Re: Features Extraction

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 <[email protected]>:
> 
>> 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
>>
>>
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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 [email protected]