Predictive segmentation method for 3D inspection accuracy and robustness improvement

J. Reiner; M. Stankiewicz; M. Wójcik

doi:10.1117/12.827482

17 June 2009 Predictive segmentation method for 3D inspection accuracy and robustness improvement

J. Reiner, M. Stankiewicz, M. Wójcik

Proceedings Volume 7389, Optical Measurement Systems for Industrial Inspection VI; 73890A (2009) https://doi.org/10.1117/12.827482
Event: SPIE Europe Optical Metrology, 2009, Munich, Germany

Abstract

Accuracy and robustness of 3D inspection methods, which are based on structural lightening, strongly depend on surface reflectance and its geometry. If the intensity of light profile undergoes disturbances or the image is interfered with reflection artefacts, then the algorithms for height determination fail. The paper presents a method for predictive light profile line segmentation which employs information from 3D model of inspected object. Besides calculation of profile position, based on confidence intervals, the advantage of surface normal pitch and surface scattering are utilized. The necessary information is calculated based on STL object model and surface description extension. The developed algorithm includes error model of camera and laser optics, what corrects distortion and vignetting. The developed solution increases accuracy and robustness of machine vision quality inspection systems especially based on laser triangulation.

Citation Download Citation

J. Reiner, M. Stankiewicz, and M. Wójcik "Predictive segmentation method for 3D inspection accuracy and robustness improvement", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73890A (17 June 2009); https://doi.org/10.1117/12.827482

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