Method and apparatus for detecting objects in an image
First Claim
Patent Images
1. A method of detecting generally rectangular objects in an image comprising using a processing unit to:
- determine candidate rectangles in the image based on detected corners in the image;
rank the candidate rectangles on the basis of a set of differentiating factors;
detect objects in said images based on the ranked candidate rectanglesestimate a background color of said image;
detect edges delimiting the objects on the basis of the estimated background color;
examine the edges to detect intersecting edges representing corners; and
group corners that define vertices of a rectangle thereby to determine the candidate rectangles.
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Abstract
A method of detecting generally rectangular objects in an image comprises determining candidate rectangles in the image based on detected corners in the image, ranking the candidate rectangles on the basis of a set of differentiating factors and detecting objects in the images based on the ranked candidate rectangles.
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Citations
15 Claims
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1. A method of detecting generally rectangular objects in an image comprising using a processing unit to:
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determine candidate rectangles in the image based on detected corners in the image; rank the candidate rectangles on the basis of a set of differentiating factors; detect objects in said images based on the ranked candidate rectangles estimate a background color of said image; detect edges delimiting the objects on the basis of the estimated background color; examine the edges to detect intersecting edges representing corners; and group corners that define vertices of a rectangle thereby to determine the candidate rectangles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for detecting generally rectangular objects in an image comprising:
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memory for storing the image; and a processing unit communicating with said memory, said processing unit processing the image to; determine candidate rectangles based on detected corners in the image; rank the candidate rectangles on the basis of a set of differentiating factors; determine objects in the images from the ranked candidate rectangles; estimate a background color of said image; detect edges delimiting the objects on the basis of the estimated background color; examine the edges to detect intersecting edges representing corners; and group corners that define vertices of a rectangle thereby to determine the candidate rectangles. - View Dependent Claims (14, 15)
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Specification