Video Content Authentication Based on Invertible Semi-fragile Watermarking
Ling Che · Video Engineering · 2015
An invertible semi-fragile watermarking method based on the difference of image blocks is proposed for lossless video content authentication.After I frame H.264 reconstruction,H.264 prediction residuals will help classify image blocks.According to human vision system,more watermarks will be embedded into texture areas than smooth ones.At the receiver side,K-means is used to cluster the difference to achieve high-accuracy watermark extraction.After spatiotemporal authentication,the original frame will be recovered.Experimental results show that the proposed method has good invisibility.And it is sensitive to intentional malicious attacks while it is robust to legitimate manipulations,such as certain level of lossy compression,channel noise and Gaussian filtering.