基于边缘检测算法的对焦评价函数改进研究

Based on Edge Detection Algorithm of Focusing Evaluation Function Improved Research

本文针对现有边缘检测算法构建对焦评价函数的不足,提出了一种改进的基于Sobel算子的边缘检测算法,该算法能在一定程度上有效地解决由计算中的方位局限产生的边缘粗糙,在极点附近尖锐性表现不明显等问题,能更好地满足对焦评价函数的性能特征。本文最后通过仿真实验证明了该改进算法可行,在峰值两侧具有很好的单调性,比其它同类算子变现出更高的灵敏度,可以较好地满足对焦评价标准。

Aiming at the existing edge detection algorithm of constructing focusing evaluation function insufficient,this paper proposes an improved research on Sobel edge detection algorithm,in certain degree algorithm can effectively solve the problem in the calculation of the azimuth limitations,and solves in the vertex maximum performance is not significant issues.Finally,through the simulation results showed that this algorithm was feasible,the maximum sides had very good monotonicity and contrast to other similar operator cashed out higher sensitivity,this algorithm can also well satisfy focusing evaluation standard.