A New Image Zero-watermarking Algorithm Based on SVD
Wang Wen-xia · Computer Era · 2010
The digital watermark embedding and extracting algorithms based on time domain and transform domain generally modify original image data,resulting in the insoluble conflict of robustness and concealment.Zero-watermarking technique has solved the conflict of robustness and concealment when digital watermark is embedded.Zero-watermarking does not change original images,so the images get better protected.An improved zero-watermarking algorithm based on singular value decomposition is proposed.The experiment shows that the algorithm has good robustness and can effectively identify tampered areas in images.