中国机械工程 ›› 2007, Vol. 18 ›› Issue (21): 2555-2560.
• 智能制造 • 上一篇 下一篇
王平江1;陈德军1;巫孟良2;陈吉红1
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Wang Pingjiang1;Chen Dejun1;Wu Mengliang2;Chen Jihong1
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摘要：
介绍了三种常用的自动对焦评价函数——方差评价函数、梯度评价函数、频谱评价函数，并对后两种评价函数进行了优化。对比分析了三种评价函数在评价的灵敏度、稳定性和计算速度上的优缺点，在此基础上提出了一种三阶段复合的自动对焦方法，该方法在影像测量仪上表现出良好的对焦特性，可以在保证对焦精度的同时实现快速对焦。
关键词: 自动对焦, 图像清晰度, 评价函数, 灵敏度, 稳定性
Abstract:
Three common evaluation functions for automatic focusing were introduced. They were deviations function, gradient function and frequency-spectra function, the later two were optimized. Their merits and deficits in delicacy, stability and velocity were analyzed. And a multiple automatic focusing algorithm based on three-stages was proposed herein. It performs well in the video measuring system and can focus exactly and rapidly.
Key words: automatic focusing;image definition, evaluation function, delicacy, stability
中图分类号:
TP317.4
王平江, 陈德军, 巫孟良, 陈吉红, . 一种复合的自动对焦方法在影像测量仪中的应用[J]. 中国机械工程, 2007, 18(21): 2555-2560.
Wang Pingjiang, Chen Dejun, Wu Mengliang, Chen Jihong. Implementation of a Multiple Automatic Focusing Algorithm for Video Measuring System[J]. China Mechanical Engineering, 2007, 18(21): 2555-2560.
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http://www.cmemo.org.cn/CN/Y2007/V18/I21/2555
