Measurement of the face's topography by digitally enhanced shadow Moire

Avshalom Ivnitsky

doi:10.1117/12.2294376

1 August 1990 Measurement of the face's topography by digitally enhanced shadow Moire

Avshalom Ivnitsky

Proceedings Volume 1395, Close-Range Photogrammetry Meets Machine Vision; 13953P (1990) https://doi.org/10.1117/12.2294376
Event: Close-Range Photogrammetry Meets Machine Vision, 1990, Zurich, Switzerland

Abstract

In order to adapt the pilot's pressure mask individually there is a need to evaluate the topography of the human face. Classical shadow moire technique was combined with modern digital image processing to insure the capability of the developed system to automatically trace the location of the full and half multiples of moire fringes. Use of digital image processing allows depth measurements not only at those fringe locations, but also at the fractional fringe position, thus one can use less dense fringe patterns. Such patterns are more easily adapted for automated processing. The developed software and hardware are capable to acquire the image, digitize it and calculate the 3D location for any point in the area of interest, with plane resolution of 0.5 mm and depth resolution of 0.3 mm. The developed approach can be modified to work on a variety of surface topologies, which require fast and automated analysis with the digital output transferred to a cutting device.

Citation Download Citation

Avshalom Ivnitsky "Measurement of the face's topography by digitally enhanced shadow Moire", Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 13953P (1 August 1990); https://doi.org/10.1117/12.2294376

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