数据采集与处理2011，Vol.26Issue(3)：326-333,8.
离焦数字粒子图像测速中粒子中心检测方法
Particle Centroid Detection Method for DDPIV
摘要
Abstract
In defocusing digital particle image velocimetry (DDPIV), it is difficult to detect the particle centroid since the commonly-used 2D Gaussian function cannot fit the defocused particle intensity profile accurately. Aiming at the issue, a new particle centroid detection method,based on the circular Hough transform, is proposed. Firstly, the original particle image is divided into several overlapping sub-regions, and the particle edges are detected and thinned.Secondly, the circular Hough transform and the hierarchical particle detection method used to detect the centroids of non-overlapped particle, overlapped particle and overlapping particle,respectively. Finally, the proposed method is tested by simulation experiments and real experiments. Experimental results demonstrate the accuracy and robustness of the proposed method.关键词
离焦数字粒子图像测速/柱子中心检测/粒子灰度分布/圆的霍夫变换Key words
defocusing digital particle image velocimetry/ particle centroid detection/ particle intensity distribution/ circular Hough transform分类
数理科学引用本文复制引用
鲍晓利,李木国,丁莎莎..离焦数字粒子图像测速中粒子中心检测方法[J].数据采集与处理,2011,26(3):326-333,8.基金项目
国家自然科学基金(50879098)资助项目. （50879098）
