Methods and systems for automatic detection of corners of a region
First Claim
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1. A method for detecting corners of a region, the method comprising the steps of:
- Establishing a region of interest bounded by characteristic edge points;
detecting edges interior to the region of interest;
culling the detected edges in order to obtain a reduced edge group from the detected edges, the reduced edge group comprising a plurality of points;
selecting a plurality of candidate corner points based on a measure of cornerness obtained from the plurality of points; and
detecting region corner points from the plurality of candidate corner points based on a predetermined relationship between each of the candidate corner points and the characteristic edge points of the region of interest.
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Abstract
A method and system for detecting the corners of a region in an image.
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Citations
24 Claims
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1. A method for detecting corners of a region, the method comprising the steps of:
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Establishing a region of interest bounded by characteristic edge points; detecting edges interior to the region of interest; culling the detected edges in order to obtain a reduced edge group from the detected edges, the reduced edge group comprising a plurality of points; selecting a plurality of candidate corner points based on a measure of cornerness obtained from the plurality of points; and detecting region corner points from the plurality of candidate corner points based on a predetermined relationship between each of the candidate corner points and the characteristic edge points of the region of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for detecting corners of a region comprising:
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means for establishing a region of interest bounded by characteristic edge points; means for detecting edges interior to the region of interest; means for culling the detected edges in order to obtain a reduced edge group from the detected edges, the reduced edge group comprising a plurality of points; means for selecting a plurality of candidate corner points based on a measure of cornerness obtained from the plurality of points; and
,means for identifying region corner points from the plurality of candidate corner points based on a predetermined relationship between each candidate corner point and the characteristic edge points of the region of interest. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A computer program product comprising:
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a computer readable memory having computer readable code embodied therein, the computer readable code capable of causing a computer system to; establish a region of interest bounded by characteristic edge points; detect edges interior to the region of interest; cull the detected edges in order to obtain a reduced edge group from the detected edges, the reduced edge group comprising a plurality of points; obtain a measure of cornerness for each one point from the plurality of points; select a plurality of candidate corner points based on a measure of cornerness obtained from the plurality of points; and identify region corner points from the plurality of candidate corner points based on a predetermined relationship between each candidate corner point and the characteristic edge points of the region of interest. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification