The Watermarking Algorithm Based On The Number Of Histogram Equalization And Harris Corner Detection

Now,Digital Watermarking technology is a new aspect of information security domain and it can play an important part.These techn iques can protect the copyright of the digital media.But along with watermarking attack appears,especially the geometric attack,it is to make the watermarking unavailable.The main content is the Digital Watermarking based on image character.When comers are detected,some images look like too dark or too bright.Not only the number of comers is very little,but also the distribution of them is asymmetric.So before detecting corners,the image must be deal with histogram equalization algorithm,and then it is to detect corners using Harris detection algorithm.Therefore,the watermarking embedded in the image can resist the geometric attack,especially shear attack.This paper's key is to make the histogram equalization algorithm and Harris detection algorithm unite in order to improve the quantity and quality of the corners.This dissertation is divided into 5 chapters.The first chapter' main contents include the preview of the watermarking,the developing actuality and the sense of the digital watermark technic resisting the geometric attack;the second chapter gives the digital watermark summarize;in chapter 3,it is the introduction of image algorithm resisting the geometric attack;in the fourth chapter,the main content is histogram equalization algorithm,Harris detection algorithm and the result of corners detected;the fifth chapter is the material experiment process,including the embedding and detecting of Watermarking and the experiment result about resisting the shear attack.Finally a conclusion is made to summarize the major points and prospect of future.