Public image watermarking resilient against translation rotation, and scaling

摘要

(57) Abstract The method of detecting the electronic spacing signal inside the digital image data. As for this method of detection, in order to obtain the logarithm polar form Fourier spectrum, the stage which calculates the logarithm polar form fourier transform of the graphics data and, in order to obtain the signal which is extracted, the stage which declares the presence of the electronic spacing signal which is made the goal inside the graphics data the logarithm polar form Fourier spectrum low on the basis of the stage which projects to the dimensional space and, the stage which is compared with the electronic spacing signal which designates the signal which is extracted as goal, comparison, and, it includes. The electron it spaces and in order to obtain the picture which was inserted, the method of inserting the electronic spacing signal in the digital image data furthermore is offered. In order to obtain the picture where as in order to obtain the logarithm polar form Fourier spectrum, the stage which calculates the logarithm polar form fourier transform of the graphics data and, in order to obtain the signal which is extracted, the logarithm polar form Fourier spectrum low the stage which projects to the dimensional space and, been resemblance in the electronic spacing which the signal which is extracted makes goal, stage and the electron which correct the signal which is extracted it spaced this insertion method and, stage and the electron which do 1 anti- multi mapping of the signal which was corrected to the logarithm polar form fourier transform space in order to obtain the group of the factor which was inserted, it spaced and was insertedThe electron it spaces and the stage which does logarithm polar form Fourier adverse change exchanging in group of the factor which was inserted and, it includes.