Nonlinear compensation for optical vignetting in vision systems

doi:10.16511/j.cnki.qhdxxb.2017.25.025

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Abstract Visual inspection systems are being more and more widely applied in industrial production, but optical vignetting directly affects the imaging quality, which affects the inspection accuracy. A nonlinear compensation method for optical vignetting is given which uses the vignetting principle, to define the relative exposure of the image with coupled sampling and decoupling reconstruction to determine the camera response curve. A vignetting compensation model is then developed to eliminate the vignetting effect of the lens to improve the image quality. Tests show that the method is effective and provides excellent vision inspection quality.

Keywords information processing vision inspection optical vignetting effect nonlinear compensation relative exposure

ZTFLH:

TP391

Issue Date: 15 July 2017

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	DING Ying
	FAN Jingtao
	QUAN Wei
	HAN Cheng

Cite this article:

DING Ying,FAN Jingtao,QUAN Wei, et al. Nonlinear compensation for optical vignetting in vision systems[J]. Journal of Tsinghua University(Science and Technology), 2017, 57(7): 702-706.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2017.25.025 OR http://jst.tsinghuajournals.com/EN/Y2017/V57/I7/702

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