Secret image sharing method based on pixel mapping matrix embedding

Abstract

The invention discloses a secret image sharing method based on the pixel mapping matrix embedding and solves the problems of low capability of the existing embedding method and pixel border crossing. The method is characterized by including before sharing, adopting differential coding, Huffman coding and data conversion to compress secret images, and acquiring shared secret data to improve the secret image carrier embedding capability; designing fresh pixel mapping matrix to guarantee all pixels of carrier images and hid secret image information, and improving the embedding capability; in the embedding process, embedding the shared secret data into the the carrier images through the pixel mapping matrix, acquiring host images, and preventing pixel border crossing; finally, recovering secret images and carrier images through the host images. The method has the advantages that in the secret image sharing process, the image transmitting speed is increased, the real-time transmission is guaranteed on the condition of bandwidth limitation, and the method can be applied to the field of network safety.

Description

Technical field [0001] The invention is the field of information security technology. It involves a secret image sharing method with information hidden, which can be used for image protection, image sharing, and real -time transmission of images. Background technique [0002] In 1979, Blakley and Shamir proposed the concept of secret sharing, respectively.The secret sharing method is to divide the secrets into different shares. Among them, the shares of any greater than or equal to a specific quantity can be restored to the secret, otherwise it cannot.Due to the extensive use of images in life, in 1995, Naor and Shamir introduced secret sharing methods into the field of image processing, and proposed the first secret image sharing method.The secret image sharing method divides the secret image into different shares. Among them, any shares of any more than or equal to a specific quantity can restore the secret image, otherwise it cannot.The secret image sharing method provides a e...

AI Technical Summary

Problems solved by technology

However, there are some defects in this method: first, there is a pixel out-of-bounds problem in this method

This method embeds the secret image data into the carrier image by using a quantization method, causing some pixels of the camouflage image to exceed the boundary of the pixel, so that the secret image cannot be recovered without distortion.

Second, although this method improves the embedding ability, the embedding ability is still smaller than the size of the cover image, so when sharing the secret image, the size of the cover image needs to be large, thus forming a large camouflage image, so each participant holds Some share sizes are large. When storing camouflage images, a large space is required. When transmitting camouflage images, it affects real-time transmission and requires high network bandwidth.

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