Depth mapping using projected patterns
AssigneePrime Sense Ltd
InventorsBarak Freedman, Alexander Shpunt, Meir Machline, Yoel Arieli
Life of this patent
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Abstract
Apparatus for mapping an object includes an illumination assembly, which includes a single transparency containing a fixed pattern of spots. A light source transilluminates the single transparency with optical radiation so as to project the pattern onto the object. An image capture assembly captures an image of the pattern that is projected onto the object using the single transparency. A processor processes the image captured by the image capture assembly so as to reconstruct a three-dimensional (3D) map of the object.
Claims30
Apparatus for mapping an object, comprising:
- an illumination assembly, comprising:
- a transparency containing an uncorrelated pattern of spots having a spatial duty cycle that is less than 1/e;
- and
- a light source, which is configured to transilluminate the transparency with optical radiation so as to project the uncorrelated pattern onto the object;
- an image capture assembly, which is configured to capture, from a single, fixed location and angle relative to the illumination assembly, an image of the uncorrelated pattern that is projected onto the object using the single transparency;
- and
- a processor, which is coupled to process the image captured by the image capture assembly only from the single, fixed location and angle relative to the illumination assembly so as to reconstruct a three-dimensional (3D) map of the object.
Apparatus for mapping an object, comprising:
- an illumination assembly, comprising:
- a transparency containing an uncorrelated pattern of spots arranged in a plurality of parallel bands, repeating periodically in a first direction, each band containing a replica of the uncorrelated pattern extending across at least a part of the transparency in a second direction, perpendicular to the first direction;
- and
- a light source, which is configured to transilluminate the transparency with optical radiation so as to project the uncorrelated pattern onto the object;
- an image capture assembly, which is configured to capture, from a single, fixed location and angle relative to the illumination assembly, an image of the uncorrelated pattern that is projected onto the object using the single transparency;
- and
- a processor, which is coupled to process the image captured by the image capture assembly only from the single, fixed location and angle relative to the illumination assembly so as to reconstruct a three-dimensional (3D) map of the object.
A method for mapping an object, comprising:
- transilluminating a transparency containing an uncorrelated pattern of spots having a spatial duty cycle that is less than 1/e so as to project the uncorrelated pattern onto the object;
- capturing an image from a single, fixed location and angle relative to the transparency of the uncorrelated pattern that is projected onto the object;
- and
- processing the image captured only from the single, fixed location so as to reconstruct a three-dimensional (3D) map of the object.
A method for mapping an object, comprising:
- transilluminating a transparency containing an uncorrelated pattern of spots arranged in a plurality of parallel bands, repeating periodically in a first direction, each band containing a replica of the uncorrelated pattern extending across at least a part of the transparency in a second direction, perpendicular to the first direction, so as to project the uncorrelated pattern onto the object;
- capturing an image from a single, fixed location and angle relative to the transparency of the uncorrelated pattern that is projected onto the object;
- and
- processing the image captured only from the single, fixed location so as to reconstruct a three-dimensional (3D) map of the object.
Dependencies are inferred from the claim text.