机器视觉测量明暗场复合照明系统优化设计

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关键词：机器视觉；明暗场复合照明；照度均匀度；光照设计中图分类号：TH701；TB811+.1 文献标识码：Adoi：10.37188/OPE.20253320.3203 CSTR：32169.14.OPE.20253320.3203

Abstract： In order to improve the image quality of machine vision inspection systems，this paper studies theproblem of refining the arrngement of light sources for compositeilumination in bright-dark fields. First，the illuminance distribution model of the bright and dark field composite lighting system was established based on Lambert radiation characteristics and linear superposition principle for the first time and then the optimization objective function including the coeficient of variation and the minimum maximum ratio was constructed.Next，an improved simulated annealing-particle swarm algorithm was used to solve for the optimal layout parameters.An experimental platform was constructed and the illuminance distribution inthe target area was measured.Then，to evaluate the efectiveness of the refined scheme，images of the workpieces in the target area were collected，and the illuminance uniformity was calculated and compared with experimental measurements. The measured optimal illuminance uniformity reached O.9219， showing a relative error of 2.59% compared to the AE-SAPSO optimized result. The maximum relative error between the measured illminance uniformity of the workpiece surface and the experimental results is （204号 3.42% . Finally，the performance of the proposed lighting scheme was analyzed by comparing defect visibility under three ilumination modes from the perspectives of binarization qualityand illuminance uniformity.The results demonstrate that the proposed light source layout method efectively enhances illmination uniformity in the target area.

Key words： machine vision；composite illumination in bright-dark fields； illuminance uniformity； lighting design

1引言

机器视觉技术在工业领域中已有十分广泛的应用，比如零件的缺陷检测[1-2]、零件的几何精度测量[3-4]。（剩余14931字）