Frequency difference-based screen secret photography prevention device

An anti-candid, frequency-difference technology, applied in the field of information security, can solve problems such as the inability to fundamentally prevent candid photography, the inability to effectively protect the screen content, and the difficulty of file and data protection work.

Active Publication Date: 2017-02-15
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the camera functions on various mobile smart devices become more and more powerful, the behavior of secretly taking pictures of the screen is becoming more and more hidden and difficult to detect
Therefore, in some occasions where it is required to prohibit taking photos and display and exchange information on a display screen, the protection of documents is very difficult.
In particular, important scientific and technological materials, confidential documents, internal information or copyrights of works cannot be effectively prevented from being secretly photographed, which poses a great threat to their protection work
[0003] Most of the existing anti-sneak shooting measures are to monitor the scene and send out an alarm to remind, but this is a passive measure, which can only give a reminder, but cannot fundamentally prevent the sneak shooting behavior, and the content of the screen is still not effectively protected

Method used

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  • Frequency difference-based screen secret photography prevention device
  • Frequency difference-based screen secret photography prevention device

Examples

Experimental program
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Embodiment Construction

[0024] In this embodiment, the screen anti-surveillance device based on the frequency difference is:

[0025] The device has a controllable display window, and the controllable display window is divided into N different areas. Among the N areas, the update frequency of at least one area is not equal to the update frequency of other areas, and: f 1 2 , where, f is the update frequency of all areas divided by the controllable display window, f 1 is the frequency recognized by the human eye, f 2 is the shutter frequency of the camera, and N is not less than 2. If the areas with equal update frequency are regarded as the same area, the update frequency of each defined area will be different.

[0026] In the specific implementation, the controllable display window is divided into N different areas according to the following rules: the controllable display window is divided into M unit blocks in any way, and M is not less than N; one area contains at least one unit block, each A ...

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PUM

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Abstract

The invention discloses a frequency difference-based screen secret photography prevention device. The device is characterized by comprising a controllable display window; the controllable display window is divided into N different regions; and in the N regions, the updating frequency of at least one region is not equal to that of each of other regions, and f is greater than f1 and less than f2, wherein f is the updating frequencies of all the regions obtained by dividing the controllable display window, f1 is a human eye identification frequency, f2 is a camera shutter frequency, and N is not smaller than 2. According to the device, the contents displayed in a display screen can be clearly seen by human eyes, but a camera cannot shoot the contents to obtain a complete image, so that active secret photography prevention of image data displayed in the display screen is realized.

Description

technical field [0001] The invention relates to an anti-sneak shot device in the field of information security, in particular to a screen anti-sneak shot device based on frequency difference. Background technique [0002] As the camera functions on various mobile smart devices become more and more powerful, the behavior of secretly taking pictures of the screen becomes more and more hidden and difficult to be detected. Therefore, it is very difficult to protect documents and materials in some occasions where it is required to prohibit taking photos and at the same time need to display and exchange information on a display screen. In particular, important scientific and technological materials, confidential documents, internal information or copyrights of works cannot be effectively prevented from being secretly photographed, which poses a great threat to their protection work. [0003] Most of the existing anti-sneak shooting measures are to monitor the scene and send out a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60H04N5/232
CPCG06F21/602H04N23/60
Inventor 金施群邢金玉王行芳王喆侯少阳
Owner HEFEI UNIV OF TECH
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