Technique for positioning moving binocular vision measurement system and data registration with ball target

Fei-fei Gu; Hong Zhao; Zinxin Zhao; Lu Zhang

doi:10.1117/12.2020431

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24 May 2013 Technique for positioning moving binocular vision measurement system and data registration with ball target

Fei-fei Gu, Hong Zhao, Zinxin Zhao, Lu Zhang

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Proceedings Volume 8791, Videometrics, Range Imaging, and Applications XII; and Automated Visual Inspection; 87911Q (2013) https://doi.org/10.1117/12.2020431
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

A ball-based intermediary target technique is presented to position moving machine vision measurement system and to realize data registration under different positions. Large-sized work-piece measurement based on machine vision faces several problems: limited viewing angle, range and accuracy of measurement inversely proportional. To measure the whole work-piece conveniently and precisely, the idea that using balls as registration target is proposed in this paper. Only a single image of the ball target is required from each camera then the vision system is fully calibrated (intrinsic and extrinsic camera parameters). When the vision system has to be moved to measure the whole work-piece, one snapshot of the ball target in the common view can position the system. Then data registration can be fulfilled. To achieve more accurate position of ball’s center, an error correction model is established.

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Fei-fei Gu, Hong Zhao, Zinxin Zhao, and Lu Zhang "Technique for positioning moving binocular vision measurement system and data registration with ball target", Proc. SPIE 8791, Videometrics, Range Imaging, and Applications XII; and Automated Visual Inspection, 87911Q (24 May 2013); https://doi.org/10.1117/12.2020431

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