Large-capacity hiding method for reversible data in bitstream encryption domain of JPEG image
A technology of data hiding and bit stream, which is applied in encryption devices with shift registers/memory, image communication, digital transmission systems, etc. It can solve problems such as the influence of steganographic capacity, inconsistent size of encrypted images, and potential safety hazards in encryption algorithms, etc.
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[0091] Example
[0092] A specific implementation of the present invention is a large-capacity reversible data hiding method in the JPEG image bitstream encryption domain, which includes the following steps:
[0093] A, JPEG bitstream encryption
[0094] A1, exchange coefficient scrambling
[0095] A1.1. Bit stream data read:
[0096] The user reads the image X in the JPEG format with a size of H×W, and obtains the original bit stream J of the image X, J={SOI, JH, ECS 1 , ECS 2 ,..., ECS n ,..., ECS N ,EOI}, where:
[0097] SOI is the image start marker, JH is the JPEG header file, and EOI is the image end marker;
[0098] ECS n Is the n-th image block entropy coding in the image, N is the number of image block entropy coding,
[0099] ECS n ={DCC , ACC , ACC ,..., ACC ,...ACC ,EOB}; DCC Is the DC coefficient entropy coding of the nth image block entropy coding, ACC Is ECS n The i-th AC coefficient entropy coding in the, EOB is the end marker of the image block entropy coding, I i...
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