector. For example, Patent Document 1 discloses a projection system using a PC and a projector.

  Here, when the PC is not operated for a certain period during projection by the projector, the screen saver is activated and the PC is locked. In order to unlock the PC, it is necessary to input a user ID, a password, and the like. However, since the PC is connected to the projector, an input screen for the user ID and password is also projected by the projector. This is not preferable from the viewpoint of ensuring security.

  Patent Document 1 discloses a technique for preventing a PC from being locked by transmitting a control signal for suppressing activation of a screen saver from a projector to the PC.

  However, although the technique disclosed in Patent Document 1 can prevent the PC from being locked due to activation of the screen saver, for example, when the PC is first turned on with the projector and the PC connected, the PC is logged off. In such a case, and when the PC is restarted, a user ID or password input screen is projected by the projector. Therefore, there is a problem that sufficient security cannot be ensured.

  The present invention has been made in view of the above, and an object of the present invention is to provide an image projection apparatus, an image projection method, and a program capable of sufficiently ensuring security.

  In order to solve the above-described problems and achieve the object, an image projection apparatus of the present invention stores a storage unit that stores a first image, an image acquisition unit that acquires a second image to be projected, and the storage unit. An image comparison unit that compares the first image that has been obtained and the second image acquired by the image acquisition unit; and a result of comparison by the image comparison unit, as a result of at least a portion of the second image A projection image creating unit that creates a projection image by processing the second image so that a region matching the first image of the second image is not projected when the image matches the first image; A projection unit that projects the projection image created by the projection image creation unit.

  In the image projecting method of the present invention, the first step of acquiring the second image to be projected, the first image stored in the storage unit, and the second image acquired in the first step are compared. If at least a part of the second image matches the first image as a result of the comparison between the two steps and the second step, the region of the second image that matches the first image A third step of processing the second image so as not to be projected and generating a projection image, and a fourth step of projecting the projection image generated in the third step. And Furthermore, a program according to the present invention is a program that causes a computer to execute the image projection method.

  According to the present invention, when at least a part of the region of the second image to be projected matches the first image, the second image is projected so that the region of the second image that matches the first image is not projected. Since the projection image is processed, the first image is not projected, and there is an advantageous effect that sufficient security can be secured.

FIG. 1 is a block diagram illustrating an example of a schematic configuration of an image projection system according to an embodiment. FIG. 2 is a block diagram illustrating an example of a functional configuration of the image projection apparatus. FIG. 3 is a flowchart illustrating an example of a processing procedure for registering the first image. FIG. 4 is a diagram for explaining an example of a region where projection is not performed. FIG. 5 is a flowchart showing an example of a series of processing operations of the image projection system. FIG. 6 is a diagram for explaining an example of a method for preventing the first image from being projected. FIG. 7 is a block diagram illustrating a hardware configuration example of the image projection apparatus.

<Embodiment>
Hereinafter, an embodiment of an image projection device, an image projection method, and a program according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram illustrating an example of a schematic configuration of an image projection system 100 according to the present embodiment. As shown in FIG. 1, the image projection system 100 includes an image projection device 10, a terminal device 20, and a server device 30.

  The image projection device 10 is means for projecting an input image on a screen (not shown) or the like. An example of the image projector 10 is a projector. As shown in FIG. 1, the image projection device 10 can be connected to a terminal device 20 such as a PC via an image signal transmission cable 40. Further, the image projection device 10 can be connected to the server device 30 via a network 50 such as the Internet. The server device 30 is a means capable of holding various electronic contents such as images and music.

  FIG. 2 is a block diagram illustrating an example of a functional configuration of the image projection apparatus 10. As shown in FIG. 2, the image projection apparatus 10 includes an input reception unit 11, an image acquisition unit 12, a first image registration unit 13, an image comparison unit 14, a projection image creation unit 15, and a projection unit 16. With.

  The input receiving unit 11 receives an input by a user operation. In the present embodiment, security button ON / OFF setting information, information indicating a network connection destination and content to be acquired, output setting (for example, setting of gradation and color) by various button (not shown) operations of the user. Information indicating the contents of the image is input to the image projection apparatus 10.

  The image acquisition unit 12 acquires an image to be projected (referred to as a “second image”). As shown in FIG. 2, the image acquisition unit 12 includes an image transmission / reception unit 17 and a network control unit 18.

  The image transmission / reception unit 17 transmits / receives image data to / from the terminal device 20. The image transmission / reception unit 17 can receive image data transmitted from the terminal device 20 via the image signal transmission cable 40, and can also receive image data generated by the image projection device 10 via the image signal transmission cable 40. Can also be transmitted to the terminal device 20.

