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摄影测量中一种新的编码点识别和提取算法 被引量:3

A new algorithm of identifying and extracting coded poded point photogrammetry
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摘要 描述一种符合摄影测量要求的编码点,并提出一种新的识别和提取编码点算法。这种编码点有15位编码,编码的数量达到2191,完全能够满足摄影测量的要求。通过Canny算子边缘提取和椭圆拟合,极大地提高了识别的正确率,能够实现解码的高鲁棒性。编码点中心坐标的精度达到亚像素级。该解码方法简单,且编码点识别率极高。 A sort coded point according to design command in photogrammetry is described, and a new algorithm to identify and extract coded point is brought out. There is 15-bit code in this coded point, and the number of code reaches 2191, and can meet the command. By through extracting edge pixels with Canny operator and fitting ellipse, the correctness of identification is greatly enhanced, and the high robust of decode is achieved. The central coordinate precision of coded point reaches subpixel. This decode method is simple, and the identity of coded point is very high.
出处 《自动化与仪器仪表》 2009年第2期75-77,99,共4页 Automation & Instrumentation
关键词 编码点 CANNY边缘检测 椭圆拟合 亚像素 匹配 Coded point Canny edge detection Ellipse fit Subpixel Matching
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