| 摘要 |
A colour image processing apparatus for retrieving a colour feature descriptor for describing colour features of an image comprises: a colour vector retrieving unit (302) for receiving pixel value data of an input image and retrieving colour vectors for a predetermined colour coordinate system; a colour feature descriptor generating unit (304) for obtaining at least one class of the colour vectors by classifying the colour vectors based on a distribution of values of the colour vectors, obtaining at least one dominant colour and ratio thereof from the at least one class and generating and outputting colour feature descriptor data containing the information on the at least one dominant colour and ratio thereof and a combining unit (306) for combining pixel value data and colour feature descriptor data to output a processed image. A colour image processing apparatus for retrieving a colour feature descriptor for describing colour features of an image, comprises: a segmenting unit (300) for segmenting an input image into k regions, wherein k is an arbitrary positive integer, and sequentially outputting pixel value data corresponding to the kth region; a colour vector retrieving unit (302) for receiving pixel value data of an input image and retrieving colour vectors for a predetermined colour coordinate system and a colour feature descriptor generating unit (304) for obtaining the percentiles of dominant colours represented by the colour vectors when the colour vectors are all received and generating and outputting colour feature descriptor data containing the information on the dominant colours and the percentiles thereof. A colour vector is defined by the expression [cLi, cUi, cVi] where i is an arbitrary serial number of primary regions ranging from 1 to N and L, U and V denote coordinates of the CIE LUV colour coordinate system. The colour feature descriptor (F) is defined by the expression {{[cLi, cUi, cVi], Pi} I=1, _, N} where Pi is the percentile relating to the colour vector [cLi, cUi, cVi]. |