  The network control unit 18 controls communication with the server device 30 via the network. Under the control of the network control unit 18, predetermined image data (content image) held in the server device 30 can be acquired. The above-mentioned “second image” includes image data (image data from the terminal device 20) received by the image transmission / reception unit 17 and image data (content image) acquired by control of the network control unit 18. .

  The first image registration unit 13 registers an image that is not projected (referred to as a “first image”) in a memory (not shown). In the present embodiment, the memory that holds the first image is provided in the image projection apparatus 10, but the present invention is not limited thereto, and for example, a memory that holds the first image is provided in the terminal apparatus 20. Also good. Further, the type and number of the first images held (registered) in the memory are arbitrary. For example, two or more types of first images may be registered in the memory, or only one type of first image may be registered in the memory.

  The image comparison unit 14 compares the second image acquired by the image acquisition unit 12 with the first image registered in a memory (not shown) by the first image registration unit 13. In the present embodiment, the image comparison unit 14 compares the second image and the first image each time the second image acquired by the image acquisition unit 12 is switched (every time a new second image is acquired). Do.

  The projection image creation unit 15 matches the first image of the second image when at least a part of the second image matches the first image as a result of the comparison by the image comparison unit 14. The projection image is created by processing the second image so that the region is not projected. In the present embodiment, an image different from the first image is superimposed on an area matching the first image in the second image, and the superimposed image is received according to the output setting received by the input receiving unit 11. A projection image is created by adjusting various parameters (gradation, color, etc.) of the image.

  On the other hand, as a result of the comparison by the image comparison unit 14, if there is no region that matches the first image in the second image, the projection image creation unit 15 performs the input without processing the second image. According to the output setting received by the receiving unit 11, various parameters of the second image are adjusted to create a projection image. The projection image creation unit 15 supplies the projection image created as described above to the projection unit 16. Then, the projection unit 16 projects the projection image created by the projection image creation unit 15.

  Note that the image comparison unit 14 according to the present embodiment performs the above-described comparison when the input reception unit 11 receives an input for setting the security function on, while receiving an input for setting the security function off. Does not make the above comparison. Therefore, when the security function is off, the projection image creating unit 15 projects the second image without modifying the second image even if the region matching the first image exists in the second image. For example, an image for use is created.

  FIG. 3 is a flowchart illustrating an example of a processing procedure for registering the first image before the use of the image projection system 100 according to the present embodiment is started. As shown in FIG. 3, the user first connects the image projection device 10 and the terminal device 20 with the image signal transmission cable 40 (step S1). Next, the user displays a setting screen for registering the first image on the display screen of the terminal device 20 by pressing a menu button (not shown) provided in the image projection device 10 (step S2). ). More specifically, the image projection device 10 generates an image of a setting screen for registering the first image in response to a user's operation of a menu button. The image transmission / reception unit 17 transmits the generated setting screen image to the terminal device 20. The terminal device 20 displays the image of the setting screen received from the image transmission / reception unit 17 on the display screen. In the present embodiment, the setting screen is displayed on the display screen of the terminal device 20. However, the present invention is not limited to this, and the setting screen may be projected on a screen (not shown), for example.

  Next, in response to a user operation, the terminal device 20 transmits an image of a screen including an image that is not projected (“entire image”) to the image projection device 10 (step S3). For example, as shown in FIG. 4, the entire image of the login screen including an image indicating a user ID or password input field is transmitted to the image projector 10. After step S <b> 3, the terminal device 20 accepts designation of a region that is not projected in the entire image in accordance with a user operation (step S <b> 4), and transmits the accepted information to the image projection device 10. For example, as shown in FIG. 4, an area S including a user ID or password input field is specified on the login screen. At this time, the coordinate data of each vertex for determining the position and size of the area where the projection is not performed is input to the terminal device 20 and transmitted to the image projection device 10. Note that the range of the area where projection is not performed can be arbitrarily set, and the entire screen can be designated as the area where projection is not performed, or a part of the area of the screen can be designated. .

  After step S4, the first image registration unit 13 of the image projection device 10 rejects the image within the region specified in step S4 described above as the first image that is not projected from the entire image received from the terminal device 20. It registers in the illustrated memory (step S5). After step S5, the user determines whether or not an unregistered first image exists (step S6). If an unregistered first image exists, the user returns to step S2 described above. On the other hand, when there is no unregistered first image, a series of processing ends.

