Measurement errors in polarization-based 3D vision systems

Bojian Liang; Andrew M. Wallace; Emanuele Trucco

doi:10.1117/12.263323

20 January 1997 Measurement errors in polarization-based 3D vision systems

Bojian Liang, Andrew M. Wallace, Emanuele Trucco

Author Affiliations +

Proceedings Volume 2909, Three-Dimensional Imaging and Laser-Based Systems for Metrology and Inspection II; (1997) https://doi.org/10.1117/12.263323
Event: Photonics East '96, 1996, Boston, MA, United States

Abstract

Multiple reflections can degrade significantly depth data acquired by laser rangefinders. However, analysis of the polarization state of the reflected light can provide additional clues to distinguish the first and subsequent reflections. Such estimates depend critically on the ratio between absolute differences of intensity measured by a camera with different settings of some polarizing optical components. Errors introduced by weak signals, the nonlinear response of the sensors, noise and quantization in the video channel can be very significant. When a laser is used as the illumination source, fluctuation of the source intensity can introduce additional errors if comparisons are made between images acquired at different times. We presents a discussion of the type and effects of these errors, guidelines on systems settings and an upper-bound analysis of the error on the estimates of the orientation of the completely polarized component of light, a fundamental quantity used in several polarization vision systems for diverse applications.

Citation Download Citation

Bojian Liang, Andrew M. Wallace, and Emanuele Trucco "Measurement errors in polarization-based 3D vision systems", Proc. SPIE 2909, Three-Dimensional Imaging and Laser-Based Systems for Metrology and Inspection II, (20 January 1997); https://doi.org/10.1117/12.263323

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