VERFAHREN FUER TEXTURBESCHREIBUNG UND WIEDERAUFFINDUNG VON TEXTURBILDERNMIT EINEM GABOR FILTER IM FREQUENZBEREICH
WO 200141071 A UPAB: 20011121 NOVELTY - The method involves converting an image in which an image of a time domain is transformed into an image of a frequency domain. The transformed image is filtered using a Gabor filter with NxM filtering regions. N and M are predetermined positive integers. Feature values of the Gabor-filter image are extracted in respective channels of a freq. domain division layout corresponding to the NxM filter regions of the Gabor filter. Finally the image texture descriptor is described using the texture feature values of the image. In the first step the image of the time domain is two-dimensional Fourier-transformed to be an image of an orthogonal co-ordinate system freq. domain. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for a recording media and for a texture-based image retrieval method. USE - For transforming an image of a time domain into an image of a freq. domain and extracting texture features by Gabor filtering. ADVANTAGE - Filtering is done in the freq. domain rather than the signal domain so as to reduce a filtering calculation time.
KR 1999-54904 A: 19991203