Through image = imread (image.tiff), then Y = fftshift applied (fft2 (image)).
Viewed the spectrum through imshow (log (abs (A )),[]) as also by imshow (A, [0 100000]).

The result of the spectrum has four points in the corners. Would anyone interpret this spectrum?

Follow the link and the image obtained by FFT.

https://plus.google.com/u/0/photos/114934434917061582852/albums/5665646538614353345/5665646540211763538#photos/114934434917061582852/albums/5665646538614353345/5665646540211763538

ROBERLIO DE O. MELO"Tudo tem o seu tempo determinado, e htempo para todo o propito debaixo do c." Ecls.3,1 Start a New Thread