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Dominant colour descriptor with spatial information for Content-based Image Retrieval

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4 Author(s)
Mustaffa, M.R. ; Dept. of Multimedia, Univ. Putra Malaysia, Serdang ; Ahmad, F. ; Rahmat, R.W.O.K. ; Mahmod, R.

an important problem in colour content-based image retrieval (CBIR) is the lack of an effective way to represent both the colour and spatial information of an image. In order to solve this problem, a new dominant colour descriptor that employs spatial information of image is proposed. A maximum of three dominant colour regions in an image together with their respective coordinates of the minimum-bounding rectangle (mbr) are first extracted using the colour-based dominant region segmentation. The Improved sub-block technique is then used to determine the location of the dominant colour regions by taking into consideration the total horizontal and vertical distances of a region at each location where it overlaps. A query-by-example CBIR system implementing the colour-spatial technique is developed. Experimental studies on an image database consisting of 900 images are conducted. From the experiments, it is evident that retrieval effectiveness has significantly improved by 85.86%.

Published in:

Information Technology, 2008. ITSim 2008. International Symposium on  (Volume:3 )

Date of Conference:

26-28 Aug. 2008

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