what is the meaning of bandwidth in octav?

2011 11 23
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what is the meaning of bandwidth in octav?

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Walter Roberson
Walter Roberson 2011-11-23
Are you referring to octaves as a measurement, or are you referring to the software product "octave" ?
hind
hind 2011-11-24
I think octave as a measurement, I want to know how could I represent it in my code,
actually you may see my question so trivial but I didn't know anything about this.
Jan
Jan 2011-11-24
@hind: No, your question is not trivial. It contains not enough details to be answered easily - or at all.
hind
hind 2011-11-24
actually I want to write code of circular gabor filter in matlab and there is relations between (gaussian sigma σ) and (central frequency of gabor fc) is described as
σ.fc= (1/pi).sqrt(ln2/2).((2^ΔF+1)/(2^ΔF-1))
where ΔF (∈[0.5, 2.5]) denotes the bandwidth in octave. and σ with five-pixel width
Idon't know how to represent this correctly

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hind
hind 2011-11-24

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this my code is it rghit?
sigma = 5;
fc= (1/pi*sigma)*sqrt(log(2)/2)*(((2^1.12)+1)/((2^1.12)-1));
for x = -fix(sigma):fix(sigma)
for y = -fix(sigma):fix(sigma)
G(fix(sigma)+x+1,fix(sigma)+y+1) = (exp(-.5*((x/sigma)^2+(y/sigma)^2)))* cos(2*pi*fc*(sqrt((x)^2+(y)^2)));
end
end

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hind
hind
2011-11-23

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