Abstract

The method of phase shift with the projection of multiple cyclic patterns enables 3D measurement that is highly accurate, dense, and fast. However, this measurement is only possible for the wrapped phase value, which has ambiguities in its multiples of cycles. Two particular problems are that conventional methods require additional patterns to be projected to determine the absolute phase and that unwrapping the phase tends to fail where depth varies abruptly. Two methods are proposed: the first is to determine the absolute phase without additional patterns being projected by observing the projected pattern with multiple cameras and applying the geometric constraints between them, and the second is to prevent failure in unwrapping the phase by referring to continuities in the relative phases of multiple projected patterns. The proposed methods were achieved with a 3D scanner that can measure approximately a 180° field of view within 0.5 s, with an accuracy of 0.14  mm in depth.

© 2007 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Profilometry without phase unwrapping using multi-frequency and four-step phase-shift sinusoidal fringe projection

Eun-Hee Kim, Joonku Hahn, Hwi Kim, and Byoungho Lee
Opt. Express 17(10) 7818-7830 (2009)

Optimized stereo matching in binocular three-dimensional measurement system using structured light

Kun Liu, Changhe Zhou, Shengbin Wei, Shaoqing Wang, Xin Fan, and Jianyong Ma
Appl. Opt. 53(26) 6083-6090 (2014)

Multiview phase shifting: a full-resolution and high-speed 3D measurement framework for arbitrary shape dynamic objects

Zhongwei Li, Kai Zhong, Y. F. Li, Xiaohui Zhou, and Yusheng Shi
Opt. Lett. 38(9) 1389-1391 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (17)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription