基于像素分解的圆形标志点亚像素定位研究  

Study on Sub-pixel Location of Circle Target Based on Unmixing the Mixed Pixels

作　　者：宿晓玮 孙久运 

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《微电子学与计算机》2014年第3期74-77,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(41171343)

摘　　要：影像中圆形标志点的定位对于数字摄影测量具有重要作用.通过对圆形标志点边缘处的混合像素进行亚像素定位,提取出标志点的亚像素级边缘,再基于最小二乘原理进行椭圆拟合得到圆形标志的中心坐标.运用三种实验表明,与直接采用像素级边缘进行拟合定位相比,该方法的精度明显提高.The location of circle target in the image is very important to digital photogrammetry .Sub-pixel edge positions of the target are got by sub-pixel location in mixed pixels of the target edge .Then ,the center position of the circle target are calculated by the least squares elliptical fitting .Three experiments prove that the precision of this location method is higher than the precision of traditional method that elliptical fitting with pixel edge .

关 键 词：亚像素级边缘 亚像素定位 混合像素 椭圆拟合 

分 类 号：P232[天文地球—摄影测量与遥感]