A novel weak chirp typed blind watermarking detection algorithm based on wavelet and duffing oscillators
小波域利用Duffing振子检测的图像水印算法

To enhance the robustness of the Chirp typed watermark,propose an algorithm based on Duffing Oscillators.First we change the Chirp signal which was embedded into the low frequency band of the host image in the wavelet domain into single frequency periodic signal,then we detect the periodic signal by the Duffing oscillators.The model of deterministic signal detection with unknown parameters is utilized to formulate the watermark detection.Experiments show that the detector perform effectively when the signal...