Proposal of Fragile Digital Watermaking for Image using Linear Prediction

摘要

Generally, digital images can be altered easily without any evidence. In order to prevent an illegal alter-ation, fragile watermarking methods are studied. By embedding the thumbnail image of an original image, one can reproduce an outline of the original image. In that case, the quality of the embedded image becomes worse, because many information needs to be embedded. We propose a new fragile watermarking method with high quality. In the method, for the reduction of the embedded information, a prediction error that is calculated from the thumbnail image by using AR-model of the image is embedded.