JP4874045B2 - Image acquisition method by screen shot, image acquisition device, and image acquisition program - Google Patents

Description

  The present invention relates to an image acquisition method by screen shot, an image acquisition device, and an image acquisition program for storing an original image displayed on a screen (display) of a personal computer or the like in a memory.

  A normal personal computer is provided with a screen shot function (also referred to as a print screen function, hereinafter simply referred to as a screen shot), and is provided on a keyboard, for example, a print screen key displaying “PrtSc”. The image (original image) displayed on the screen is saved as image data in the memory as it is by pressing (ON operation) or by a command command from a program in the personal computer. Yes. Therefore, the user of the personal computer can easily acquire (duplicate) the original image simply by turning on the print screen key, read out the acquired original image from the memory as necessary, and display it again on the screen. By applying it to various applications such as printing and processing, it can be used for secondary use.

  In this way, the original image saved in the memory can be read out and redisplayed on the screen at any time by using the screen shot. For example, if an error occurs during the operation of the computer, the original image of the error screen is displayed. Can be used in a convenient way, such as saving the error as soon as possible, by consulting with an expert on the PC while redisplaying the original image later. Can do. Alternatively, when a new content such as a game is devised, the original image of the content can be stored in a memory, and the content can be faithfully disclosed to related parties later.

  However, the ability to freely acquire an original image regardless of the user's intention by using a screen shot in this way is convenient, but sometimes has a negative effect. For example, the file itself is leaked by a file exchange software that is a software for sharing a file between a large number of unspecified computers via the Internet, and information leakage due to screen shot image acquisition, that is, a form of a screen shot There is a considerable increase in information leakage. Therefore, it is a problem that the original image can be freely acquired regardless of the user's intention.

From such a viewpoint, there is provided an image display method that prevents disordered reproduction of an image by a screen shot (see, for example, Patent Document 1). In this image display method, original image data representing an original image is acquired, and a plurality of decomposed images representing a plurality of decomposed images corresponding to those obtained by degrading the original image represented by the original image data based on the acquired original image data After the image data is generated, a plurality of decomposed images represented by the generated decomposed image data are sequentially replaced and displayed so that a person can visually recognize an image that is substantially the same as the original image. According to such an image display method, the original image data is decomposed into a plurality of decomposed image data representing a decomposed image having inferior quality than the original image, so that the original image can be substantially acquired even if copied. Therefore, the random reproduction of the original image is prevented.
JP 2002-281478 A

  By the way, the conventional image display method as described above is effective in terms of preventing random duplication of the image, but even if it is necessary to achieve a legitimate purpose of faithfully acquiring the original original image. Since the original image cannot be faithfully acquired, there arises a disadvantage that the object cannot be achieved. For example, as described above, when you want to acquire an original image to solve an error during computer operation, if the image is far from the original image, the original image is not faithfully reproduced. , You will not be able to achieve that goal.

  Therefore, the present invention can prevent information leakage in the form of a screen shot, and can easily acquire an original image when necessary, an image acquisition method by screen shot, an image acquisition device, and an image acquisition program The purpose is to provide.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a screen shot in which an original image displayed on the screen is stored in a memory so as to be redisplayable by turning on a print screen key or by a command command from a program. The image acquisition method according to claim 1, wherein a control switch for starting and controlling the screen shot is provided, and only when the print screen key is turned on under the condition that the control switch is turned on, or the command command of the program is Only when the original image is stored in the memory by the screen shot, the original image stored in the memory is read when the original image stored in the memory is read a predetermined number of times. If the original image is not read for a certain period of time, the original image is deleted from the memory. Possible and then, under the conditions that do not turned on the control switch, when there is image acquisition action by some reason, indeterminate treated to be subjected to mosaic processing on the original image stored in said memory said It is characterized by being stored in memory .

According to a second aspect of the present invention, there is provided an image acquisition device by means of a screen shot for storing an original image displayed on a screen in a memory so that it can be displayed again by turning on a print screen key or by a command command from a program. The screen shot is controlled only when the print screen key is turned on under the condition that the control switch is activated and the control switch is turned on, or when the program command is issued. When the original image stored in the memory is read a predetermined number of times, or when the original image stored in the memory is not read for a certain period of time, The original image is erased from the memory and cannot be acquired, and the control switch Under on operation conditions without, when there is image acquisition action by any reason, a storage control unit that discriminates non treated is subjected to mosaic processing on the original image stored in the memory is stored in the memory It is characterized by providing.

According to a third aspect of the present invention, there is provided a screen shot image acquisition program for storing an original image displayed on a screen in a memory so that it can be displayed again by turning on a print screen key or by a command command from the program. Determining whether or not a control switch for starting and controlling the screen shot is turned on, and only when the print screen key is turned on with the control switch turned on, or a command command of the program Only when there is a step of storing the original image in the memory by the screen shot, and when the original image stored in the memory is read a predetermined number of times, or the stored in the memory If the original image is not read for a certain period of time, If there is an image acquisition action for some reason under the condition that the original image is deleted and cannot be acquired and the control switch is not turned on, the mosaic stored in the original image stored in the memory And a step of performing a process so as to be indistinguishable and storing it in the memory .

