A Novel Color Image-Scrambling Digital Watermarking Algorithm based on Discrete Cosine Transform
Taiyu Wang · Communications technology · 2014
In this paper,the coefficient features of Discrete Cosine Transform( DCT) are described and a color image-scrambling digital watermarking algorithm based on DCT is proposed. The scrambled digital watermarking is embedded into original image by subtle perturbations of DCT's corresponding coefficients.Simulation experiment shows that the proposed watermarking scheme is feasible and simple,the embedded watermarking images have little difference from the original images,and the extracted watermark is precise and accurate. Moreover,the digital watermark is imperceptible and robust against various signals processing such as noise adding,cropping,rotating and sharpening,etc.