High-speed three-dimensional shape measurement using spatial frequency encoding and DLP projector

Yanshuai Tu; Yong Li; Hongzhen Jin; Jian Wang

doi:10.1117/12.2071186

13 November 2014 High-speed three-dimensional shape measurement using spatial frequency encoding and DLP projector

Yanshuai Tu, Yong Li, Hongzhen Jin, Jian Wang

Proceedings Volume 9276, Optical Metrology and Inspection for Industrial Applications III; 92761K (2014) https://doi.org/10.1117/12.2071186
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

A method for high-speed three-dimensional measurement with low-speed camera is proposed. The spatial frequency encoded fringes are projected with high frame rate and deformed fringes are captured with low frame rate. Several fringes are integrated in one captured image. The directions and/or frequencies of these fringes are different. The spatial frequency spectrum of these fringes is separate in spatial frequency domain. So, the phases of different fringes can be obtained by filtering the image with different filters. Then several 3D shapes of different time are obtained from one captured image. The experiments are carried out to verify proposed method and measurement results are demonstrated. The method improves the speed of 3D shape measurement and reduces the cost of measurement system as well.

Citation Download Citation

Yanshuai Tu, Yong Li, Hongzhen Jin, and Jian Wang "High-speed three-dimensional shape measurement using spatial frequency encoding and DLP projector", Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92761K (13 November 2014); https://doi.org/10.1117/12.2071186

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