According to the first to third aspects of the present invention, only when the print screen key is turned on under the condition that the control switch for starting the screen shot is turned on, or only when the program command is issued. Since the original image is stored in the memory by the screen shot, the original image is not stored in the memory unless the control switch is turned on. Therefore, since an original image unintended by the user cannot be acquired, information leakage in the form of a screen shot can be prevented. If the control switch is turned on and the print screen key is turned on, or if a program command is issued, the original image is stored in the memory, so that the original image is read from the memory and displayed again if necessary. Thus, the original image can be easily acquired.

Further, when the original image stored in the memory is read a predetermined number of times , or when the original image stored in the memory is not read for a certain period of time, it is automatically deleted from the memory. Unexpected information leakage can be prevented. That is, the possibility of information leakage of the original image stored in the memory can be further reduced.

Further, the control switches under the ON operation is not conditional, when there is image acquisition action by some reason, since stored in the memory by processing the original image indeterminate, even read the original image from the memory mosaicking Since only an indistinguishable original image that has been subjected to can be displayed again, unnecessary information leakage can be prevented. Further, by storing indeterminable original images subjected to mosaic processing in the memory, it is possible to know that there has been an image acquisition action for some reason, that is, there has been an unexpected image acquisition action.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a flowchart showing an image acquisition method using a screen shot according to this embodiment. Hereinafter, a method of acquiring an original image by a screen shot by turning on a print screen key or by a command command from a program will be described with reference to the flowchart of FIG.

  In this embodiment, a hardware switch for starting and controlling screen shots is provided as a control switch in advance on a keyboard such as a personal computer. The keyboard is provided with a normal print screen (PrtSc) key. The control switch acts to enable the screen shot function only when it is turned on. Therefore, when the print screen key is turned on under the condition that the control switch is turned on, or by a command command from a personal computer program, the original image displayed on the screen by that function is directly stored in the memory as image data. Is configured to be stored as

  First, the print screen key on the keyboard is turned on (step S11). Alternatively, a command command (on software) from the program is generated (step S12). Next, it is determined whether or not the control switch is turned on (step S13). When the control switch is not turned on, the print screen key is not activated, and the screen shot function is disabled. Therefore, it is impossible to acquire the original image (step S19).

  On the other hand, when the control switch is turned on, the screen shot is activated, so that the function of the screen shot is enabled and the original image is stored as it is in the memory as image data (step S14). Therefore, the user can acquire the original image (step S15). The acquired original image can be read out from the memory as necessary, re-displayed on the screen, printed, or applied to various applications such as processing, and can be used for secondary use.

  Next, in order to reduce the possibility of information leakage of the original image stored in the memory, when the original image is read from the memory a predetermined number of times, or the original image stored in the memory When the storage time has passed a predetermined time, the original image is automatically deleted from the memory.

  First, it is determined whether or not the original image stored in the memory has been read a predetermined number of times, for example, once (step S16). This is not preferable in terms of information leakage as described above when the original image stored in the memory can be read without limitation, so that the number of times of reading from the memory is set in advance. Is. When the original image is read a predetermined number of times, the original image is automatically deleted from the memory (step S18).

  Next, it is determined whether or not the storage time of the original image stored in the memory is within a predetermined time (step S17). If there is no restriction on the storage time of the original image in the memory, it is not preferable in terms of information leakage as described above, so that the storage time in the memory is set in advance. . When the storage time of the original image has passed a predetermined time, the original image is automatically deleted from the memory (step S18). Therefore, the user cannot acquire the original image (step S19).

  According to the image acquisition method using the screen shot according to the embodiment as described above, the control switch for starting the screen shot is provided, and the print screen key is turned on under the condition that the control switch is turned on. The original image is saved in the memory by the screen shot only when the command is issued or when the program command is issued. Therefore, the original image is not saved in the memory unless the control switch is turned on. Therefore, since an original image unintended by the user cannot be acquired, information leakage in the form of a screen shot can be prevented. Also, if the control switch is turned on and the print screen key is turned on, or if there is a command command of the program, the original image is saved in the memory. The original image can be easily acquired. Moreover, the acquired original image is faithfully reproduced from the original image before being stored in the memory.

  In addition, when the original image stored in the memory is read a predetermined number of times, or when the original image stored in the memory is not read for a certain period of time, the original image is automatically deleted from the memory. Unexpected information leakage can be prevented.

  Next, the case where there is an image acquisition action for some reason other than the on operation of the print screen key or the command command from the program will be described with reference to the flowchart of FIG.

  First, for some reason, for example, it is assumed that a program for acquiring an image stored in a hard disk of a personal computer is executed and there is an image acquisition action (step S21). At this time, if the control switch for starting up the screen shot is not turned on (“YES” in step S22), the original image displayed on the screen is subjected to mosaic processing, whereby the original image is displayed. Indistinguishable and stored in the memory (step S23). Therefore, even if the original image is read from the memory and redisplayed on the screen, the original image is displayed indistinguishable (step S24). On the other hand, when the control switch is turned on (“NO” in step S22), the screen shot is invalidated and the original image cannot be acquired (step S25).

