This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
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Feature Detection
Using a variety of state-of-the-art methods, Mathematica provides immediate functions for detecting and extracting features in images and other arrays of data. Mathematica supports specific geometrical features such as edges and corners, as well as general keypoints that can be used to register and compare images.
Edge and Line Detection
EdgeDetect detect edges in an image using Canny and other methods
CrossingDetect, ContourDetect detect zeros and zero crossings
ImageLines find Hough lines in an image
    
Points-of-Interest Detection
ImageKeypoints find keypoints and associated feature vectors in an image
CornerFilter compute a measure for the presence of a corner
ImageCorrespondingPoints find corresponding keypoints in pairs of images
    
Region Detection
MinDetect, MaxDetect detect regional and extended minima and maxima
    
Radon, InverseRadon Radon and inverse Radon transforms
    
TextRecognize extract characters from an image
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