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answered 2013-04-22 14:05:10 -0600
For this you can use the features2D part of openCV. Take a look at this tutorials, which apply a feature detector, descriptor and a matcher:
http://docs.opencv.org/doc/tutorials/features2d/table_of_content_features2d/table_of_content_features2d.html#table-of-content-feature2d