像素比例校正及其在生成清晰度测试图中的应用  

Correction of pixel ratio and its application in the generation of definition test pattern

作　　者：李春涛[1] 唐强[1] 王立[1] 李桂苓[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《电视技术》2003年第12期91-93,共3页Video Engineering

基　　金：天津市科技发展计划项目(023100611)

摘　　要：针对按计算机方像素生成的图案显示在非方像素显示系统时出现几何失真,提出了基于像素宽高比(PAR)的比例校正算法,并用于建立屏幕虚拟几何中心、计算参数K和导出水平或垂直最高空间分辨率与参数ρ0的关系,从而优化了电视图像清晰度测试图生成算法。实验表明,据此能精确生成多种标准、不同格式的电视测试信号、图、卡和运动序列。The picture made of square pixels generated by computer would show geometric distortion when displayed in the video system made of non-square pixels. To this, the ratio adjustment algorithm based on the PAR is presented in this paper, and used to optimize the algorithm for generating the TV picture definition test pattern by building the dummy center of geometry, calculating the parameter K and deducing the relationship between the highest definition and the parameter Experiments demonstrate that the algorithm can be used to generate many kinds of test signals, patterns and movement sequences precisely to different standards.

关 键 词：像素比例校正 图像清晰度 测试图 像素宽高比 非方像素显示 

分 类 号：TN941.1[电子电信—信号与信息处理]