A Method of Hiding Image Information with Large Capacity and Resisting Large Compression

Abstract

The invention discloses a method for hiding high-capacity compression-resisting image information; a criterion for classifying sub-images is provided, before embedding the information, carrier sub-images are classified according to characteristics thereof, the optimal sub-image is selected out to hide information, and thereby information hiding performance is effectively improved. In order to further increase robustness of information hiding, a method of reinforcing bit is skillfully provided, correctness of extracting secret information can still be ensured under the condition of being compressed at a large compression ratio, the maximal relative hiding capacity can be up to 1 / 8, and the maximal compression-resisting time can be up to 20 times and even higher. The secret information and the carrier images can be recovered in a high-quality mode under the condition of achieving two-time compression to sixteen-time compression of a JPEG2000 algorithm, wherein the typical value of PSNR of the recovered carrier image is 40dB.

Description

technical field [0001] The invention relates to an image communication method, in particular to a large-capacity anti-large compression image information hiding method, which belongs to the field of communication (such as data communication technology, etc.). Background technique [0002] With the development of science and technology, people's demand for high-resolution images is increasing. If data is hidden in it, the efficiency of data storage and transmission can be improved; therefore, without increasing the transmission rate (or without increasing the amount of transmitted data) It is very meaningful to improve the quantity and quality of hidden information in high-speed data. [0003] At present, the problems of information hiding methods in the world are as follows: [0004] The least significant bit (LSB) hiding method is the simplest information hiding method, it directly replaces the least significant bit of the carrier image with the information bits to be hidd...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the relatively weak anti-compression ability of the traditional hiding method in the case of large-capacity hiding, and to provide a large-capacity anti-large compression image information hiding method, which has the ability to resist large compression ratio compression (JPEG2000 ) capacity, up to 8 times, 16 times, 20 times or even higher

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