  Next, a series of processing operations when the use of the image projection system 100 is started in a state where the processing of FIG. 3 is completed will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a series of processing operations of the image projection system 100. As shown in FIG. 5, first, the user operates a predetermined button provided on the image projection device 10 to enable the security function of the image projection device 10 ("ON") (step S7). .

  Next, the user presses a menu button (not shown) provided on the image projection device 10 to display a setting screen for performing various settings of the projection image on the display screen of the terminal device 20 ( Step S8). More specifically, the image projection apparatus 10 generates an image of a setting screen for performing various settings of the projection image in accordance with the user's operation of the menu button. The image transmission / reception unit 17 transmits the generated setting screen image to the terminal device 20. The terminal device 20 displays the image of the setting screen received from the image transmission / reception unit 17 on the display screen. Here, the setting screen is displayed on the display screen of the terminal device 20. However, the present invention is not limited to this, and the setting screen may be projected onto a screen (not shown), for example. Next, the user performs detailed settings by operating the terminal device 20 (step S9). The detailed setting includes a setting of a comparison method between the first image and the second image, a setting of a method that does not project the first image, and the like.

  After step S9, the user connects the image projection device 10 and the terminal device 20 with the image signal transmission cable 40 (step S10). After step S10, the terminal device 20 transmits an image to be projected (second image) to the image projection device 10 in accordance with a user operation (step S11).

  After step S11, the image comparison unit 14 of the image projection device 10 compares the second image received from the terminal device 20 with the first image held (registered) in a memory (not shown) (step S12). Then, it is determined whether or not they match (step S13). When a plurality of types of first images are registered in the memory, the image comparison unit 14 compares each of the plurality of types of first images registered in the memory with the second image to determine whether or not they match. Determine whether.

  As a result of step S13, if the image comparison unit 14 determines that at least a part of the second image matches the first image, the projection image creation unit 15 of the image projection apparatus 10 The image is processed (synthesized) to create a projection image (step S14). More specifically, the projection image creation unit 14 creates a projection image by superimposing an image different from the first image on an area that matches the first image in the second image.

  As an example, the user ID and password input field image in the area S shown in FIG. 4 is registered as a first image in a memory (not shown), and the image projection apparatus 10 uses the user ID and password in the area S shown in FIG. Assume that the image data of the login screen including the same image as the image in the input field is received from the terminal device 20 as the second image. In this case, as shown in FIG. 6, the image projection apparatus 10 superimposes (combines) the painting image on the area S ′ that matches the image in the area S shown in FIG. 4 in the login screen. This is only an example, and a method for preventing the first image from being projected is arbitrary. For example, an image for blurring can be used instead of the image for filling. The user can select various methods in step S9 described above.

  On the other hand, as a result of step S13 described above, when the image comparison unit 14 determines that there is no region that matches the first image in the second image, the projection image creation unit 15 of the image projection device 10 is used. Creates a projection image without processing (synthesizing) the second image (step S15).

  Subsequently, the process proceeds to step S16. In step S16, the projection unit 16 of the image projection apparatus 10 projects the projection image created in step S14 or step S15. The processes in steps S12 to S16 described above are image projection processes executed by the image projection apparatus 10. After step S16, the process proceeds to step S17. In step S17, the user determines whether or not all the second images have been projected. If the user determines that all the second images have been projected, the series of processes ends. On the other hand, if it is determined that there is a second image that has not yet been projected, the process returns to step S11 described above.

  FIG. 7 is a diagram illustrating a hardware configuration example of the image projection apparatus 10. As shown in FIG. 7, the image projection apparatus 10 includes a first interface unit 101, an operation input unit 102, a second interface unit 103, an image forming unit 104, a storage unit 105, an image projection unit 106, CPU 107 are connected to each other via a bus B.

  The first interface unit 101 is means for connecting the image projection apparatus 10 to the network 50. The operation input unit 102 is a means for inputting various operation signals to the image projection apparatus 10 and includes operation buttons and the like. The second interface unit 103 is means for connecting the image signal transmission cable 40 to the image projection apparatus 10.

  The image forming unit 104 is a unit that performs an image forming operation, and forms a projection image. The storage unit 105 is a unit that stores various programs executed by the image projection apparatus 10 and various data (first image and the like). The image projection unit 106 is a unit that projects the projection image formed by the image forming unit 104. The CPU 107 controls the entire image projection apparatus 10 by executing various programs stored in the storage unit 105.

