Patent ID: 9131223
Filing Date: 2015-09-08
Classification: G01B,G06T,H04N

Abstract:
1. A system comprising: an illumination system operable to project a first illumination pattern having a first spatial periodicity and a second illumination pattern having a second spatial periodicity onto an object, and each of the first illumination pattern and the second illumination pattern comprise a superposition of sinusoids; an imaging system having a position spatially disposed from a projector, the imaging system operable to capture a plurality of images; the plurality of images including a first image of an object acquired under the first illumination pattern in a first orientation, wherein the image of the illuminated object is comprised of low frequency Moiré fringes encoding spatial frequencies inaccessible to imaging optics of the imaging system; the plurality of images including a second image of the object acquired under the second illumination pattern in a second orientation, wherein the observed pattern exhibits phase deformations that encode object topography; the first spatial periodicities oriented based on the position of the illumination system relative to the imaging system; the second spatial periodicities oriented based on the position of the illumination system relative to the imaging system and based on an orientation of the first spatial periodicities; and a processor, the processor operable to: