An Efficient Semi-fragile Watermarking Scheme for Tamper Localization and Recovery

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Hou, Xiang^1 ; Yang, Hui^1 ; Min, Lianquan^1

Information Engineering University, Zhengzhou, China^1

关键词: Absolute values;    Gray-level;    Least significant bits;    Original images;    Random Matrix;    Remote sensing images;    Semi-fragile watermarking;    Tamper localization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/5/052055/pdf
DOI  :  10.1088/1757-899X/322/5/052055

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To solve the problem that remote sensing images are vulnerable to be tampered, a semi-fragile watermarking scheme was proposed. Binary random matrix was used as the authentication watermark, which was embedded by quantizing the maximum absolute value of directional sub-bands coefficients. The average gray level of every non-overlapping 4×4 block was adopted as the recovery watermark, which was embedded in the least significant bit. Watermarking detection could be done directly without resorting to the original images. Experimental results showed our method was robust against rational distortions to a certain extent. At the same time, it was fragile to malicious manipulation, and realized accurate localization and approximate recovery of the tampered regions. Therefore, this scheme can protect the security of remote sensing image effectively.