Image encryption parasitic protection method based on lifting wavelet transform

Abstract

The invention discloses an image encryption parasitic protection method based on lifting wavelet transform, which relates to the image processing field. The method comprises the following steps: the image I 'is decomposed into eight bit planes I'; two adjacent bit planes I 'of the eight bit planes I' are XOR-operated in turn to obtain four bit planes I; Dual-tree discrete wavelet transform is performed on the reference image R to obtain two groups of identical four sub-bands, and the integer part of each group of sub-bands is decomposed into bit planes to obtain the lowest four bit planes of the two HH sub-bands, and then eight bit planes R are obtained; According to 4 bit planes I and 8 bit planes I ', the bit planes R of the selected subbands in each group are replaced and reconstructedto obtain the encrypted image IR. The image encryption parasitic protection method provided by the invention can make the encrypted image look like a reference image visually, can protect the image tothe maximum extent, can not attract the attention of an attacker, and can prevent the image from being attacked.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image encryption parasitic protection method based on lifting wavelet transform. Background technique [0002] At present, in the existing various image encryption technologies, the encrypted image processed by the traditional standard encryption method looks similar to a noise signal, which is easy to attract the attention of the attacker, and it is easy for the attacker to find a loophole to perform encryption on the encrypted image. Decryption has certain security risks. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an image encryption parasitic protection method based on lifting wavelet transform and a storage medium for the deficiencies of the prior art. [0004] The technical scheme that the present invention solves the problems of the technologies described above is as follows: [0005] An image encryptio...

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Problems solved by technology

[0002] At present, in the various existing image encryption technologies, the encrypted image processed by the traditional standard encryption method looks similar to a noise signal, which is easy to attract the attention of the attacker, and it is easy for the attacker to find a loophole to perform encryption on the encrypted image. Decryption, there is a certain security risk

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