The Optimization of DCT Fragile Watermark Based on the Differential Evolution Algorithm
Mei Bai · Enterprise Science and Technology & Development · 2010
Discrete cosine transform-based watermarking intercalation technology has the problem of rounding error introduced by the process of float- integer conversion.This article revises this rounding errors by a differential evolution algorithm, improves the performance of the discrete cosine transform-based fragile watermarking.At the same time,the algorithm is introduced and described and its performance is compared.Finally,this article makes a detailed comparison among the the standard correlation similarity of the extracted watermark,the peak signal to noise ratio of the image after adding watermark,and the quality of algorithm results and convergence rate.