Stereo embedding by reversible watermarking: Further results

This paper continues our researches on storage and bandwidth reduction for stereo images by using reversible watermarking. By embedding into one frame of the stereo pair the information needed to recover the other frame, the transmission/storage requirements are halved. Furthermore, the content of the image remains available and one out of the two images is exactly recovered. The quality of the other frame depends on two features: the embedding bit-rate of the watermarking and the size of the information needed to be embedded. This paper focuses on the second feature. Instead of a simple residual between the two frames, a disparity compensation scheme is used. The advantage is twofold. First, the quality of the recovered frame is improved. Second, at detection, the disparity frame is immediately available for 3D computation. Experimental results on standard test images are provided.