Hi everyone!

I have a problem that is associated with Fast Fourier Transform of an image. I've made an application with some filters for an images. It's a program with JLabels for displaying images before and after filtration and JButtons for filters. So, my problem is with FFT for an image, i've seen examples for that transformation, but i really don't know how to use that in my program. I don't know how to start that, please someone help me, i'm in need. I hope someone will answer for that question, thank you and greetings