Removal of parasitic image due to metal specularity based on digital micromirror device camera

Visual inspection for a highly reflective surface is commonly faced with a serious limitation, which is that useful information on geometric construction and textural defects is covered by a parasitic image due to specular highlights. In order to solve the problem, we propose an effective method for...

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Bibliographic Details
Published in:Optical engineering 2014-06, Vol.53 (6), p.063105-063105
Main Authors: Zhao, Shou-Bo, Zhang, Fu-Min, Qu, Xing-Hua, Chen, Zhe, Zheng, Shi-Wei
Format: Article
Language:English
Subjects:
Cameras
Devices
Digital
Formations
Image reconstruction
Reconstruction
Visual inspection
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Summary:Visual inspection for a highly reflective surface is commonly faced with a serious limitation, which is that useful information on geometric construction and textural defects is covered by a parasitic image due to specular highlights. In order to solve the problem, we propose an effective method for removing the parasitic image. Specifically, a digital micromirror device (DMD) camera for programmable imaging is first described. The strength of the optical system is to process scene ray before image formation. Based on the DMD camera, an iterative algorithm of modulated region selection, precise region mapping, and multimodulation provides removal of the parasitic image and reconstruction of a correction image. Finally, experimental results show the performance of the proposed approach.
ISSN:0091-3286
1560-2303
DOI:10.1117/1.OE.53.6.063105