[Insight-users] Fwd: Homomorphic filtering Help

[Geoffrey Leveque]

----- Mail transféré -----
De: "Geoffrey Leveque" <geoffrey.leveque at insa-lyon.fr>
À: insight-users-request at itk.org, "Julien Cohen-Adad" <jcohen at polymtl.ca>
Envoyé: Jeudi 15 Août 2013 14:12:47
Objet: Homomorphic filtering Help

Hello everyone,

Due to my medical image processing internship at Polytechnique Montréal for 6 months, I am a new French user of ITK (and C++) and I try for now to develop a simple Homomorphic filter for image non uniformity intensity correction. Considering the Homomorphic.cxx attached file, I basically intend to realize the following steps described here : http://blogs.mathworks.com/steve/2013/06/25/homomorphic-filtering-part-1/. This code displays regularly images and txt files at each level of the pipeline to see all changes. However, I think I have a problem during the iFFT or maybe before, when I multiply the Homomorphic filter matrix H with the FFT of the logarithmic input image. Is there someone to help me because I run out of ideas for now and nobody can really help me in my lab ?

To see the basic results of my Homomorphic filter, I use the simple 50*50 attached image like this :
cmake . 
make
./Homomorphic image_50_50.jpg


Regards,
Geoffrey Levêque
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