Bright Field Droplet Image Recognition Based on Fast Hough Circle Detection Algorithm

Zhenzhen Li,Limin Liao

Published 2022 in International Conference on Computer Research and Development

ABSTRACT

Digital polymerase chain reaction (PCR) bright-field droplet image recognition not only requires manual marking of the diameter and length, which is time-consuming and laborious, but also the existing circle detection algorithm has the problems of slow recognition speed and poor diameter measurement accuracy. In response to these problems, this paper proposes a fast Hough circle droplet detection algorithm. The algorithm mainly includes three steps: firstly, use the gradient information of the edge points and the geometric properties of the circle to determine the candidate circle; secondly, if the distance from the edge point in the set range to the center of the candidate circle is approximately equal to the radius, then the circle is determined as a true circle; finally, the circle with the largest radius among the neighboring true circles is taken as the final detection result. It is verified by comparative experiments that the algorithm can significantly improve the efficiency of droplet recognition and the accuracy of diameter measurement.

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