Patent ID: 9155475
Filing Date: 2015-10-13
Classification: A61B,H04N

Abstract:
1. A method for enabling hybrid video capture of a subject's exposed skin being illuminated with unstructured and structured illumination sources, the method comprising: manipulating at least one structured illumination source with light projected through a patterned grid and at least one unstructured illumination source illuminating a subject's exposed skin being captured by a video capture device actively acquiring a video of said subject's exposed skin, said video comprising a first and second set of 2D images, wherein said two sets of images may share a subset of common images, each image frame of said first set of 2D images comprising an array of pixels with pixel values corresponding to detected reflected energy projected by said structured illumination source, each image frame of said second set of 2D images comprising an array of pixels with intensity values defining a map of said subject's vascular pattern containing blood vessels which transport hemoglobin and corresponding to detected reflected energy projected by said unstructured illumination source wherein said unstructured illumination source is an ambient light source and said manipulating includes spectrally multiplexing said illumination sources by making a wavelength range of said structured illumination sources narrower than a wavelength range of said unstructured illumination source such that reflected energy from both illumination sources can be recovered via filtering, said unstructured and structured illumination sources having overlapping spectral bands.