Why DFT is used in image processing?

Related questions

1. What is DFT for painting?
2. What Dtft means?
3. What is difference between FFT and DFT?
4. How do I measure paint thickness?
5. What is FFT size?
6. Is DFT and Dtft same?
7. What is DFT used for?
8. What is zero padding What are its uses in DSP?
9. What is difference between DFT and DCT?
10. What is Twiddle Matrix?

Tags

1. #input
2. #processing
3. #cosine
4. #which
5. #frequency
6. #while
7. #output
8. #important
9. #transform
10. #decompose
11. #transformation
12. #components
13. #represents
14. #spatial
15. #image
16. #equivalent
17. #fourier
18. #domain