wavelet
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Dr G Jaffino
on 27 Oct 2011
Answered: maryam mosaffa
on 14 Jan 2018
For octave wavelet coefficients feature extraction take all the 8 wavelet coefficients or take only for 8th coefficient?
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Accepted Answer
Wayne King
on 27 Oct 2011
Hi Jaffino, the term "octave" as applied to the DWT is just referring to the dyadic scales. So you take all the coefficients at that scale. For example:
x = randn(1024,1);
[C,L] = wavedec(x,3,'db4');
d3 = detcoef(C,L,3);
d3 is the vector of coefficients at scale 3 (3rd octave). I think octave is a bit outdated now in the wavelet literature, better to refer to them as just scales.
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maryam mosaffa
on 14 Jan 2018
How can i know the best wavelet mother i chose for my case study.please introduce me the best way of choosing wavelet mother in CWT toolbox?
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