数字图像一阶矩的自动聚焦区域选择算法  

Automatic focusing region selection algorithm based on first order of digital image

作　　者：张乐[1] 姜威[1] 高赞[1] 

机构地区：[1]山东大学信息科学与工程学院,济南250100

出　　处：《光学技术》2008年第2期163-165,169,共4页Optical Technique

基　　金：山东省自然科学基金资助项目(Y200508)

摘　　要：聚焦区域选择是自动聚焦算法中的重要模块,直接影响评价函数曲线的尖锐性、准确性和稳定性。针对中心取窗和多点取窗等传统聚焦区域选择算法的局限性,提出了一种基于数字图像一阶矩的自动聚焦区域选择算法,它是通过图像灰度或边缘一阶矩定位聚焦区域的。传统聚焦区域选择是一种定点估计,实验证明一阶矩方式选择可以跟踪偏离中心的主体景物,是一种具有自适应性的前景位置估计算法,提高了聚焦精确度和速度。Focus region selection is an important part in auto-focusing,which directly influences the sharpness,accuracy and stabilization of the focusing evaluation curve.The first order region selection algorithm is put forward in contrast with the disadvantages of some traditional window selection methods,such as center window selection and multi-region selection.Experiments have proved that the proposed strategy is an adaptive foreground estimation algorithm and can track the main object in image,whether or not it deflects from image center.It can also enhance the focusing accuracy and increase computing speed.

关 键 词：自动聚焦 区域选择算法 一阶矩区域选择 自适应性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]