The Research of Image Hash Watermarking Algorithm Based on Compressed Sensing
Zhou Yan, Zhang De-feng, MA Zi-long · Acta Scientiarum Naturalium Universitatis Sunyatseni · 2010
For the reason that the robustness and tamper detection for existing content-based watermarking algorithms are poor,an image hash watermarking algorithm is proposed based on compressive sensing.It conducts random projection on image using compressive sensing,and gets compressive measurements which represent the content features of image.By the HMAC algorithm,the image digest is generated and embedded into the original image as watermark.When authentication,the watermark is extracted from the tampered image,and random projection on the tampered image is conducted.By comparing the image digests between original and tampered images,the image authentication and tamper detection are implemented.Experimental results show that the proposed algorithm not only has strong robustness and security,but also has good ability of tamper detection.