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United States Patent
Methods, systems, and computer program products for imperceptibly embedding structured light patterns in projected color images for display on planar and non-planar surfaces

Patent Number: 7,182,465
Date of Patent: 27 February 2007
Inventors: Fuchs; Henry (Chapel Hill, NC), Cotting; Daniel (Zurich, CH), Naef; Martin (Glasgow, GB), Gross; Markus (Zurich, CH)
Assignee: The University of North Carolina (Chapel Hill, NC)
Appl. No.: 11/066,629
Filed: 25 February 2005
Int. Cl.: G03B 21/14; G01B 11/25
U.S. Cl.: 353/69 ; 348/E5.137; 353/121; 353/28; 356/604
52 Claims

Abstract
Methods, systems, and computer program products for imperceptibly embedding structured light patterns in projected color images for display on planar and non-planar surfaces are disclosed. According to one method, an image exposure period for detecting an embedded structured light patterns in a projected image is selected based on analysis of pixel polarities for different pixel intensities of a pixel color. Pixel intensities for the color are varied in the user image so that pixel polarities encode the structured light patterns during image exposure period. The user image is projected with the structured light patterns onto the surface. Depth information is continuously acquired and used to adjust display of the user image.