摘要
针对岩石薄片显微图像采集应用过程中的聚焦评价与聚焦搜索问题,提出了一种基于中频滤波和Laplacian聚焦评价函数相结合的聚焦评价方法,以及动态步长聚焦搜索算法。评价方法采用中频滤波算子与图像卷积,保留图像的基本框架,再利用Laplacian聚焦函数进行聚焦评价;对于聚焦搜索算法,则根据每次搜索比较的结果,进行动态更新聚焦搜索的范围和搜索步长,直到找到最佳聚焦平面。本文提出的聚焦评价方法有效降低了聚焦函数的陡峭区宽度并提升了稳定性;提出的聚焦搜索算法有效的降低了局部极值对搜索结果的影响,并通过实验对比验证了方法的有效性和可靠性。
Aiming at the focus evaluation problem and focus search problem in the process of rock slice microscopic image acquisition and application,a focus evaluation method and dynamic step focus search algorithm based on the combination of intermediate frequency filtering and Laplacian focus evaluation function are proposed.First adopt the intermediate frequency filter operator and image convolution to retain the basic frame of the image,and then use the Laplacian focus function for focus evaluation;for the focus search algorithm,according to the results of each search comparison,the range of the focus search and the search step length are dynamically updated until the best focus plane is found.The focus evaluation method proposed in this paper effectively reduces the width of the steep area of the focus function and improves the stability.The proposed focus search algorithm effectively reduces the impact of local extrema on the search results,and the effectiveness and reliability of the method in this paper is verified through experimental comparisons.
作者
梁鑫
卿粼波
要小涛
何海波
LIANG Xin;QING Linbo;YAO Xiaotao;HE Haibo(College of Electronics and Information Engineering,Sichuan university,Chengdu 610065,China;Chengdu Xitu Technology Co.Ltd,Chengdu 610014,China)
出处
《智能计算机与应用》
2022年第1期35-40,共6页
Intelligent Computer and Applications
