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Method for hiding information in bearing image, image quality evaluation method and information transmission method

A technology for hiding information and images, which is applied in the field of hiding information, and can solve the problems of comparison, the peak signal-to-noise ratio of the restored image and the original image at the receiving end, and the inability to realize the characteristic parameters of the two images, so as to achieve good anti-compression performance, The effect of saving extra cost

Active Publication Date: 2013-02-20
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

However, this evaluation method can only perform subjective and objective evaluation on the received image itself, and cannot directly compare and evaluate the characteristics of the original image and the received image.
[0008] Application number: CN201210178979.2, this invention discloses an image transmission quality evaluation method, which mainly solves the problem that the traditional evaluation method cannot realize the comparison of the characteristic parameters of two images, and greatly improves the image transmission quality of the image data transmission system The objectivity of the evaluation avoids the problems that may be caused by subjective evaluation alone
However, this method hides the characteristic parameters in the original image for uncompressed transmission, or hides the characteristic parameters in the compressed data of the original image for transmission, but the receiving end cannot obtain the peak signal-to-noise between the restored image and the original image Compare

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  • Method for hiding information in bearing image, image quality evaluation method and information transmission method
  • Method for hiding information in bearing image, image quality evaluation method and information transmission method
  • Method for hiding information in bearing image, image quality evaluation method and information transmission method

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Embodiment 1

[0086] The above-mentioned information bits can be a combination of one or several parameters of the peak signal-to-noise ratio PSNR, mean value, variance, and entropy of the bearer image, and these parameters about the bearer image can be hidden in the bearer image by the above method, and sent At the image receiving end, by recovering the parameters at the image receiving end, the evaluation of the quality of the bearer image can be realized. Therefore, in the embodiment of the present invention, an image quality evaluation method using the above method is further provided. In this method, the above information bits are the index parameters of the bearing image, and the image quality can be evaluated by using the index parameters before and after transmission. evaluate.

[0087]Index parameters include one or two of peak signal-to-noise ratio and characteristic parameters.

[0088] Suppose the original image at the image sending end is X (size M*N*8), the gray value is X(i,...

Embodiment 2

[0099] The process of hiding the information bits into the bearer image by using the present invention can be further regarded as the encoding process of the bearer image at the image sending end, and the encoding of each information bit is realized by adjusting the gray value of the bearer image, and At the receiving end, the corresponding decoding method is used to realize the extraction of information bits, which can realize the confidential transmission of information bits by using the bearer image.

[0100] Therefore, in this embodiment, an information hiding step is used at the image sending end to hide the information bits to be encrypted in the bearer image, and an information extraction step is used at the image receiving end to extract the information bits, so that the information described in this embodiment can be realized. Secure transmission of bits.

[0101] It is used to change the pixel value of each image block in the carrying image when the information hidin...

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Abstract

The invention discloses a method for hiding information in a bearing image. The method comprises an information hiding step at an image sending end and an information extraction step at an visual receiving end, wherein the information hiding step comprises a bearing image preprocessing step, and a step of hiding information bits by using the preprocessed bearing image; and the information extraction step adopts a process inverse to the information hiding step to implement extraction of the information bits. Meanwhile, the invention also provides an image quality evaluation method and an information transmission method implemented by adopting the information hiding method. By adopting the methods, the compression resistance of hidden information in the bearing image is improved, the information amount of information which can be hidden is further increased, and objective assessment of picture quality and secrecy transmission of information are realized.

Description

technical field [0001] The invention relates to a method for hiding information in a bearer image, and also relates to an image quality evaluation method using the hiding method and an information transmission method using the image using the hiding method. Background technique [0002] With the development of science and technology, image resolution is getting higher and higher, and the amount of transmitted data is increasing. Generally, data compression technology is used for transmission. The status of spacecraft image compression and data transmission systems is more prominent. The image data transmission The performance evaluation of the system is more and more important. [0003] At present, most image compression algorithms use lossy compression methods to remove visual redundant information, and sacrifice part of the information of the source after compression. The image quality compressed by image compression algorithm and compression equipment directly reflects t...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N17/00H04N19/467
Inventor 周诠李晓博黎军张怡呼延烺李静玲
Owner XIAN INSTITUE OF SPACE RADIO TECH
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