Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 10, 2015
|
|
---|---|---|
Article Number | 15038 | |
Number of page(s) | 7 | |
DOI | https://doi.org/10.2971/jeos.2015.15038 | |
Published online | 16 August 2015 |
Regular paper
High-speed, high-accuracy 3D shape measurement based on binary color fringe defocused projection
Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang, 330063, China
Received:
16
May
2015
Revised:
1
July
2015
A widely used method in high-speed 3D shape measurement, color-code fringe projection requires the projection of only one image. In traditional color-code method, the projected fringe is compounded by sinusoidal fringes, grayscale value distribution ranges from 0–255, and projection speed is limited to 120 frames/s. Consequently, measurement speed is restricted, and a nonlinear gamma of the projector exists, as well as high harmonics, which have a great influence on measurement accuracy. Binary color-code fringe defocused projection is proposed to solve the abovementioned problems. With the proposed method, projection speed can switch to tens of K frames/s because it only has two grayscale values (0 and 255). A standard sinusoidal color-code fringe can be generated by properly defocusing the binary color-code fringe, thereby overcoming the influence of nonlinear gamma and ultimately improving measurement accuracy. Experiment results verify the feasibility and superiority of the proposed method.
Key words: Three-dimensional shape measurement / color-code fringe / binary fringe / defocused
© The Author(s) 2015. All rights reserved.
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