What did you do? Trying to obtain the histogram of a image of mode "LA". What did you expect to happen? Get the correct histogram. What actually happened? Got the wrong histogram. It seems that the ...

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However, the used 2D mapping is fixed and heuristically designed without considering the image content, so the embedding performance of pairwise PEE can be further improved.

In this paper, considering better utilizing the special properties of quantized DCT coefficients, a new RDH scheme for JPEG images based on multiple two-dimensional (2D) histograms modification is ...