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Re: [help-GIFT] Number of Images Returned

From: Henning Müller
Subject: Re: [help-GIFT] Number of Images Returned
Date: Mon, 30 Jun 2003 09:24:15 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3b) Gecko/20030210

I think that this happens when the images do not have a single feature in common with the query. Images get included into the scoreboard when they have a feature in common with the query, otherwise they will not get returned, you can assume their score to be zero, in this case. Most likely this will happen when you use pruning as not all features get used. In general there are a couple of very common histogram features such as black and white that are in almost every image.

Cheers, Henning

Sailesh Suvarna wrote:

Hello all,

When using Classical IDF and a Corel Collection of 2500 images,I noticed that 
GIFT does not always return all the 2500 images even if it were specified in 
the MRML request. It varies between 2100 and 2500 depending on the query.

What is the reason for this?

Sailesh Suvarna

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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 22 372-8680
email address@hidden

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