计算机科学 ›› 2019, Vol. 46 ›› Issue (3): 92-96.doi: 10.11896/j.issn.1002-137X.2019.03.012
叶鹏,王永芳,夏雨蒙,安平
YE Peng, WANG Yong-fang, XIA Yu-meng, AN Ping
摘要: 恰可察觉失真模型(JND)是一种人眼感知模型,它是图像/视频压缩中去除冗余最为有效的方法之一。针对现有JND模型对比掩盖效应(CM)的计算不够完善及深度信息的考虑不够准确的问题,文中提出了一种融合深度基于灰度共生矩阵的JND模型。首先,采用总变分分解模型将图像分解为结构部分和纹理部分,对结构部分采用Canny算子处理,对纹理部分采用灰度共生矩阵处理,两个部分形成更准确的CM模型;结合背景亮度掩盖效应,建立了一种基于灰度共生矩阵的像素域JND模型。然后,在对人眼深度感知进行研究的基础上,引入新的深度加权模型。最后,建立了一种新的融合深度基于灰度共生矩阵的感知模型。实验结果表明,所提出的模型更一致于人的视觉感知。相对于已有的JND模型,所提JND模型能够容忍更多的失真,且拥有更好的感知质量。
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