江苏大学学报（自然科学版）2018，Vol.39Issue(1)：78-85,8.DOI:10.3969/j.issn.1671-7775.2018.01.013
基于位平面分解的可逆图像水印算法
Reversible image watermarking algorithm based on bit plane decomposition
摘要
Abstract
To improve visual quality and embedding rate of existing difference expansion reversible image watermarking algorithm , a reversible image watermarking algorithm was proposed based on bit plane decomposition .The carrier image was decomposed by bit plane , and the low 6 bit planes were combined together to form a new image .The new image was divided into non overlapping blocks .The entropy of each block was calculated , and the image blocks with small entropy were selected to embed into watermark by the generalized difference expansion algorithm . The overflow graph and the relevant auxiliary information were embedded into the selected original image blocks of the corresponding image blocks with large entropy by difference quantization method .The 8 bit gray scale images of Lena and Barbara were used to test the reversible watermarking algorithm .The results show that the algorithm has high embedding rate and high visual quality , and the original image can be fully restored .When Lena is used as host image , the payload reaches 0.93 bpp.Compared with other algorithms , the watermark embedding rate is improved with good visual quality .关键词
位平面/可逆图像水印/差值扩展/差值量化/视觉质量Key words
bit plane/reversible image watermarking/difference expansion/difference quantization/vision quality分类
信息技术与安全科学引用本文复制引用
张正伟,吴礼发,高尚兵..基于位平面分解的可逆图像水印算法[J].江苏大学学报（自然科学版）,2018,39(1):78-85,8.基金项目
国家自然科学基金资助项目(61402192) （61402192）
江苏省自然科学基金资助项目(BK20131069) （BK20131069）
