Real-time phase-stamp range finder with improved accuracy

Akira Kimachi

doi:10.1117/12.825773

4 September 2009 Real-time phase-stamp range finder with improved accuracy

Akira Kimachi

Proceedings Volume 7447, Videometrics, Range Imaging, and Applications X; 744705 (2009) https://doi.org/10.1117/12.825773
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

This paper proposes a method for compensating errors in the phase-stamp range finder (PSRF) proposed by the author. The PSRF consists of the time-domain correlation image sensor (CIS), a sheet of light (SOL), and three-phase sinusoidal reference signals supplied to the CIS. The PSRF produces a range image at the frame rate of the CIS by recording the "phase stamp" of the reference signals at the time of incidence of the SOL over the object during the frame period at each pixel. A problem with the previous PSRF system is that the reconstructed range image suffers artifacts that appear as an undulation and a random noise pattern superimposed on the original surface shape of the object. Experimental results confirm the effectiveness of the proposed method for suppressing the errors in the CIS output images as well as the artifacts in the range images of the PSRF.

Citation Download Citation

Akira Kimachi "Real-time phase-stamp range finder with improved accuracy", Proc. SPIE 7447, Videometrics, Range Imaging, and Applications X, 744705 (4 September 2009); https://doi.org/10.1117/12.825773

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KEYWORDS

Error analysis

3D image reconstruction

Image sensors

Cameras

Phase measurement

3D image processing

Imaging systems

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