Posted by
Widodo D. Putro on
Jul 08, 2010; 10:14am
URL: http://imagej.273.s1.nabble.com/Signal-to-Noise-Ratio-SNR-tp3687681p3687684.html
Well Gea & Marten, I'm measuring the repetition of texture spatial frequencies..
I try to measure object's coarseness by first extracting the entropy from its
FFT.
Yes, I'll write the macro. Thanks for the info
--
Widodo D. Putro
Institute of Technology Bandung
Jl. Ganesha 10, Bandung, Indonesia
________________________________
From: Gea O.F. Parikesit <
[hidden email]>
To:
[hidden email]
Sent: Wed, July 7, 2010 11:01:18 AM
Subject: Re: Entropy measurement
I am not aware of any existing plugin that measures entropy directly from FFT,
but you could easily write a macro for this. That being said, I wonder why would
you need the FFT, rather than the grey-values itself? Are you interested in
certain spatial frequencies in your images?
Best regards,
Gea Parikesit
Gadjah Mada University
http://gea.ari.googlepages.com/microfluidicsugm--- On Tue, 6/7/10, Widodo D. Putro <
[hidden email]> wrote:
From: Widodo D. Putro <
[hidden email]>
Subject: Entropy measurement
To:
[hidden email]
Received: Tuesday, 6 July, 2010, 10:53 PM
Dear ImageJ users,
I wonder is there any ImageJ plugin to measure the entropy coefficient derived
from FFT of a stack of images?
I've used the Texture Analyzer plugin by Mr. Cabrera, but it defined the entropy
from gray level co-occurence matrix not from FFT.
Thank you,
Regards.
--
Widodo D. Putro
Institute of Technology Bandung
Jl. Ganesha 10, Bandung, Indonesia