System and method for measuring form and position tolerances of an object
AssigneesHONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., Hon Hai Precision Industry Co., Ltd.
InventorsChih-Kuang Chang, Xin-Yuan Wu, Min Wang
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Abstract
A method for measuring form and position tolerances of an object receives a preselected feature element to be fitted from an image of a measured object, obtains a reference feature element from an image of a reference object corresponding to the measured object. The method further fits a feature element corresponding to the preselected feature element so as to obtain a fitted feature element, and calculates form and position tolerances between the fitted feature element and the reference feature element thereby generating the form and position tolerances of the measured object.
Claims20
A computer-implemented method for measuring form and position tolerances of an object, the method comprising:
- (a) receiving an image of a measured object and a preselected feature element to be fitted from the image stored in a storage device;
- (b) dividing the image of the measured object into a plurality of triangular grids, so as to obtain point clouds of the image of the measured object;
- (c) receiving a reference feature element selected from an image of a reference object corresponding to the measured object;
- (d) retrieving uppermost boundary points from the plurality of triangular grids;
- (e) fitting the retrieved uppermost boundary points to a feature element;
- (f) calculating form and position tolerances between the fitted feature element and the reference feature element;
- and
- (g) outputting an analysis report to show the form and position tolerances on a display device.
A non-transitory storage medium having stored thereon instructions that, when executed by a processor of a computer, cause the processor to perform a method for measuring form and position tolerances of an object, the method comprising:
- (a) receiving an image of a measured object and a preselected feature element to be fitted from the image stored in a storage device;
- (b) dividing the image of the measured object into a plurality of triangular grids, so as to obtain point clouds of the image of the measured object;
- (c) receiving a reference feature element selected from an image of a reference object corresponding to the measured object;
- (d) retrieving uppermost boundary points from the plurality of triangular grids;
- (e) fitting the retrieved uppermost boundary points to a feature element;
- (f) calculating form and position tolerances between the fitted feature element and the reference feature element;
- and
- (g) outputting an analysis report to show the form and position tolerances on a display device.
A computing system for measuring form and position tolerances of an object, comprising:
- a storage device for storing point clouds of an object;
- an obtaining module operable to receive an image of a measured object and a preselected feature element to be fitted from the image stored in the storage device;
- a gridding module operable to divide the image of the measured object into a plurality of triangular grids, so as to obtain point clouds of the image of the measured object;
- the obtaining module further operable to receive a reference feature element selected from an image of a reference object corresponding to the measured object;
- a retrieving module operable to retrieve uppermost boundary points from the plurality of triangular grids;
- a fitting module operable to fit the retrieved uppermost boundary points to a feature element;
- a calculating module operable to calculate form and position tolerances between the fitted feature element and the reference feature element;
- and
- an outputting module operable to output an analysis report to show the form and position tolerances on a display device.
Dependencies are inferred from the claim text.