Non-contact probe
First Claim
1. A non-contact measurement apparatus, comprising:
- a probe configured to be mounted on a coordinate positioning apparatus, comprising an imaging device for capturing an image of an object to be measured;
a processor configured to;
a) analyse at least one first image of an object obtained by the imaging device from a first perspective and at least one second image of the object obtained by the imaging device, which is the same imaging device used to obtain the at least one first image of the object, from a second perspective so as to identify in each of the at least one first image and the at least one second image of the object at least one common photogrammetric target feature on the object to be measured, determine the two-dimensional coordinates of the at least one common photogrammetric target feature on the object within each image, and then, based on knowledge of the relative location and orientation of the imaging device that took the images, determine the three dimensional coordinates of the at least one common photogrammetric target feature; and
b) obtain topographical data regarding a form of a surface of the object via analysis of the distortion of a structured light pattern projected on the object caused by height variation on the surface of the object as imaged in at least one image, obtained by the imaging device, which is the same imaging device used to obtain the at least one first image and the at least one second image of the object,wherein the non-contact measurement apparatus being further configured to use both the data obtained from a) and b) to provide a 3D point cloud that describes the shape of the object.
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Abstract
A non-contact measurement apparatus and method. A probe is provided for mounting on a coordinate positioning apparatus, comprising at least one imaging device for capturing an image of an object to be measured. Also provided is an image analyzer configured to analyze at least one first image of an object obtained by the probe from a first perspective and at least one second image of the object obtained by the probe from a second perspective so as to identify at least one target feature on the object to be measured. The image analyzer is further configured to obtain topographical data regarding a surface of the object via analysis of an image, obtained by the probe, of the object on which an optical pattern is projected.
74 Citations
36 Claims
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1. A non-contact measurement apparatus, comprising:
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a probe configured to be mounted on a coordinate positioning apparatus, comprising an imaging device for capturing an image of an object to be measured; a processor configured to; a) analyse at least one first image of an object obtained by the imaging device from a first perspective and at least one second image of the object obtained by the imaging device, which is the same imaging device used to obtain the at least one first image of the object, from a second perspective so as to identify in each of the at least one first image and the at least one second image of the object at least one common photogrammetric target feature on the object to be measured, determine the two-dimensional coordinates of the at least one common photogrammetric target feature on the object within each image, and then, based on knowledge of the relative location and orientation of the imaging device that took the images, determine the three dimensional coordinates of the at least one common photogrammetric target feature; and b) obtain topographical data regarding a form of a surface of the object via analysis of the distortion of a structured light pattern projected on the object caused by height variation on the surface of the object as imaged in at least one image, obtained by the imaging device, which is the same imaging device used to obtain the at least one first image and the at least one second image of the object, wherein the non-contact measurement apparatus being further configured to use both the data obtained from a) and b) to provide a 3D point cloud that describes the shape of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20, 21, 22)
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11. A device for use in a non-contact measurement apparatus that includes a probe that is configured to be mounted on a coordinate positioning apparatus, having an imaging device for capturing an image of an object to be measured, the device comprising:
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a processor configured to; a) analyse at least one first image of an object obtained by the imaging device from a first perspective and at least one second image of the object obtained by the imaging device, which is the same imaging device used to obtain the at least one first image of the object, from a second perspective so as to identify in each of the at least one first image and the at least one second image of the object at least one common photogrammetric target feature on the object to be measured, determine the two-dimensional coordinates of the at least one common photogrammetric target feature on the object within each image, and then, based on knowledge of the relative location and orientation of the imaging device that took the images, determine the three dimensional coordinates of the at least one common photogrammetric target feature; and b) obtain topographical data regarding a form of a surface of the object via analysis of the distortion of a structured light pattern projected on the object caused by height variation on the surface of the object as imaged in at least one image, obtained by the imaging device, which is the same imaging device used to obtain the at least one first image and the at least one second image of the object, wherein the device being further configured to use both the data obtained from a) and b) to provide a 3D point cloud that describes the shape of the object.
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12. A non-contact method for measuring an object located within a measurement space using a probe comprising an imaging device, the method comprising:
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a) analysing at least one first image of an object obtained by the imaging device from a first perspective and at least one second image of the object obtained by the imaging device, which is the same imaging device used to obtain the at least one first image of the object, from a second perspective so as to identify in each of the at least one first image and the at least one second image of the object at least one common photogrammetric target feature on the object to be measured, determining the two-dimensional coordinates of the at least one common photogrammetric target feature on the object within each image, and then, based on knowledge of the relative location and orientation of the imaging device that took the images, determining the three dimensional coordinates of the at least one common photogrammetric target feature; and b) obtaining topographical data regarding a form of a surface of the object via analysis of the distortion of a structured light pattern projected on the object caused by height variation on the surface of the object as imaged in at least one image, obtained by the imaging device, which is the same imaging device used to obtain the at least one first image and the at least one second image of the object, wherein both the data obtained from a) and b) is used to provide a 3D point cloud that describes the shape of the object. - View Dependent Claims (13, 14, 15, 16, 17, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification