[mirtoolbox] Re: feature extraction (how to read all the feature values?)
- From: Olivier Lartillot <olivier.lartillot@xxxxxxxxxxxxx>
- To: mirtoolbox@xxxxxxxxxxxxx
- Date: Wed, 13 Aug 2008 17:00:40 +0300
Hello Alberto/everybody,
Yes, there is a simpler way to retrieve the data.
f = mirfeatures(...)
d = mirgetdata(f)
d is a structure array that respects the same arborescence than f. So
d.dynamics.rms will return a column vector corresponding to the RMS,
d.timbre.zerocross the zero-crossing rates, and so on.
d is a structure array instead of a matrix, because the various
features can have different sizes.
The complete list of features is documented in the user's guide, on
pages 128-129.
Regards
Olivier
Alberto Novello kirjoitti 12.8.2008 kello 17.06:
Hello Olivier/everybody,
i'm trying to develop a mdel using extracted features. I use
mirfeatures.
The output is quite complex in its architechture. I'm trying to
have it formatted in my own way: features on rows and values on the
columns.
I searched a lot in the three of output data and i found these way
of getting the values for the fatures:
mirgetdata(buf.feat.rhythm.tempo)
mirgetdata(buf.feat.rhythm.fluctuation.centroid)
mirgetdata(buf.feat.rhythm.attack.slope)
mirgetdata(buf.feat.rhythm.attack.time)
mirgetdata(buf.feat.tonal.hcdf)
mirgetdata(buf.feat.tonal.keyclarity)
mirgetdata(buf.feat.tonal.mode)
mirgetdata(buf.feat.timbre.centroid)
mirgetdata(buf.feat.timbre.brightness)
mirgetdata(buf.feat.timbre.ddmfcc.mirdata) %mat
mirgetdata(buf.feat.timbre.dmfcc.mirdata) %mat
mirgetdata(buf.feat.timbre.flatness)
mirgetdata(buf.feat.timbre.inharmonicity)
mirgetdata(buf.feat.timbre.irregularity)
mirgetdata(buf.feat.timbre.kurtosis)
mirgetdata(buf.feat.timbre.lowenergy)
mirgetdata(buf.feat.timbre.mfcc.mirdata) %mat
mirgetdata(buf.feat.timbre.rolloff85)
mirgetdata(buf.feat.timbre.rolloff95)
mirgetdata(buf.feat.timbre.roughness)
mirgetdata(buf.feat.timbre.skewness)
mirgetdata(buf.feat.timbre.spectentropy)
mirgetdata(buf.feat.timbre.spectralflux)
mirgetdata(buf.feat.timbre.spread)
mirgetdata(buf.feat.timbre.zerocross)
mirgetdata(buf.feat.pitch.salient)
mirgetdata(buf.feat.pitch.chromagram.centroid)
mirgetdata(buf.feat.pitch.chromagram.peak.mirdata)
mirgetdata(buf.feat.tmp.onsets.mirtemporal.mirdata)
mirgetdata(buf.feat.tmp.keystrengths.mirdata)
buf.feat.rhythm.fluctuation.peak.phase{1}{1}
Questions:
Is there a less indirect way of retrieving the data i need?
Are there all the extracted features here in the list i made?
Thanks
Alberto
Alberto Novello
Philips Research Laboratories Eindhoven
Digital Signal Processing, WO P088
Prof. Holstlaan 4
5656 AA Eindhoven
The Netherlands
tel: 0031-(0)-40-2743160
fax: 0031-(0)-40-2744675
mailto: alberto.novello@xxxxxxxxxxx
Olivier Lartillot
Finnish Centre of Excellence in Interdisciplinary Music Research
Department of Music
PO Box 35(M)
40014 University of Jyväskylä
Finland
http://users.jyu.fi/~lartillo/
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