J4

• 研究论文 • 上一篇    下一篇

现有影像逼真度定义的缺陷及其改进

尹忠海;简剑锋;周利华;季虹;陈婕   

  1. (西安电子科技大学 计算机网络与信息安全教育部重点实验室, 陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-12-20 发布日期:2004-12-20

Defect of the existing fidelity definition and its improvement

YIN Zhong-hai;JIAN Jian-feng;ZHOU Li-hua;JI Hong;CHEN Jie

  

  1. (Ministry of Education Key Lab. of Computer Network and Information Security, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

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.

关键词: 影像逼真度, 误差, 水印, 图像处理

Abstract: 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.

Key words: image fidelity, error, watermarking, image processing

中图分类号: 

  • TP309