Method and apparatus for absolute-coordinate three-dimensional surface imaging
First Claim
1. A method of determining absolute coordinates of a three-dimensional surface of an object, the method comprising:
- projecting only two phase-shifted illumination patterns, wherein each of the illumination patterns encodes a marker, onto the surface of the object;
projecting a uniform illumination pattern onto the surface of the object;
capturing images of reflections of the illumination patterns from the surface of the object, including a black and white texture of the object surface;
combining the captured images as to generate a phase-wrapped image;
generating a relative unwrapped phase image by unwrapping the phase-wrapped image;
generating an absolute phase image from the relative unwrapped phase image; and
determining absolute coordinates of the surface of the object from the absolute phase image as well as surface texture of the object at said coordinates.
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Accused Products
Abstract
A method and associated apparatus for capturing an image of a 3D object (100) which encodes the surface geometry of at least a portion of the object, comprising: 1. projecting (304) a plurality of fringe patterns (312A, 314A) onto the object; 2. capturing (306) phase alterations in reflections of the fringe patterns (312B, 314B) from the object; 3. projecting a uniform image (310A) onto the object; 4. capturing a reflection of the uniform image (310B) from the object; and 5. combining (310) captured phase alterations and captured uniform image reflection on a pixel-by-pixel basis, thereby forming a holoimage representation of the object.
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Citations
35 Claims
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1. A method of determining absolute coordinates of a three-dimensional surface of an object, the method comprising:
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projecting only two phase-shifted illumination patterns, wherein each of the illumination patterns encodes a marker, onto the surface of the object; projecting a uniform illumination pattern onto the surface of the object; capturing images of reflections of the illumination patterns from the surface of the object, including a black and white texture of the object surface; combining the captured images as to generate a phase-wrapped image; generating a relative unwrapped phase image by unwrapping the phase-wrapped image; generating an absolute phase image from the relative unwrapped phase image; and determining absolute coordinates of the surface of the object from the absolute phase image as well as surface texture of the object at said coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for determining absolute coordinates of a three-dimensional surface of an object, the apparatus comprising:
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at least one illumination pattern generator for generating only two phase-shifted and one uniform illumination patterns, wherein each of the illumination patterns encodes a phase marker; at least one projection device for projecting the illumination patterns onto the surface of the object; at least one imaging device for capturing images of reflections of the illumination patterns from the surface of the object; and at least one image processor for processing the captured images to determine the surface texture of the object and the absolute coordinates of the surface of the object as a function of a decoded phase of the marker. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification