摘要
对现有影像逼真定度定义的取值范围及存在的缺陷进行了讨论,发现在某些情况下完全有可能将两幅存在明显视觉差异的图像判为近似或一致.针对这种缺陷给出了新的影像逼真度的定义及计算公式并讨论了两种定义之间的差异与关系,建立了由一种定义导出另一种定义的解析表达式.最后对改进定义的有效性及原有定义的缺陷给出了实验验证.
The Defect of the existing fidelity definition is discussed. By using this definition, it is found that two obviously different images can be determined to be approximate or the same. With the defect in mind, an improved fidelity definition is presented. The difference and relation between the two definitions are discussed and the analytic expression for deriving one definition from the other is also presented.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2004年第6期833-836,869,共5页
Journal of Xidian University
关键词
影像逼真度
误差
水印
图像处理
Error detection
Image analysis
Image processing
Mathematical techniques
Security of data
