Digital Image Content Protection Algorithm Based on JPEG 2000
一种基于JPEG 2000的数字图像内容认证算法

Based on the requirements of JPEG 2000 image authentication,a semi-fragile watermarking algorithm for JPEG 2000 image authentication was proposed.First,the original image was divided into blocks,which were rearranged into 1-D Hilbert sequence in Hilbert scanning order.Combined with JND,watermark adaptive embedding in wavelet domain was achieved.Finally,the secret key was introduced to ensure the security of the system.In the authentication side,the hidden information was extracted out from the received image,and rearranged inversely.If the received image is similar to the extracted information,the received image is credible,else that is to say,there exists a local region that is dissimilarity,i.e.the region is tampered,according to corresponding region of extracted information,the tampered position is repaired.Experimental results show the tampered areas are detected and located precisely.