摘要
该文提出了一种基于脆弱水印对彩色视频认证的方案,把RGB色彩模式转换为YST色彩模式,利用YST模式嵌入水印到彩色视频。首先将T分量按4×4分块并做DCT变换,然后根据I帧图像内DCT低频量化系数关系生成认证码,按照生成的认证码修改每个DCT块的最后一个非0系数作为水印嵌入到图像当中。在视频认证阶段,不需要原视频作为参考,实现盲检测。仿真实验结果表明,该方案保证了原视频的质量,并成功检测了对原始视频的篡改和攻击。
The paper presents a scheme for the color video integrity authentication based on fragile watermarking.The RGB color mode is transformed to YST color mode which is used for embedding watermarking into original video.Firstly,the T-component is selected to make DCT by 4×4 blocks.After that,according to the relationship of the quantized DCT coefficients of the frames,the authentication code is created,which as watermarking is embedded into the image by modifying the last non-zero DCT coefficient.The video authentication is realized without refering to the original video,blind detection can be achieved.The simulation results show that the scheme could keep video＇s quality and also can detect the tamper and attack on original video.
出处
《杭州电子科技大学学报（自然科学版）》
2011年第5期135-138,共4页
Journal of Hangzhou Dianzi University：Natural Sciences
关键词
脆弱水印
篡改定位
盲检测
fragile watermarking
tamper positioning
blind detection
