基于主观试验的自适应视频水印算法  

Design of Adaptive Watermarking Algorithms for Video Signals Using Subjective Tests

作　　者：宋星光[1] 张春田[1] 苏育挺[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《计算机科学》2009年第8期291-295,共5页Computer Science

基　　金：863国家重点基金项目(2006AA01Z407)资助

摘　　要：借助主观试验,给出了一种主观自适应视频水印算法。通过主观试验确定图像中具有不同活动性的像素点水印嵌入强度可觉察门限,得到掩盖函数,并依此控制水印信息的嵌入强度,从而在确保图像具有高质量的同时,充分挖掘视觉潜力,提高水印信息的嵌入强度。实验结果表明,与空域非自适应水印算法和基于简单视觉模型的自适应水印算法相比,基于主观试验的自适应水印算法在保证图像具有高主观质量的同时获得了更高的水印信息检测正确率。By introducing the subjective tests, a subjective optimized adaptive video watermarking algorithm was presented. This paper described an adaptive watermarking algorithm which is based on measured visibility thresholds of the impairments brought by watermarking. The visibility thresholds were determined by subjective tests. Constructions of the watermarking scheme were carried out such that the embedding strength is maximized without exceeding the measured visibility thresholds. Experimental results show that the presented watermarking scheme achieves comparatively high detection rate than spatial non-adaptive watermarking scheme and the simple human visual system based adaptive watermarking scheme.

关 键 词：数字视频水印 主观试验 人眼视觉特性 活动性函数 活动性因子 掩盖函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]