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From: | Henning Müller |
Subject: | Re: [help-GIFT] Colour blocks |
Date: | Fri, 22 Aug 2003 16:29:25 +0200 |
User-agent: | Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3b) Gecko/20030210 |
Hi,no, for the blocks no histogram is stored but only the mode color, which is the most frequent color in this block. Find information on mode here: http://www.kaptest.com/pdf_files/Lesson8B_Math_SAT9_MS.pdf This is done at various scales, first the image is divided into four blocks and then each of the block is divided into four smaller blocks again. Each color in any of the blocks is a feature, resulting in (4+16+64+256)x166 features.
Cheers, Henning Madhvi WAHI wrote:
Hi, According to the paper--"Content-based query of image databases, inspirations from text retrieval: inverted files, frequency-based weights and relevance feedback; two sets of features are extracted from the quantized HSV colour space, the first, a colour histogram and the second, colour blocks. Are the colour blocks the same as histograms, that is, once the images are divided at four scales, are histograms calculated for each of these four regions, to record the local information? Also, what is the meaning of mode colour being calculated for each block? Thanks, M. Wahi, Student--RMIT. _______________________________________________ help-GIFT mailing list address@hidden http://mail.gnu.org/mailman/listinfo/help-gift
-- --------------------------------------- Dr. Henning Müller University Hospitals of Geneva Division of Medical Informatics 21, rue Micheli-du-Crest CH-1211 Geneva 4, Switzerland Tel +41 22 372-6175 Fax +41 22 372-8680email address@hidden
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