Distance-Varying Illumination and Imaging Techniques for Depth Mapping
First Claim
Patent Images
1. A method for mapping, comprising:
- projecting a pattern onto an object via an astigmatic optical element having different, respective focal lengths in different meridional planes of the element;
capturing an image of the pattern on the object; and
processing the image so as to derive a three-dimensional (3D) map of the object responsively to the different focal lengths.
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Abstract
A method for mapping includes projecting a pattern onto an object (28) via an astigmatic optical element (38) having different, respective focal lengths in different meridional planes (54, 56) of the element. An image of the pattern on the object is captured and processed so as to derive a three-dimensional (3D) map of the object responsively to the different focal lengths.
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Citations
32 Claims
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1. A method for mapping, comprising:
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projecting a pattern onto an object via an astigmatic optical element having different, respective focal lengths in different meridional planes of the element; capturing an image of the pattern on the object; and processing the image so as to derive a three-dimensional (3D) map of the object responsively to the different focal lengths. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for mapping, comprising:
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directing light via an aperture so as to project onto an object a diffraction pattern characterized by a transition from near-field to far-field diffraction; capturing an image of the diffraction pattern on the object; and processing the image so as to derive a three-dimensional (3D) map of the object responsively to the transition of the diffraction pattern. - View Dependent Claims (9)
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10. A method for mapping, comprising:
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capturing an image of an object, which has a surface with features having respective shapes at respective locations on the surface, using an optical objective that is configured to modify the shapes of the features in the image as a function of a distance of the respective locations from the objective; and processing the image so as to derive a three-dimensional (3D) map of the object responsively to the modified shapes of the features. - View Dependent Claims (11, 12, 13, 14)
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15. A method for mapping, comprising:
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projecting a pattern having a size characteristic onto an object from an illumination assembly at a first distance from the object; capturing an image of the pattern on the object using an image capture assembly at a second distance from the object, which is different from the first distance; and processing the image so as to derive a three-dimensional (3D) map of the object responsively to the size characteristic of the pattern in the image and to a difference between the first and second distances. - View Dependent Claims (16)
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17. Apparatus for mapping, comprising:
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an illumination assembly, which comprises an astigmatic optical element having different, respective focal lengths in different meridional planes of the element and is configured to project a pattern onto an object via the astigmatic optical element; an image capture assembly, which is configured to capture an image of the pattern on the object; and an image processor, which is configured to process the image so as to derive a three-dimensional (3D) map of the object responsively to the different focal lengths. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. Apparatus for mapping, comprising:
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an illumination assembly, which comprises an aperture and is configured to direct light via the aperture so as to project onto an object a diffraction pattern characterized by a transition from near-field to far-field diffraction; an image capture assembly, which is configured to capture an image of the diffraction pattern on the object; and an image processor, which is configured to process the image so as to derive a three-dimensional (3D) map of the object responsively to the transition of the diffraction pattern. - View Dependent Claims (25)
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26. Apparatus for mapping, comprising:
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an image capture assembly, which is configured to capture an image of an object, which has a surface with features having respective shapes at respective locations on the surface, and comprises an optical objective that is configured to modify the shapes of the features in the image as a function of a distance of the respective locations from the objective; and an image processor, which is configured to process the image so as to derive a three-dimensional (3D) map of the object responsively to the modified shapes of the features. - View Dependent Claims (27, 28, 29, 30)
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31. Apparatus for mapping, comprising:
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an illumination assembly, which is located at a first distance from an object and is configured to project a pattern having a size characteristic onto the object; an image capture assembly, which is located at a second distance from the object, which is different from the first distance, and is configured to capture an image of the pattern on the object; and an image processor, which is configured to process the image so as to derive a three-dimensional (3D) map of the object responsively to the size characteristic of the patter in the image and to a difference between the first and second distances. - View Dependent Claims (32)
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Specification