Re: [Imlab-users] frequency spectrum of an image

[Antonio S. <sc...@te...>]

 Hi Shah,

 

  To inspect the frequency distribution of an image, the best tool I know is
the Fourier Transform.

 

  You can use the "Process/Domain Transfom/Forward Fourier" menu to see the
frequency distribution.

 

Best Regards,

Antonio Scuri

 

From: Shah Khalid [mailto:cs....@gm...] 
Sent: segunda-feira, 1 de agosto de 2011 09:36
To: iml...@li...
Subject: [Imlab-users] frequency spectrum of an image

 

Dear all,

I use high-pass (LoG) and low-pass (Guassian) filtering function of imlab.
Thanks for the nice software.

I need to draw the frequency distribution plots of the images before and
after filtering, to show
which frequency bands were present before and after filtering.

Can you please help me in this issue?

I played around the "Find and show histogram view", but I'm not quite sure
it is the right function
as the ouput on x and y coordinates are not labeled. And I doubt that it is
simply the histogram count
of the number of pixels having specific intensity?

Thank you very much in advance for your help and quick reply.

Best regards,
Shah.