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Novel image hiding method based on chaotic differential

A chaotic difference and image hiding technology, applied in the field of information security, can solve the problems of excessive calculation, seriousness, distortion, etc., and achieve the effect of reducing distortion, small calculation, good reliability and uniformity

Inactive Publication Date: 2015-04-08
CHONGQING COLLEGE OF ELECTRONICS ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But they all have certain limitations, such as requiring the same size of the secret image and the carrier image, the iterative calculation takes too long, the distortion of the secret image after restoration is serious, and the amount of calculation is too large, etc.

Method used

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  • Novel image hiding method based on chaotic differential
  • Novel image hiding method based on chaotic differential
  • Novel image hiding method based on chaotic differential

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Embodiment Construction

[0025] The present invention is implemented in the following manner:

[0026] 1. The steps to hide the secret image in the public image are as follows (such as figure 1 shown):

[0027] 1) Select two images, one as a secret image and the other as a public image; generally, the secret image can be of any size smaller than the size of the carrier image.

[0028] 2) Let the secret image be S, read the size of S, x1 represents its number of rows, y1 represents its number of columns; let the public image be C, read the size of C, X1 represents its number of rows, Y1 represents its number of columns.

[0029] 2) Set an initial value and use it as the first key seed1, using the chaotic sequence formula Using seed1 as the initial value, generate a chaotic sequence of x1×y1 size, where u∈(3.571448,4), i∈(0,1); use the generated chaotic sequence to form a matrix of the same size as the secret image x1×y1 scf.

[0030] 3) Use the following formula S(i,j)=round(S(i,j)-S(i,j)*scf(i,...

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Abstract

The invention discloses a novel image hiding method based on chaotic differential. The method mainly includes a hiding process of a transmitting end and a recovery process of a receiving end. At the transmitting end, firstly, a chaotic matrix with the size as same as that of a secret image is generated by the aid of secret keys seed1 and u, differential operation is performed for the chaotic matrix and the secret image to obtain a chaotic differential image, secondly, the position of each pixel in the secret image to be hidden in a public image is determined according to a random sequence obtained by a secret key seed2, and finally, the chaotic differential image is hidden in the public image through a common fusion technique. At the receiving end, the recovery process of the secret image is an inverse process of hiding the secret image at the transmitting end. The method is small in calculated amount and wider in applicable range, and is more reliable and uniform by the aid of chaotic encryption. The secret image before hiding is subjected to differential processing, the recovered secret image is lower in distortion, and the size of the public image does not need to be as same as that of the secret image.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a new image hiding method based on chaotic difference. Background technique [0002] Today, the rapid development of network technology and multimedia information technology provides a lot of convenience for people to share information with each other, but at the same time, it also brings security risks. Confidential state information, company confidential information, and personal privacy information may be hijacked by malicious people, and the consequences will be disastrous. Digital image hiding technology is an important branch in the field of information security technology. It uses the weakness of people's visual organs to hide secret images in the carrier image, so that the hidden images cannot be sensed by the visual organs, so that they cannot be seen. to the purpose of the image being hidden. For a long time, the development of digital image hiding techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 杨玉平
Owner CHONGQING COLLEGE OF ELECTRONICS ENG
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