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.


Points-of-Interest Detection

ImageKeypoints find keypoints and associated feature vectors in an image

ImageCorners find corners

CornerFilter compute a measure for the presence of a corner

Contour 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

GradientFilter ▪ LaplacianGaussianFilter ▪ ImageFilter ▪ ImageConvolve

Extrema Detection

MinDetect, MaxDetect detect regional and extended minima and maxima

TextRecognize extract characters from an image

FindFaces find human faces in an image

Feature Tracking

ImageCorrespondingPoints find corresponding keypoints in pairs of images

ImageFeatureTrack track features across a sequence of images

Image Transforms

Radon, InverseRadon Radon and inverse Radon transforms

ImagePeriodogram squared magnitude of the Fourier transform

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