Re: [help-GIFT] Features Extraction

[Henning Müller]

Hi,

the numbers you are getting should be feature number and frequency. The 
feature extraction program in the FeatureExtraction directory allows you 
to create a list of all 80'000 features and what exactly they correspond to.
InvertedFileFeatureDescription.db in your indexing directory already 
makes an association between feature number and features class (0-3, for 
Gabor, color blocks, Gabor, color histogram).
If you read some of the early Viper papers this is described in more detail.

Cheers, Henning

Epa Uwimana wrote:
> Here is the script:
>
> open FILE,shift;
> read(FILE,$lString,4);
> print unpack("I",$lString),"\n";
> while(read(FILE,$lString,8)){
>         print join(":",unpack("If",$lString)),"\n";
> }
> I figured out that I had a typo in my script but even after fixing it, I
> am getting a lot of number that I have no ideas what they are and now I
> am wondering if they are right.
> Try to run the attached image and let me know what the result would mean
> I am interested in knowing what every number stands for i.e RGB,HSV,
> Energy,Histogram and others
>
> Thanks again
>
> Epa Uwimana
>
> Quoting Wolfgang Müller <address@hidden>:
>
> > Dear all,
> >
> > > I am interested in features for each image. I remember reading from
> > one
> > > literature that you extract around 7800 features per image and I
> > was
> > > wondering if there is a way I can extract these from the .fts.
> > > I received one perl script from Dr. Muller and the script doesn't
> > seem
> > > to work correctly. Do you have the script that he mentioned you can
> > send
> > > to the list?
> > Could you please post the script to the list? AFAIR it is simply
> > using the>  
> > perl unpack function. Of course one would need to compare the exact
> > script>  
> > with the exact c++ code.
> >
> > There is also the code to read a feature list in the inverted file
> > accessor>  
> > within GIFT which is known to work.
> >
> > Cheers,
> > Wolfgang
> >
> > --
> > Dr. Wolfgang Müller
> > LS Medieninformatik
> > Universität Bamberg
> > Check out the SIG MM web site http://www.sigmm.org
> >
> >
> > _______________________________________________
> > help-GIFT mailing list
> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/help-gift
> >
> >
> >
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> >
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--
 ---------------------------------------
 Henning Müller (PhD)
 University & Hospitals of Geneva
 Service of Medical Informatics
 24, rue Micheli-du-Crest
 CH-1211 Geneva 14, Switzerland
 Tel  +41 22 372-6175
 Fax  +41 22 372-8680
 email address@hidden