Secret image share method based on block compressed sensing

Abstract

The invention provides a secret image share method based on block compressed sensing, and belongs to the technical field of secret image share. The secret image share method based on the block compressed sensing is characterized by comprising, first of all, reading in a secret image, dividing the secret image into blocks, selecting appropriate observation rate according to channel bandwidth and requirements of users, carrying out quantization coding on obtained observed values, producing a binary system bit sequence, converting numbers of the binary system bit sequence into decimal numbers in sequence, using the decimal numbers as polynomial coefficients in a (r, m) (r and m are positive integers, and the r is equal to or less than the m ) threshold scheme of Shamir, producing shadow images with the number of the m, and sending to different actors to keep through different information channels. A receiving end only needs to receive entire or part information of the shadow images with the number of the r in the shadow images with the number of the m, carries out corresponding converse operation, and can gradually reconstruct an original secret image. The secret image share method based on the block compressed sensing is capable of flexibly applying to changes of the channel bandwidth and variety of requirements of quality of reconstructed images of users, and is applicable to transmitting secret image information under different conditions of the channel bandwidth and in application environment with requirements for compand on image quality.

Description

technical field [0001] The invention belongs to the technical field of secret image sharing, and in particular relates to a secret image sharing method based on block compression sensing. Background technique [0002] At present, while the openness of the network system brings great convenience to people's life, it also poses a great threat to information security, especially in military, medical and commercial fields that require high information integrity and security. , information security is even more important. Digital images have become the main data transmitted in the network because they can carry a large amount of information, and the security of digital images has become one of the issues that are increasingly concerned in the field of information science in today's society. Due to the characteristics of large amount of data, high redundancy and strong correlation between pixels in digital images, traditional information encryption methods can no longer meet the ...

AI Technical Summary

Problems solved by technology

This scheme can reduce the size of the shadow image to 1 / r of the original image, and there is almost no image loss, but the size of the shadow image generated by this scheme is fixed and cannot adapt to the bandwidth change in different environments; after that, Huang and Hsieh et al. A progressive secret sharing scheme is proposed, which can restore the original secret image according to the partial information of the received shadow image. The more shadow image information obtained, the better the restoration effect, but the size of the shadow image is fixed, and it is still difficult to adapt Varying Bandwidth Requirements

It can be seen that the existing schemes do not take into account the change of channel bandwidth and the diversity of user requirements for reconstructed image quality, which limits the flexible application of secret image sharing technology.

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