Comparisons and Analysis of DCT-based Image Watermarking Algorithms

Abstract

This paper provides analysis and comparisons between three main Discrete Cosine Transform-based watermarking algorithms. The comparisons are made based on the degree of degradation the algorithms introduce after embedding the watermark, as well as the Percentage Error Bits (PEB) of the reconstructed watermark with respect to the original watermark. The algorithms’ computational requirements (measured in the total elapsed time on a unified platform) are also considered. Although the three techniques use the same concept, the results show that they behave differently. This variation in the behavior makes each of them suitable for different spectrum of applications.