上下变换对视频图像质量的影响  

Impact on Video Image Quality During Up-down Conversion Processing

作　　者：杨跃华[1] 孟放[1] 姜秀华[1] 

机构地区：[1]中国传媒大学信息工程学院,北京100024

出　　处：《电视技术》2010年第8期33-35,86,共4页Video Engineering

基　　金：国家广播电影电视总局科技项目(2006-15-0)

摘　　要：高标清视频图像在上下变换过程中会不可避免地引起图像质量的下降,对于这种图像损伤,提出通过计算信息熵和边缘能量这两个参数来实现对这类损伤的客观评价。试验表明这两个参数均适用于测量图像损伤。与信息熵相比,边缘能量更适合于评价图像在上下变换过程中的损伤情况。The impairment of HD/SD video image is inevitably brought by the up-down conversion.For this impairment,two objective indexes such as information entropy and edge energy are introduced in this paper.The experimental results show that both of them are applicable to assess this impairment,and the edge energy index is better than the information entropy index for assessing the impairment during the up-down conversion processing.

关 键 词：高标清 上下变换 图像损伤 信息熵 边缘能量 

分 类 号：TN949.6[电子电信—信号与信息处理]