Originally Posted by

**arith**
I was going to let this go sort of embarrased you know; don't want to look too stupid. But I'm not and I know I'm going to regret it. So firstly , what is frequency in an image?

What is a frequency domain? Fourier transform is that really important or just a function that will do. I mean Fourier transform is not any more something I'm familiar with. Actually I don't think it ever was but sort of crept in somewhere.

I am very grateful for your answer Rick, I can of course find the answers now just from what you have said. Thank you