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| 基于图像处理的机载光电平台自动调焦方法 | |
| 引用本文： | 杨权,刘晶红,马晓飞.基于图像处理的机载光电平台自动调焦方法[J].液晶与显示,2011,26(5):677-682. |
| 作者姓名： | 杨权 刘晶红 马晓飞 |
| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所中国科学院航空光学成像与测量重点实验室,吉林,长春,130033;中国科学院研究生院,北京,100039 2. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033 3. 总装备部沈阳军事代表局驻长春地区军事代表室,吉林,长春,130033 |
| 基金项目： | 国家973基金资助项目 |
| 摘 要： | 研究了图像处理的自动调焦方法在机载光电成像设备中的应用。提出了基于图像斜边、水平和垂直边缘检测的调焦评价算子——Bevel算子和Mix算子。选取边缘检测算子和卷积算子分别作为调焦粗搜索和精搜索阶段的清晰度评价算子,设计了适合自动调焦的隔行隔列调焦区域选择方法。采用了变步长爬山搜索法、局部全局搜索法和综合搜索法3种调焦控制策略,使用调焦行程为131步,焦深为2步的变焦镜头,其调焦时间分别从全局搜索法的37s缩短至3～4s、4～6s和3～5s。实验结果表明,该方法能够满足机载光电成像设备的调焦实时性和精确性要求。 |
| 关 键 词： | 机载光电成像设备 清晰度评价函数 边缘检测 调焦区域 调焦控制策略 |
Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform |
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| YANG Quan,LIU Jing-hong,MA Xiao-fei.Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform[J].Chinese Journal of Liquid Crystals and Displays,2011,26(5):677-682. | |
| Authors: | YANG Quan LIU Jing-hong MA Xiao-fei |
| Affiliation: | YANG Quan1,2,LIU Jing-hong3,MA Xiao-fei4(1.Key Laboratory of Airborne Optical Imaging and Measurement,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100039,3.Changchun Institute of Optics,4.Military Representative Office Stationed in Changchun Area by Shenyang Military Representative Bureau,General Armame... |
| Abstract: | Two new focus measure methods(Bevel and Mix operators) derived from gradient edge detection were proposed.The Bevel and Mix operators and correlation operator were respectively chosen as the focus measure method of coarse search and fine search.A new method of selecting suitable focusing region was presented.Then,mountain climbing search strategy with variable step(MCS),local-global search strategy(LGS) and general search strategy(GES) were proposed.Using a lens with focus length of 130 steps and focus dept... |
| Keywords: | airborne electro-optical imaging device focus measure function image edge detection focus areas search strategy |
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