Research On Zero Watermarking Algorithm For Image Tamper Location Based On Hyper-Chaos

Zero watermarking algorithm for image tamper detection and location based on hyper-chaos is proposed in this paper.The proposed scheme is able to solve the problem that zero watermarking algorithm's poor robustness,low security and forgery and spot areas can not be detected and located.Firstly the algorithm realizes the encryption pretreatment of watermarking information taking advantage of the large key space and sensitivity of initial value of the hyper-chaos system.And then analyzing the influence of each bit plane on the image,least significant bit of the image carrier is initialized to zeros to extract the feature matrix using of block mean binary quantization method.Finally,Arnold scrambled characteristics matrix and hyper-chaotic encrypted binary watermarking are executed for xor operation to construct a zero watermarking.In addition,if the image has been tampered,tampered area can be detected and localized accuracy by calculating the difference image.Experimental results show that this algorithm under the condition of good robustness not only has higher security,but also performs well in tampering detection and location.