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Image sequence encrypting and decrypting method

An image sequence and pixel value sequence block technology, which is applied in the field of image sequence encryption and decryption, can solve problems such as insufficient security, reduced encoding compression rate, and format loss, so as to solve low encoding compression rate, avoid insufficient security, The effect of small space occupation

Active Publication Date: 2012-02-01
于培宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned technical defects, provide an encryption algorithm with a small space occupation, overcome the traditional digital encryption algorithm's disadvantages of complex process, large amount of calculation, high cost, and format loss, and at the same time avoid simple image sequence data The security of the random scrambling algorithm is not enough, and it solves the encryption / decryption method of the image sequence that reduces the encoding compression rate

Method used

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  • Image sequence encrypting and decrypting method
  • Image sequence encrypting and decrypting method
  • Image sequence encrypting and decrypting method

Examples

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Effect test

Embodiment 1

[0064] Such as image 3 As shown, an image sequence encryption and decryption method is to concatenate pixel values ​​with the same pixel bit order in an image sequence with an arbitrary length of frames to form a pixel value sequence block.

[0065] Specifically: in the image sequence, the positions of the first pixel position, the second pixel position, the third pixel position, and the nth pixel position in each frame of the image are positioned and expressed sequentially through coordinates, according to the frame The bit order information of the inner image pixels is the bit order information formed by the known bit order information existing in the image sequence. For the description of the target result example, let the vector Z be the time vector of the demonstration image sequence, and at the same time be the expression of the image sequence The frame sequence vector of , taking six pixel positions for each frame of image as an example, the pixel bit sequence is WX1, ...

Embodiment 2

[0088] As shown in 6, an image sequence encryption / decryption method is to concatenate pixel values ​​with the same pixel bit sequence in consecutive frames of images in the image sequence to form a "pixel value sequence block".

[0089] Specifically: in the image sequence, the positions of the first pixel position, the second pixel position, the third pixel position, and the nth pixel position in each frame of the image are positioned and expressed sequentially through coordinates, according to the frame The bit order information of the inner image pixels is the bit order information formed by the known bit order information existing in the image sequence. For the description of the target result example, let the vector Z be the time vector of the demonstration image sequence, and at the same time be the expression of the image sequence The frame sequence vector of , taking six pixel positions for each frame of image as an example, the pixel bit sequence is WX1, WX2, WX3, WX4,...

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Abstract

The invention relates to a method for encrypting content in an image sequence, which comprises the following steps of: in an image sequence, sorting pixel content forming all frame images by a bit sequence and / or a timing sequence to form pixel bit sequences; integrating and connecting in series all pixel bit sequence numbers which are obtained after encoding the image sequence to form a pixel value sequence block and / or connecting in series the pixel values of the same pixel bit sequences of the images with any frame length in the image sequence to form a pixel value sequence block. The pixel bit sequences of the natural bit sequence of the image sequence in which the pixel value sequence block is are completely mapped to the pixel bit sequences of the encrypted and encoded image sequence, and the encrypted image sequence is formed.

Description

technical field [0001] The invention relates to an encryption technology, in particular to an image sequence encryption and decryption method. Background technique [0002] With the rapid development of Internet technology, today's society has entered a new era of network information. Through the network, digital video information has been widely disseminated. At the same time, network security has attracted increasing attention due to issues involving personal privacy, commercial interests, and even state secrets. Reliable encryption processing of transmitted digital images and videos has become one of the important research directions in the field of information encryption. Traditional cryptography focuses on the encryption of text data, which provides the most direct theoretical basis for the encryption technology of digital images and videos, but its object is binary data streams, ignoring the digital production and visual effects of images and videos. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2347
Inventor 于培宁
Owner 于培宁
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