Auto-referenced sensing device for three-dimensional scanning
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United States of America Patent
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Mar 20, 2012
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app pub date -
Dec 3, 2010
filing date -
Mar 11, 2005
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Abstract
An auto-referenced sensing device for scanning an object to provide three-dimensional surface points, including: a Light-Emitting Diode (LED) light source emitting light for illuminating and enabling image acquisition of retro-reflective target positioning features provided at a fixed position on the object; a laser pattern projector, additional to the LED light source, for providing a projected laser pattern on a surface of the object for illuminating and enabling image acquisition of dense points between the retro-reflective target positioning features; at least a pair of cameras for simultaneously acquiring a 2D image of the object, the projected laser pattern and the retro-reflective target positioning features are apparent on the image, wherein the simultaneous images contain both positioning measurements from the retro-reflective target positioning features and dense surface measurements from the points enabled by the projected laser pattern.
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