why ripples are forming after IFFT(theoretical explanation needed)?
조회 수: 2 (최근 30일)
이전 댓글 표시
I have an intensity image. I want to know how these ripples are formed after IFFT theoretically? And how it is dependent on orientation from the origin and widths?
채택된 답변
Image Analyst
2020년 11월 22일
The ripples could be formed if you did a low pass filter. It's the high frequencies that help form flat regions, steps, edges, sharp ridges, etc. -- they keep the surfaces flat and straight. If you remove those with a low pass filter, all you'll be left with are the low frequencies with no high frequencies to keep the surfaces and profiles straight and flat.
댓글 수: 4
Image Analyst
2020년 11월 22일
Well of course the image would look different. And so would the fft, especially the phase image.
추가 답변 (0개)
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!