| 一种基于局域亮度极大的环栅激光图像边缘检测 |
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| 引用本文： | 常治学,王培昌,张秀峰. 一种基于局域亮度极大的环栅激光图像边缘检测[J]. 光电子．激光, 2008, 19(4): 546-548 |
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| 作者姓名： | 常治学 王培昌 张秀峰 |
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| 作者单位： | 大连民族学院,机电与控制工程研究所,辽宁,大连,116600;大连民族学院,机电与控制工程研究所,辽宁,大连,116600;大连民族学院,机电与控制工程研究所,辽宁,大连,116600 |
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| 基金项目： | 辽宁省教育厅资助项目 , 大连民族学院青年基金 |
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| 摘 要： | 针对无衍射激光图像特点,提出了一种由亮环确定图像中心的方法.利用局域亮度最大原理,提取亮环屋脊边缘点;对各个亮环边缘点用最小二乘法拟合圆心,取拟合残差最小的亮环的圆心作为整幅图像中心.该方法运算速度快,对图像无需二值处理,避免了阈值选取不当对图像边缘位置的影响,可以自适应地利用周围像素亮度值来确定图像边缘.该方法已应用到船舶的同轴度检测,获得了很好的结果.
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| 关 键 词： | 边缘检测 图像处理 最小二乘法 拟合残差 |
| 文章编号： | 1005-0086(2008)04-0546-03 |
| 修稿时间： | 2007-03-03 |
A method of edge detection based on maximum of intensity in a local region for ring laser images |
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| CHANG Zhi-xue,WANG Pei-chang,ZHANG Xiu-feng. A method of edge detection based on maximum of intensity in a local region for ring laser images[J]. Journal of Optoelectronics·laser, 2008, 19(4): 546-548 |
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| Authors: | CHANG Zhi-xue WANG Pei-chang ZHANG Xiu-feng |
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| Affiliation: | CHANG Zhi-xue,WANG Pei-chang,ZHANG Xiu-feng(Institute of Electromechanical , Control Engineering,Dalian Nationalities University,Dalian,Liaoning 116600,China) |
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| Abstract: | Based on the features of the non-diffracting laser image,a method to center an image by bright ring is proposed.The edge points of a bright ring are detected based on the maximum of intensity in a local region,and they are fitted into a circle by the least square method.The laser image center is the circle centre with minimum fitting errors.This method is faster in calculation and avoids errors from the incorrect selection of threshold and is self-adopting to the situation of local image for image edge dete... |
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| Keywords: | edge detection image processing least square method fitting error |
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