Application of Subpixel Edge Detection in Laser Spot Image Detection and Control

Zhehao Pan; Haoran Zhang; Lei Shi

doi:10.6919/ICJE.202409_10(9).0006

Authors

Zhehao Pan
Haoran Zhang
Lei Shi

DOI:

https://doi.org/10.6919/ICJE.202409_10(9).0006

Keywords:

Edge Extraction; Image Preprocessing; Metal Parts; Quality Control; Subpixel Algorithms.

Abstract

The low accuracy of pixel-level edge detection leads to large errors in the measurement of light spots. For this reason, a high-precision measurement method for light spots based on sub-pixel edge detection is proposed. The method assumes that the grey value of the pixel unit through which the edge of the object passes is discontinuous, and builds a model in the rectangular neighbourhood of each edge pixel unit, which is positioned by the improved grey moment sub-pixel algorithm, which makes the accuracy improve again. The experimental results show that the detection accuracy of the improved grey moment sub-pixel algorithm is high which verifies that the method has high stability and accuracy.

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