3D measurement of human plantar foot by projection moiré technique Online publication date: Wed, 20-Aug-2014
by Sara Del Vecchio; Priscila Albuquerque De Araújo; Juan Carlos Campos Rubio; Marcos Pinotti; Meinhard Sesselmann
International Journal of Mechatronics and Manufacturing Systems (IJMMS), Vol. 5, No. 1, 2012
Abstract: An optical system composed of an LCD projector, a digital camera and a microcomputer aims to measure three-dimensionally human foot model and is based on projection moiré technique. Four digital phase shifted parallel grating patterns are projected upon the specimen surface and observed by the camera. A phase map of moiré fringes is produce digitally combining the fringe maps distorted by the foot whit those, left undistorted, by a reference plane. The 3D profile was calculated using two-dimensional greyscale images by dedicated software. This profile was compared to the measurement data of the same foot obtained from a coordinate measuring machine (CMM). A brief metrological analysis estimated an uncertainty value of 6.3% for the foot. The main advantages of this system were its easy set-up, use of standard optical components, absence of moving parts and its possible applicability in bioengineering.
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