Considerable information hide method using JPEG2000 compression image as carrier

Abstract

The invention relates to a high capacity information hiding method using JPEG2000 compressing images as the carrier. The operation steps are: applying wavelet decomposition, wavelet coefficients quantification and bit-plane coding to images, and determining the truncation position of the code flow of all coding blocks and the lowest bit-plane of the embeddable information by rate-distortion optimization; primarily choosing a wavelet coefficient which is more than the threshold value as the embedding point, and making a redundancy estimation and adjusting the embedding point and the embedding strength; embedding the synchronous information and the hidden information into the quantified wavelet coefficient in an order of the bit plane from the lowest to the highest starting from the lowest embeddable bit-plane; making a second bit-plane coding and organizing the code flow after embedding the information. The high capacity information hiding method is based on a second coding strategy to determine the embedding position and improves the information hiding volume by self-adaptively choosing the embedding point and adjusting the embedding strength, The high capacity information hiding method has the advantages of being transparent completely for the standard JPEG2000 decoders and being able to be conveniently integrated in the JPEG2000 coders. Meanwhile, the code flow still can decode normally after being embedded with hiding information.

Description

【Technical field】: [0001] The invention relates to the technical fields of information security and multimedia information processing for covert communication using digital images as carriers. 【Background technique】: [0002] Modern information hiding technology is an important direction in the field of information security in the digital information age. Information hiding technology uses the redundancy of digital media itself, as well as the physiological and psychological characteristics of human sensory organs, to hide hidden information in the carrier data. The carrier signal can Be it text, still images, video, audio, etc. There is a significant difference between information hiding and encryption technology. Encryption can hide the content of information, while information hiding can hide the existence of information. The combination of information hiding and encryption technology can greatly improve the level of information security. [0003] When using information ...

AI Technical Summary

Problems solved by technology

This method is more suitable for application in digital watermarking technology, providing functions such as digital copyright protection, but generally not suitable for covert communication, because the spread spectrum preprocessing greatly reduces the information hiding capacity, and the detection of spread spectrum digital watermarking technology There are generally only two results: "yes" or "no", that is to say, it only provides one bit of information hiding capacity

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