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Re: [help-GIFT] Adding and removing images to/from gift

From: Wolfgang Müller
Subject: Re: [help-GIFT] Adding and removing images to/from gift
Date: Tue, 12 Sep 2006 10:29:11 +0200
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> thank you for that resumee. Does this apply to deleting images as well ?

Yes. Unless you simply leave them in the collection and use a blacklist of 
stale inverted file entries.

> Currently I still scratch my head about HOW
> I merge the "small inverted file" with the big one. Or can I use both
> together in conjunction within the same collection ?

Recent work suggests that you have a hierarchy of inverted files. Each file 
smaller by a factor than the previous one. You use them in parallel, i.e. you 
are running several queries at the same time on different query engines. Then 
you merge the results.

A good approximation of such behavior could be achieved by properly hacking :-) and properly using the GIFT's elaborate query 
engine construction mechanism in gift-config.mrml. The missing bit in such an 
approach would be that the statistics about each feature would not be shared 
among the huge/large/small/tiny inverted files. This would be not so good for 
the ranking, but nothing a small hack couldn't cure ;-) .


Dr. Wolfgang Müller
LS Medieninformatik
Universität Bamberg
Check out the SIG MM web site

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