SIMULTANEOUS THREE-DIMENSIONAL GEOMETRY AND COLOR TEXTURE ACQUISITION USING SINGLE COLOR CAMERA
First Claim
1. A system for simultaneous real-time three-dimensional geometry and color texture acquisition of an object, comprising:
- a system processor for generating at least three phase shifted black and white fringe patterns by a three-step phase shifting algorithm;
a light projector adapted to project the at least three phase shifted black and white fringe patterns onto the object, the light projector being electrically connected with the system processor; and
a color camera for capturing the at least three phase shifted black and white fringe patterns reflected from the object to generate at least three raw fringe images;
wherein the raw fringe images acquired by the color camera are processed by the system processor for simultaneous real-time three-dimensional geometry and color texture acquisition.
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Abstract
A system for simultaneous real-time three-dimensional geometry and color texture acquisition. The system includes a system processor for generating at least three phase shifted black and white fringe patterns with a phase shift of 2 π/3, a light projector adapted to project the fringe patterns onto an object, the projector being electrically connected with the system processor, and a color camera for capturing the fringe patterns to generate at least three raw fringe images. The fringe images are used to calculate a black and white texture image which is further converted to a color image by employing a demosaicing algorithm. The fringe images are also used to calculate a wrapped phase map that is further processed to generate a continuous unwrapped phase map by employing a phase unwrapping algorithm and the unwrapped phase map is converted to co-ordinates using calibrated system parameters for point-by-point three-dimensional shape measurement.
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Citations
15 Claims
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1. A system for simultaneous real-time three-dimensional geometry and color texture acquisition of an object, comprising:
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a system processor for generating at least three phase shifted black and white fringe patterns by a three-step phase shifting algorithm; a light projector adapted to project the at least three phase shifted black and white fringe patterns onto the object, the light projector being electrically connected with the system processor; and a color camera for capturing the at least three phase shifted black and white fringe patterns reflected from the object to generate at least three raw fringe images; wherein the raw fringe images acquired by the color camera are processed by the system processor for simultaneous real-time three-dimensional geometry and color texture acquisition. - View Dependent Claims (2, 3, 4, 5)
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6. A method for simultaneous real-time three-dimensional geometry and color texture acquisition, comprising the steps of:
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generating at least three phase shifted black and white fringe patterns with a phase shift of 2π
/3 by a system processor utilizing a three step phase shifting algorithm and sending the fringe patterns to a light projector;projecting the phase shifted fringe patterns onto an object by the light projector which is electrically connected with the system processor; capturing the phase shifted fringe patterns reflected from the object by a color camera to generate at least three raw fringe images; calculating a wrapped phase map using the raw fringe images; processing the wrapped phase map to generate a continuous unwrapped phase map by employing a phase unwrapping algorithm and converting the continuous unwrapped phase map to co-ordinates using calibrated system parameters for point by point three-dimensional shape measurement; producing a black and white texture image by using the raw fringe images; and converting the black and white texture image to a color image by employing a demosaicing algorithm. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification