Multi-level Block Differencing Approach for Reversible Data Hiding in Encrypted Images
Open Access
- 24 May 2024
- conference paper
- Published by Association for Computing Machinery (ACM)
- p. 478-483
Abstract
This paper introduces a new RDHEI technique on encrypted images. In our proposed approach, the image is first divided into non-overlapping blocks. The maximum pixel value in each block is found and the difference with other pixels in the block is calculated. Next, the block is then divided into 8 types based on the size of the difference, and compression is applied accordingly. Additionally, the remaining uncompressed pixel in each block is collected for a second layer of compression. Through multiple layers of compression, more compression space is created. Finally, the proposed approach is extended to reversible information hiding in encrypted images. Experimental results demonstrate successful information embedding in encrypted images and increased embedding capacity.Keywords
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