Two-dimensional Fourier transformation utility

버전 1.0.2 (56.8 KB) 작성자: Masayuki Tanaka
It provides some utility functions for the two-dimensional Fourier transform.
0.0
(0)
다운로드 수: 13
업데이트 날짜: 2023/4/29

라이선스 보기

It provides some utility functions for the two-dimensional Fourier transform.
run demo_fourier2.m
Textbooks usually show the Fourier spectrum which the DC component is located at the center of the graph. However, matlab function of fft2 provides the Fourier transform whose DC component is top-left. It is not convenient for us. Then, it provides simple warp function to generate a texbook like Fourier spectrum.
Fourier transform implicitly assumes an input image is cyclic.
This implicit assumption produces an artifact in the Fourier domain because the border of an image usually has strong edges.
In order to reduce this artifact, the window is usually applied to the image before the Fourier transformation.
But, if we want to operate in the Fourier domain, the window is not suitable. Then, it also provides the padding function for the Fourier transform.
demo_fourier2 : sample program
fourier2, ifourier2 : wrap functions of fft2 and ifft2
FourierSpectrum2: warp function to estimate Fourier spectrum
fbourder2, ifboruder2: padding functions for Fourier transform
fblackman2: window function
demo_fourier2 : sample program
fourier2, ifourier2 : wrap functions of fft2 and ifft2
FourierSpectrum2: warp function to estimate Fourier spectrum
fbourder2, ifboruder2: padding functions for Fourier transform
fblackman2: window function

인용 양식

Masayuki Tanaka (2024). Two-dimensional Fourier transformation utility (https://www.mathworks.com/matlabcentral/fileexchange/128754-two-dimensional-fourier-transformation-utility), MATLAB Central File Exchange. 검색됨 .

MATLAB 릴리스 호환 정보
개발 환경: R2023a
모든 릴리스와 호환
플랫폼 호환성
Windows macOS Linux

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

20230429

버전 게시됨 릴리스 정보
1.0.2

Updated description
1.0.1

Updated description
1.0.0