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US 8,526,717 B2Granted
Rich color transition curve tracking method
AssigneesVision Interface Technologies, LLC, Creative Lifestyles, Inc.
InventorsPeter Harmon Smith, Frank Meyer, John Frederick Cloyd, Bora Tekkanat
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Abstract
A method of finding targets in a color image applies ratio space rich colored filtering to identify a band of pixels that form a transition zone from one rich color to another. This pixel band is reduced to a rich color transition curve. A set of transition curves with simple geometric and color properties for the entire image, can be compared to a database of target properties to identify a target in an image.
Claims21
A method of identifying a target in an image comprising the steps of:
- using a computer processor to perform the steps of:
- defining a ratio color space determining the largest color component value for each pixel in an image;
- testing each pixel for the presence of a rich target color;
- finding at least two pixels of different rich color types separated by a tolerance;
- and
- using the at least two pixels to locate a target in the image.
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