测量电视的自动调焦系统实现  

Implementation of Automatic Focusing System for Measuring TV

作　　者：梁耀[1] 曹剑中[1] 刘波[1] 黄茹[2] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710068 [2]西安邮电学院计算机系,陕西西安710061

出　　处：《航空计算技术》2005年第3期110-112,共3页Aeronautical Computing Technique

摘　　要：自动调焦系统是保证测量电视获得被测目标清晰图像的一个关键部分,快速有效地实现自动调焦,有助于提高整个系统的性能。本论文提出了一种基于图像处理技术的自动调焦方法,采用Sobel边缘检测算子来检测图像的边缘点数,并根据该值判断是否聚焦,同时采用自适应搜索步长的登山算法控制调焦镜头组得到清晰图像。实验证明,使用本论文算法可对复杂条件下的目标实现自动调焦,增强了测量电视的适用性。Automatic focusing system is a key part of measuring TV for capturing the clear objective image. It is help to enhance the performance of measuring TV with focusing effectively and quickly. An image type automatic focusing system is proposed. The sum of edge points of an image is used as the criterion function whether the image is focused. The hill-climbing automatic focusing principle with adaptive searching step size is also given. The experiments proved that the system can focus the object in the complex condition and improve the adaptability of measuring TV.

关 键 词：自动调焦 边缘点数 自适应搜索步长 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]