Extraction of image or video features

Full Title

Arrangements for image or video recognition or understanding (character recognition in images or video G06V30/10) > Extraction of image or video features

Child Classifications

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• G06V 10/42 Global feature extraction by analysis of the whole pattern, e.g. using frequency domain transformations or autocorrelation
• G06V 10/44 Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
• G06V 10/46 Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features (colour feature extraction G06V10/56)
• G06V 10/48 by mapping characteristic values of the pattern into a parameter space, e.g. Hough transformation
• G06V 10/50 by performing operations within image blocks; by using histograms, e.g. histogram of oriented gradients [HoG]; by summing image-intensity values; Projection analysis
• G06V 10/513
• G06V 10/52 Scale-space analysis, e.g. wavelet analysis (multi-scale boundary representations G06V10/42)
• G06V 10/54 relating to texture
• G06V 10/56 relating to colour
• G06V 10/58 relating to hyperspectral data
• G06V 10/60 relating to illumination properties, e.g. using a reflectance or lighting model
• G06V 10/62 relating to a temporal dimension, e.g. time-based feature extraction; Pattern tracking