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3 October 2022 Image self-embedding semi-fragile watermarking algorithm based on block truncation coding
Jian Zhang
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Proceedings Volume 12290, International Conference on Computer Network Security and Software Engineering (CNSSE 2022); 1229014 (2022) https://doi.org/10.1117/12.2640716
Event: International Conference on Computer Network Security and Software Engineering (CNSSE 2022), 2022, Zhuhai, China
Abstract
Digital image self embedding watermarking technology is one of the main technical means to solve the problem of image tamper detection and recovery. The existing self embedding watermarking technology has the problem of low authentication granularity. In this paper, an image self embedding semi fragile watermarking algorithm based on block truncation coding is proposed. Watermark generation and embedding: the image is divided into two levels at the block level, and the granularity is 4×4 and 2×2 image block; block truncation coding is used for each 4×4 image blocks are compressed and encoded to generate 2×2. Restore the watermark of the image block, and hash the restored watermark for the authentication watermark of the image block. Tamper authentication and recovery: a 4×4. Compare the watermark extracted from the image block with the watermark generated by the block to judge the two of the image block×whether the sub block two passes the authentication; restore the image block according to the authentication result.
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Jian Zhang "Image self-embedding semi-fragile watermarking algorithm based on block truncation coding", Proc. SPIE 12290, International Conference on Computer Network Security and Software Engineering (CNSSE 2022), 1229014 (3 October 2022); https://doi.org/10.1117/12.2640716
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KEYWORDS
Digital watermarking
Image restoration
Image compression
Image quality
Digital filtering
Image filtering
Gaussian filters
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