![]() ![]() Most existing lossless data hiding techniques increase the file size after embedding the secret data, which negates the advantages of the lossless data hiding scheme. Thus, the earlier techniques might affect the researchers' choice on embedding positions in the JPEG-compressed domain. However, when considering the quantization stage, things may be different. said, traditional data hiding techniques tended to choose the midfrequency DCT coefficients in the DCT transform domain. For the purpose of making the influence caused by data hiding as small as possible, the selection of embedding positions should be carefully considered. Zhe-Ming Lu, Shi-Ze Guo, in Lossless Information Hiding in Images, 2017 6.1.3 ChallengesĪmong various data hiding techniques, the reversible ones for the JPEG domain are still only a few and there is a huge margin for improvement in both the stego image quality and the capacity. ![]()
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