JPEG image reversible data hiding method based on two-dimensional histogram translation

Abstract

The invention discloses a JPEG image reversible data hiding method based on two-dimensional histogram translation, which comprises the following steps of: 1) acquiring quantized DCT (Discrete Cosine Transform) coefficient data of an original JPEG image, and performing partitioning, wherein the blocking means that the quantized DCT coefficients are blocked according to the size of 8 * 8 to obtain N quantized DCT coefficient blocks, and each quantized DCT coefficient block comprises one DC coefficient and 63 AC coefficients; 2) performing AC coefficient sequence extraction on the quantized DCT coefficient block with the size of 8 * 8 to obtain a non-zero AC coefficient sequence to be embedded; 3) performing an inter-block pairing strategy on a to-be-embedded non-zero AC coefficient sequence to generate coefficient pairs; and 4) performing a data hiding process of two-dimensional histogram translation according to the generated coefficient. According to the method, the sharpness of the two-dimensional histogram distribution can be improved, the embedding efficiency is improved, the reduction of the visual quality of the JPEG image loaded with the embedded data and the increase of the file size caused by the data embedding process are effectively relieved, and the extra cost required by network transmission is further saved.

Description

technical field [0001] The invention relates to the technical field of multimedia information security, in particular to a method for reversible data hiding of JPEG images based on two-dimensional histogram translation. Background technique [0002] Reversible data hiding technology (RDH) refers to reversibly embedding secret information into the original carrier file, and reversibility allows the carrier file with embedded data to be restored to its original state without loss, and the embedded information can be extracted correctly . This reversible feature is very important in practical applications, and is mainly used in scenarios where loss of carrier files is not allowed. [0003] With the advancement of digital image technology, JPEG image is widely used because of its low image redundancy and high compression efficiency, and gradually becomes the research object of RDH technology. Among them, the data hiding method of two-dimensional histogram translation, due to i...

AI Technical Summary

Problems solved by technology

However, in the case of the same distribution of single quantized DCT coefficients, different coefficient pair generation methods will make the distribution of the two-dimensional histogram significantly different, resulting in differences in embedding performance

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