  Note that a control program executed by the image projection apparatus 10 according to the present embodiment is provided by being incorporated in advance in a storage memory of the storage unit 105. The control program executed by the image projection apparatus 10 is an installable or executable file and can be read by a computer such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk). It may be configured to be recorded on a simple storage medium.

  Further, the control program executed by the image projection apparatus 10 may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. The control program executed by the image projection apparatus 10 may be provided or distributed via a network such as the Internet.

  The control program executed by the image projection apparatus 10 includes the above-described units (the input reception unit 11, the image acquisition unit 12, the first image registration unit 13, the image comparison unit 14, the projection image creation unit 15, and the projection unit 16). It has a module configuration for implementation on a computer. As actual hardware, the CPU 107 reads out the control program from the storage memory of the storage unit 105 onto the expansion memory of the storage unit 105 and executes it, whereby the above-described units are realized on a computer.

  The terminal device 20 according to the present embodiment includes a control device such as a CPU, an internal storage device such as a ROM (Read Only Memory) and a RAM, an external storage device such as an HDD, SSD, and a removable drive device, and a liquid crystal display. And a display device such as a keyboard and a mouse, and has a hardware configuration using a normal computer.

<Action and effect>
As described above, according to the present embodiment, when at least a part of the second image to be projected matches the first image stored in the memory in advance, Since the projection image in which the second image is processed so as not to project the region that coincides with the first image is created, there is an advantageous effect that the first image is not projected in any case. Play. Therefore, according to the present embodiment, sufficient security can be ensured compared to the conventional case.

<Modification>
As mentioned above, although embodiment which concerns on this invention was described, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the summary of this invention, various deformation | transformation are possible. For example, in the above-described embodiment, the image comparison unit 14 compares the second image with the first image every time the second image acquired by the image acquisition unit 12 is switched. For example, the image comparison unit 14 can compare the second image and the first image every time a certain period elapses. In addition, the user can select any one of the above-described comparison method and the comparison method described in the embodiment.

  In the above-described embodiment, the predetermined first image is registered in the memory by performing the process in FIG. 3. However, the present invention is not limited to this, for example, without performing the process in FIG. 3. A configuration may be employed in which a predetermined first image is registered in advance in a memory at the time of manufacturing.

DESCRIPTION OF SYMBOLS 10 Image projection apparatus 11 Input reception part 12 Image acquisition part 13 1st image registration part 14 Image comparison part 15 Projection image creation part 16 Projection part 17 Image transmission / reception part 18 Network control part 20 Terminal apparatus 30 Server apparatus 40 Image signal transmission cable 50 Network 100 Image Projection System 101 First Interface Unit 102 Operation Input Unit 103 Second Interface Unit 104 Image Forming Unit 105 Storage Unit 106 Image Projecting Unit

JP 2008-77301 A

Claims (7)

A storage unit for storing the first image;
An image acquisition unit for acquiring a second image to be projected;
An image comparison unit that compares the first image stored in the storage unit with the second image acquired by the image acquisition unit;
If at least a part of the second image matches the first image as a result of the comparison by the image comparison unit, the region matching the first image of the second image is not projected. A projection image creating unit for processing the second image to create a projection image;
A projection unit that projects the projection image created by the projection image creation unit,
An image projection apparatus characterized by that. The projection image creation unit includes:
If at least a part of the second image matches the first image as a result of the comparison by the image comparison unit, the second image has a region matching the first image. Creating an image for projection by superimposing images different from one image;
The image projection apparatus according to claim 1. The storage unit stores a plurality of types of the first images,
The image comparison unit compares each of the plurality of types of the first images stored in the storage unit with the second image acquired by the image acquisition unit.
The image projection apparatus according to claim 1, wherein the image projection apparatus is an image projection apparatus. The image comparison unit compares the first image with the second image each time the second image acquired by the image acquisition unit is switched.
The image projection apparatus according to claim 1, wherein the image projection apparatus is an image projection apparatus. The image comparison unit compares the first image with the second image every time a certain period of time elapses.
The image projection apparatus according to claim 1, wherein the image projection apparatus is an image projection apparatus. A first step of obtaining a second image to be projected;
A second step of comparing the first image stored in the storage unit with the second image acquired in the first step;
As a result of the comparison in the second step, if at least a part of the second image coincides with the first image, the region of the second image that coincides with the first image is not projected. A third step of processing the second image to create a projection image;
A fourth step of projecting the projection image created in the third step,
An image projection method characterized by the above.   The program which makes a computer perform the image projection method of Claim 6.

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