中国空间科学技术

中国空间科学技术

• •    

一种基于现代通信理论的图像质量评价技术

时红伟,陈世平   

  1. 中国空间技术研究院,中国空间技术研究院 北京100081 ,北京100081
  • 发布日期:2005-02-25

An Assessment of Image Quality Based on Modern Communication Theory

Shi Hongwei Chen Shiping (Chinese Academy of Space Technology, Beijing 100081)   

  • Online:2005-02-25

被引次数

23

摘要： 应用现代通信理论对成像系统进行了分析, 建立了模拟和数字图像的目标信息密度模型。利用目标信息密度增量评估了亚像元技术的应用; 讨论了系统调制传递函数(MTF)和信号噪声比(SNR)对目标信息密度的影响, 发现目标信息密度随 SNR提高而提高, MTF的影响与目标统计特性有关。

关键词: 图像质量, 信息处理, 信息论

Abstract: The modern communication theory is used in the analysis of imaging systems. The object information density model is built for analogue and digital image respectively. The utility of sub pixel technology is evaluated with the increment of object information density. This model is applied in the design of linear array CCD camera, the effect of the system's modulation transfer function (MTF) and signal to noise ration (SNR) on the quality of images is studied. It is found that the image's object information density would improve with the lift of SNR, and the effect of MTF is related with object's characteristics.