System and method for detecting features from images of vehicles
First Claim
Patent Images
1. A method of detecting a feature of a vehicle in an image of said vehicle, said method comprising the steps of:
- providing a digitized image of said vehicle, said image comprising a plurality of intensities corresponding to a domain of points on an 2-dimensional grid;
providing a first filter mask over a first subdomain of said image, wherein said filter mask is placed to detect a feature in said image;
calculating a function of a gradient of said image inside said first masked subdomain; and
detecting the presence or absence of a vehicle feature within said first masked subdomain based on the value of said gradient function.
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Abstract
A method of detecting a feature of a vehicle in an image of a vehicle includes providing a digitized image of a vehicle, providing a first filter mask over a first subdomain of the image, where the filter mask is placed to detect a feature in the image, calculating a function of a gradient of the image inside the first masked subdomain, and detecting the presence or absence of a vehicle feature within the first masked subdomain based on the value of the gradient function.
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Citations
26 Claims
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1. A method of detecting a feature of a vehicle in an image of said vehicle, said method comprising the steps of:
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providing a digitized image of said vehicle, said image comprising a plurality of intensities corresponding to a domain of points on an 2-dimensional grid;
providing a first filter mask over a first subdomain of said image, wherein said filter mask is placed to detect a feature in said image;
calculating a function of a gradient of said image inside said first masked subdomain; and
detecting the presence or absence of a vehicle feature within said first masked subdomain based on the value of said gradient function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of detecting a feature of a vehicle in an image of said vehicle, said method comprising the steps of:
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providing a digitized image of said vehicle, said image comprising a plurality of intensities corresponding to a domain of points on an 2-dimensional grid;
providing at least one filter mask over a subdomain of said image, wherein said filter mask is placed to detect a feature in said image, wherein the size and position of said at least one filter mask are varied to obtain a set of said features; and
calculating a sum of an absolute value of the log gradient over all pixels in said masked subdomain. - View Dependent Claims (14)
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15. A program storage device readable by a computer, tangibly embodying a program of instructions executable by the computer to perform the method steps for detecting a feature of a vehicle in an image of said vehicle, said method comprising the steps of:
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providing a digitized image of said vehicle, said image comprising a plurality of intensities corresponding to a domain of points on an 2-dimensional grid;
providing a first filter mask over a first subdomain of said image, wherein said filter mask is placed to detect a feature in said image;
calculating a function of a gradient of said image inside said first masked subdomain; and
detecting the presence or absence of a vehicle feature within said first masked subdomain based on the value of said gradient function. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification