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FPGA-accelerated Phase Rectification for a Stereo-based Phase Measuring Profilometry System

: Junger, C.; Heß, A.; Rosenberger, M.; Notni, G.

Fulltext ()

Institute of Physics -IOP-, London:
XXII World Congress of the International Measurement Confederation, IMEKO 2018 : 3-6 September 2018, Belfast, United Kingdom
Bristol: IOP Publishing, 2018 (Journal of physics. Conference series 1065)
Art. 032017, 5 pp.
International Measurement Confederation (IMEKO World Congress) <22, 2018, Belfast>
Conference Paper, Electronic Publication
Fraunhofer IOF ()

This paper proposes a FPGA-accelerated lens undistortion and rectification algorithm for a stereo-based phase measuring profilometry system. After a brief system overview we go into detail on the proposed hardware architecture for the stereo rectification block. The hardware architecture is based on a Xilinx Zynq-7020 SoC and uses compressed rectification maps to reduce the memory load. As a result, it is able to rectify a stereo setup with 435 mm baseline and converged optical axis of 32° between the cameras. The cameras are configured with 2 Mpix @ 60 fps and rectification can be applied "on the fly" during image grabbing.