Energy Distribution of Image in Chirp-Fourier Domain and a Chirp Watermarking Algorithm
Chunhua Zhu · Telecommunication Engineering · 2006
The energy distribution of image in Chirp-Fourier domain is analysed and the method of watermark parameter choosing and detecting based on Chirp-Fourier transform is presented.The experimental results show that the proposed watermarking algorithm can make the watermark perceptual invisibility and be detected quickly,and it is also robust to some common image processing.