08422782 is referenced by 18 patents and cites 54 patents.

Systems and methods are provided for creating contour images that represent the contour of objects reflected in images, calculating contour histogram descriptors of the contour images, and classifying images based in part on the histogram descriptors of the contour images. For example, a contour image of an image is created. A radial-polar grid having a plurality of radial-polar bins is then positioned on the contour image. A contour histogram descriptor is created to include a number of bins that correspond to the radial-polar bins of the radial-polar grid, where the contents of the bins of the contour histogram descriptor represent the number of pixels of the contour image that are located in the corresponding radial-polar bins of the radial-polar grid. Images are classified at least based in part on comparisons between contour histogram descriptors of the images and contour histogram descriptors of training images.

Title
Contour detection and image classification
Application Number
12/895506
Publication Number
8422782 (B1)
Application Date
September 30, 2010
Publication Date
April 16, 2013
Inventor
Sunil Ramesh
San Jose
CA, US
Arnab Dhua
Sunnyvale
CA, US
Agent
Novak Druce Connolly Bove Quigg
Assignee
A9 com
CA, US
IPC
G06K 9/56
G06K 9/48
G06K 9/00
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