一种用于帧内篡改检测的压缩感知视频水印实现算法

摘要

In order to overcome the drawback of localization accuracy for intraframe tampering detection based on video wa-termarking ,this paper proposes a novel video watermarking generation and intraframe tampering detection algorithm based on feature representation of MPEG-4 (Moving Picture Experts Group-4 ) video content by compressed sensing (CS ) .First ,U and V ,feature pa-rameters of I-VOP(Intra-Video Object Plane) frame ,are extracted utilizing projection of DCT (Discrete Cosine Transform) mea-surement matrix of the CS ,generate the CS-watermarking of the video content ,and embed the CS-watermarking data into the coeffi-cients of low frequency and high frequency of DCT domain in the Y component of image .Compared to Hash-watermarking generat-ing algorithm ,experiment results show that the CS-watermarking algorithm has better data recovery capability and localization accu-racy for video intraframe tampering detection .%针对视频水印在帧内篡改检测方面定位精度的不足，通过压缩感知对MPEG-4（Moving Picture Experts Group-4）视频内容的特征表示，提出一种新的视频水印生成方法及其帧内篡改检测算法。该算法由压缩感知DCT （Dis-crete Cosine Transform ）测量矩阵对I-VOP（Intra-Video Object Plane）图像提取 U、V特征参数，生成基于内容的压缩感知视频水印数据并嵌入到图像 Y分量的DCT中高频系数中实现帧内篡改检测。实验结果表明，与Hash视频水印算法比较，压缩感知视频水印数据具有更好的恢复能力，且水印算法对视频帧内篡改定位精度更高。