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Method for information transmission based on JPEG2000 compressed code stream

A technology of compressing code stream and information transmission, which is applied in the field of communication, can solve the problems of unfixed hidden capacity and large amount of additional information, and achieve the effect of reducing image quality and improving utilization rate

Active Publication Date: 2015-12-09
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0004] The existing technology of combining JPEG2000 and information hiding is mainly to partially decompress the JPEG2000 compressed data before hiding transmission, to hide information in wavelet transform coefficients or to adopt other methods, either the hidden capacity is not fixed, or the required More additional information

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  • Method for information transmission based on JPEG2000 compressed code stream

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Embodiment Construction

[0027] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] In order to verify the performance of the algorithm proposed in this paper, in the simulation experiment, the compressed data stream A formed by compressing the 8-bit grayscale image X with a size of 512×512 and compressing 4 times with JPEG2000 is used for information transmission and recovery. The number of bytes of A is L= 512*128 bytes.

[0029] Information bytes: K bytes, arbitrary data: generated by random numbers in simulation. The hidden capacity is K bytes, the relative capacity of the compressed domain is K / (512*128), and the corresponding relative capacity of the original image domain is K / (512*512)

[0030] For example, the hidden capacity is K=2048 bytes, the relative capacity of the compressed domain is 2048 / (512*128)=1 / 32, corresponding to the relative capacity of the original image domain K / (512*512)=1 / 128.

[...

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Abstract

The invention relates to a method for information transmission based on JPEG2000 compressed code stream. According to the method, information can be embedded into different compressed data (compressed at different ratios) of images without increasing the amount of data, change the JPEG2000 compression format or affect normal decompression. A receiving end can recover information as well as carrier images. Under the condition of not increasing channel resources, the amount of data transmitted is increased, and the transmission efficiency of a data transmission system is improved. By using the method, the ratio of the amount of hidden information in a compressed domain to the total amount of data in the compressed domain can reach a desired ratio, such as 1 / 16, 1 / 8, 1 / 4, and 1 / 2. If data is compressed four times, the ratio of the amount of hidden information to the amount of original data is 1 / 64, 1 / 32, 1 / 16 or 1 / 8. Moreover, information data can be recovered normally. The peak signal-to-noise ratio of a carrier image to an original image is over 30 dB. The PSNR loss ranges from 1 dB to a plurality of dBs. Normal use of images is not affected.

Description

technical field [0001] The invention relates to an image communication method, in particular to a method for embedding information into an image for transmission, and belongs to the field of communication (such as data communication technology, etc.). Background technique [0002] The current society is an information society, and the issue of information security has become an increasingly urgent issue. Information hiding (data hiding) is an important branch of information security. It uses human visual redundancy to embed secret information into the carrier, so as to achieve The purpose of secure transmission of confidential information. Information hiding is usually regarded as a communication process, its input is the secret data to be transmitted, the public carrier data is transmitted in the channel, and the carrier data with hidden secret information is received. [0003] With the development of science and technology, the efficient transmission of image data and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N19/88
Inventor 周诠呼延烺崔涛张茗茗刘娟妮
Owner XIAN INSTITUE OF SPACE RADIO TECH
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