摘要
图像调焦越准确,高频分量的能量越多,系统的调焦评价函数反映了图像高频分量的能量,自动调焦的过程就是运用爬山搜索算法求取调焦评价函数最大值的过程。普通的爬山搜索算法会受到调焦评价函数局部极值的干扰而不能准确调焦,优化的调焦评价函数能有效地排除这种干扰,使系统可靠地调焦。本文详细介绍了在红外系统中优化的爬山搜索算法的原理和实现方法。
The better focused the image is, the more energy of high frequency it contains. The focusing evaluation function of the auto-focusing system is consistent with the energy of high frequency of the image. The procedure of auto-focusing is to getting the maximum of the focusing evaluation function employing the mountain-climb searching algorithm. Ordinary mountain-climb searching algorithrm is apt to disturbed by local extremum,while optimized mountain- climb searching algorithm can get rid of this disturbance effectively. This paper introduces the principle and realization of the optimized mountain-climb searching algorithm.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第11期1213-1215,共3页
Laser & Infrared
关键词
自动调焦
爬山搜索算法
调焦评价函数
auto-focusing
mountain climb-searching
focusing evaluation function
