2d fft by imagemagick
convert image.png -fft +depth +adjoin fft_image_%d.png brew reinstall imagemagick --with-fftw 
Ubuntu 미세먼지 팁들
sudo apt-get install lsb-release scrot wget http://github.com/downloads/djmelik/archey/archey-0.2.8.deb sudo dpkg -i archey-0.2.8.deb archey install
펄스가 작아서 잘 안보인다.
답글삭제convert lena.png -fft -ift image.png
답글삭제http://www.imagemagick.org/Usage/fourier/#fft_spectrum
답글삭제convert fft_image_0.png -auto-level -evaluate log 10000 lena_spectrum.png
답글삭제스펙트럼 이미지 오토레벨 보정하기