Z-axis optical detection of mechanical feature height
First Claim
Patent Images
1. A method for detecting height attributes of an object, the method comprising the steps of:
- creating from an image of the object, a feature histogram of each of a plurality of selected features of the object;
a) calculating a mean value for each of the feature histograms created;
b) calculating an average value of the plurality of calculated mean values;
c) determining from the average value, a range of acceptable values according to predetermined criteria;
d) analyzing each calculated mean value to determine if it is within the range of acceptable values.
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Abstract
Height attributes of features of an object having a plurality of physical features thereon is determined by illuminating the features of the object at a low angle and capturing the reflected light at a camera mounted along the z-axis perpendicular to the object. The reflected light from the features is analyzed to determine if any of the features is of an unacceptable height. The reflected light being either brighter or dimmer than the average determines that the corresponding feature is higher or lower respectively than the average feature.
24 Citations
20 Claims
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1. A method for detecting height attributes of an object, the method comprising the steps of:
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creating from an image of the object, a feature histogram of each of a plurality of selected features of the object;
a) calculating a mean value for each of the feature histograms created;
b) calculating an average value of the plurality of calculated mean values;
c) determining from the average value, a range of acceptable values according to predetermined criteria;
d) analyzing each calculated mean value to determine if it is within the range of acceptable values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for detecting height attributes of an object, the system comprising:
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a memory;
a computer system in communication with the memory;
a camera in communication with the computer system;
a light source projecting light on features of the object wherein the computer system includes instructions to execute a method comprising;
creating from an image of the object, a feature histogram of each of a plurality of selected features of the object;
a) calculating a mean value for each of the feature histograms created;
b) calculating an average value of the plurality of calculated mean values;
c) determining from the average value, a range of acceptable values according to predetermined criteria;
d) analyzing each calculated mean value to determine if it is within the range of acceptable values. - View Dependent Claims (12, 13, 14, 15)
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16. A computer program product for detecting height attributes of an object, the computer program product comprising:
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a storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising;
creating from an image of the object, a feature histogram of each of a plurality of selected features of the object;
a) calculating a mean value for each of the feature histograms created;
b) calculating an average value of the plurality of calculated mean values;
c) determining from the average value, a range of acceptable values according to predetermined criteria;
d) analyzing each calculated mean value to determine if it is within the range of acceptable values. - View Dependent Claims (17, 18, 19, 20)
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Specification