Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform

YANG Quan; LIU Jing-hong; MA Xiao-fei

doi:10.3788/YJYXS20112605.0677

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Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform

Imaging Technology & Image Processing | 更新时间：2020-08-12

- Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 5, Pages: 677-682(2011)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院研究生院北京,100049
  3. 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
  4. 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
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112605.0677
  CLC： TH761;TP391
- Received：22 March 2011，
  
  Revised：06 April 2011，
  
  Published Online：20 October 2011，
  
  Published：20 October 2011
- 稿件说明：
移动端阅览
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

YANG Quan, LIU Jing-hong, MA Xiao-fei. Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform[J]. , 2011,26(5): 677-682
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 DOI： 10.3788/YJYXS20112605.0677.

YANG Quan, LIU Jing-hong, MA Xiao-fei. Auto-Focusing Method Based on Image Processing for Airborne Electro-Optical Imaging Platform[J]. , 2011,26(5): 677-682 DOI： 10.3788/YJYXS20112605.0677.

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37 s缩短至3~4 s、4~6 s和3~5 s。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。

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 depth of 2 steps

the three search strategies can shorten the focusing time from the full searchs 37 s to 3~4 s

4~6 s and 3~5 s respectively. The experimental results show that

the method can meet the real-time and accurate requirements of airborne electro-optical imaging device.

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references

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