Improved Lossless Data Hiding for JPEG Images Based on Optimized VLC Mapping
نویسندگان
چکیده
Most reversible data hiding (RDH) schemes embed into JPEG images through DCT coefficients modification, but they will cause unavoidable visual distortion in the marked images. Lossless (LDH) can not only restore cover a lossless way after extraction of embedded also generate without any distortion. For LDH based on variable length code (VLC) mapping, performance depends mainly mapping mode. In this paper, new scheme for optimized VLC is proposed. First, given mode, mathematical model file size change established. Then, Run/Size frequency image and estimation caused by simulated embedding, an iterative method used to find optimal mode that leads smallest increments. Lastly, using mapping. Experimental results show proposed achieve small increase
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ژورنال
عنوان ژورنال: Security and Communication Networks
سال: 2022
ISSN: ['1939-0122', '1939-0114']
DOI: https://doi.org/10.1155/2022/4858806