  In this way, when there is an image acquisition action for some reason under the condition that the control switch is not turned on, the original image is mosaic-processed and made indistinguishable and stored in the memory, so the original image is read from the memory. However, since only original images that cannot be discriminated can be displayed again, unexpected information leakage can be prevented. Further, by storing an indistinguishable original image in the memory, it is possible to know that there has been an image acquisition action for some reason, that is, there has been an unexpected image acquisition action. Note that the original image may be subjected to mosaic processing and stored in the memory even when a print screen key is turned on or a command is issued from a program while the control switch is off. That is, the above step S19 may be replaced with steps S23 and S24.

(Embodiment 2)
FIG. 3 is a block diagram schematically illustrating the configuration of the image acquisition device 1 using a screen shot according to this embodiment. The image acquisition apparatus 1 includes a control switch 2 that controls activation of a screen shot, a print screen key 3, an input / output unit 4, a timer 5, a memory 6, and a storage control unit 7 that controls these. ing.

  As in the first embodiment, when the print screen key 3 is turned on with the control switch 2 turned on, or when a command command is input via the input / output unit 4, the storage control unit 7 stores the original image in the memory 6. When the original image is stored in the memory 6, the timer 5 is started, and when the original image stored in the memory 6 is not read for a predetermined time, or the original image stored in the memory 6 is read a predetermined number of times. The storage controller 7 erases the original image from the memory 6.

  Although the first and second embodiments of the present invention have been described above, the specific configuration is not limited to these embodiments, and there are design changes and the like that do not depart from the gist of the present invention. Are also included in the present invention. For example, as an example of using a hard switch as a control switch for controlling activation of a screen shot, the present invention is not limited to this, and a soft switch may be used. For example, the setting items of the control switch may be turned on / off on the application software.

  Moreover, you may make it perform the image acquisition by the above screen shots by a program. That is, the first step (step S13 in the first embodiment) for determining whether or not the control switch for starting and controlling the screen shot is turned on, and the print screen key is turned on while the control switch is turned on. Only when (step S11 in the first embodiment) or when there is a command command of the program (step S12 in the first embodiment), the second step (implementation of saving the original image in the memory by the screen shot) A screen shot image acquisition program including step S14) in the first embodiment may be installed in a personal computer or the like.

It is a flowchart which shows the image acquisition method by the screen shot concerning Embodiment 1 of this invention. 2 is a flowchart illustrating processing when there is an image acquisition action for some reason in the image acquisition method of FIG. 1. It is a schematic block diagram of an image acquisition device using a screen shot according to Embodiment 2 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image acquisition apparatus 2 Control switch 3 Print screen key 4 Input / output part 5 Timer 6 Memory 7 Storage control part

Claims (3)

An image acquisition method by a screen shot in which an original image displayed on a screen is stored in a memory so that it can be displayed again by an on operation of a print screen key or by a command command from a program,
Provided is a control switch for controlling the activation of the screen shot, and only when the print screen key is turned on under the condition that the control switch is turned on, or only when the program command is issued. To store the original image in the memory ,
When the original image stored in the memory is read a predetermined number of times, or when the original image stored in the memory is not read for a certain period of time, the original image is deleted from the memory and acquired. Impossible ,
When there is an image acquisition action for some reason under the condition that the control switch is not turned on, the original image stored in the memory is subjected to mosaic processing to be indistinguishable and stored in the memory ,
An image acquisition method using a screen shot. An image acquisition device with a screen shot that stores an original image displayed on the screen in a memory so that it can be redisplayed by turning on a print screen key or by a command command from a program,
A control switch for starting and controlling the screenshot;
Under the condition that the control switch is turned on, only when the print screen key is turned on, or only when there is a command command of the program, the original image is stored in the memory by the screen shot , and When the original image stored in the memory is read a predetermined number of times, or when the original image stored in the memory is not read for a certain period of time, the original image is deleted from the memory and cannot be acquired. When there is an image acquisition action for some reason under the condition that the control switch is not turned on, the original image stored in the memory is subjected to mosaic processing so that it cannot be discriminated. A storage control unit to store in,
An image acquisition apparatus using a screen shot. A screen shot image acquisition program that stores an original image displayed on a screen in a memory so that it can be displayed again by turning on a print screen key or by a command command from the program,
Determining whether a control switch for starting and controlling the screenshot is turned on;
Storing the original image in the memory according to the screen shot only when the print screen key is turned on in the state where the control switch is turned on, or only when the program command is issued;
When the original image stored in the memory is read a predetermined number of times, or when the original image stored in the memory is not read for a certain period of time, the original image is deleted from the memory and acquired. Impossible steps,
When there is an image acquisition action for some reason under the condition that the control switch is not turned on, the original image stored in the memory is subjected to mosaic processing to be indistinguishable and stored in the memory Steps,
A screen shot image acquisition program characterized by comprising:

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