DCT-based Fragile Watermarking Intelligent Optimization Algorithms
Yan Liu · Journal of Qinzhou University · 2011
In the DCT-based fragile watermarking calculating process,the rounding errors incurred by floating number-integer transformation results in the reduction of image's Peak Signal to Noise Ratio(PNSR) and low similarity degree of watermarking standard.The resort to such intelligent optimization algorithms as genetic algorithm and clonal selection algorithm is able to rectify the rounding errors and improve the performance of the DCT-based fragile watermarking.And combined with the use of intelligent algorithms the further application of this approach in other digital watermarking techniques is capable of rectifying rounding errors in a certain calculating procedure.