Perceptual watermarking of still images . The First IEEE Signal Processing Society Workshop on Multimedia Signal Processing, Princeton, New Jersey, June 1997. The First IEEE Signal Processing Society Workshop on Multimedia Signal Processing, Princeton, New Jersey, June 1997. However, for these techniques to be applied the possibility to access to the original image must be granted. This complicates the setup of the watermarking system and compels the owner of the original image to share it unsecurely with anyone willing to check for the watermark.
Watermark extraction is performed without resorting to the original, uncorrupted image.
On the other hand, the algorithm is robust enough to represent a good starting point to the protection of image data in network environments. The First IEEE Signal Processing Society Workshop on Multimedia Signal Processing, June 1997, Princeton, New Jersey. For video watermarking, the watermark data rate that can be achieved with a constant, low amplitude is high enough for many applications. In this cases, it is not necessary or appropriate to use a psychovisual model, since such models are often prohibitively complex. Perceptual watermarking of still images .