Improving 4-D shape measurement by using projector defocusing | Zendy

Yuanzheng Gong | Zendy; Song Zhang | Zendy

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Improving 4-D shape measurement by using projector defocusing

Author(s) -

Yuanzheng Gong,

Song Zhang

Publication year - 2010

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.860181

Subject(s) - projector , digital light processing , structured light 3d scanner , structured light , computer science , projection (relational algebra) , optics , binary number , computer graphics (images) , limit (mathematics) , computer vision , system of measurement , artificial intelligence , physics , mathematics , algorithm , mathematical analysis , arithmetic , scanner , astronomy

This paper presents a real-time 3-D, or 4-D, shape measurement technique that can reach the speed limit of a digital fringe projection system without significantly increasing the system cost. Instead of generating sinusoidal fringe patterns by a computer directly, they are produced by defocusing binary structured patterns. By this means, with a relatively inexpensive camera, the 3-D shape measurement system can double the previously maximum achievable speed, and reaches the refreshing rate of a digital-light-processing (DLP) projector: 120 Hz.

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