A Geometric Invariant Video Watermarking Method Based on DCT Feature Blocks
一种基于DCT域特征块的抗几何攻击的视频水印

A new geometric invariant video watermarking method is proposed based on DCT feature blocks that can satisfy the real-time embedding requirement.In the algorithm,certain number of DCT feature blocks are selected as the embedding points.The synchronization block is calculated accordingly for frame registration before detection is conducted.On the detection side,the feature blocks are firstly extracted for the localization of the synchronization block.And then neighborhood search is implemented on the synchronization block to accurately estimate the geometric distortion.After the frame registration,feature blocks are extracted again for the final watermark detection.Experimental results show that the watermarking system can resist to geometric attacks well with satisfying good invisibility,real-time and security properties.