Two-dimensional compressed sensing-based compression and encryption method for two color images

Abstract

The invention provides a two-dimensional compressed sensing-based compression and encryption method for two color images. The method comprises two stages: in the first stage, two-dimensional compressed sensing is utilized to perform compressed measurement on two color plaintext images, and then measured values are scrambled and quantized to obtain a compressed ciphertext image; in a second phase,firstly, a color carrier image is normalized, the ciphertext image is embedded into two of the three color components of the normalized color carrier image, the key parameters related to the plaintextare embedded into the other color component of the color carrier image, and the three color components of the color carrier image are recombined to finally obtain the visually safe ciphertext image.According to the invention, data security and appearance security of the two color images can be simultaneously realized.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to a method for compressing and encrypting two color images based on two-dimensional compressed sensing. Background technique [0002] With the rapid development of computer network technology, Internet users can share multimedia data (such as files, audio, images, and videos) through their fingertips, and can see the exchange, sharing, and storage of image information everywhere, and network security issues are becoming increasingly prominent. Image encryption is one of the hot topics in the field of image processing. Because color images contain rich information, have the characteristics of high redundancy, strong correlation between adjacent pixels, and multi-dimensionality, they are widely used in various fields such as remote sensing and medicine. In the existing image encryption algorithms, many of them are encrypted for grayscale images. In order to protect the secu...

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Problems solved by technology

[0005] Aiming at the existing problems in the existing image encryption algorithm, such as the large storage space, the inability to guarantee the visual security of the image, and the large amount of additional information to be transmitted during decryption, the present invention provides a two-color image based on two-dimensional compressed sensing. Compression encryption method can realize data security and appearance security of two color images at the same time

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