![]() (Note: You need to have the FFT image window selected when you try to do the inverse FFT. If you overdo it, you will get banding around the edges and borders. Make the black points big enough but not too big (play around with it). Use the paintbrush to eliminate the other stars. Now, don't remove the center point as that is the "DC" value. This is the pattern to recognize when you open the image again, and do FFT on the whole thing: Then select the part that's only white with texture. The parts you need are:įirst, load your image. ![]() When you open the program it is a strip of menu. I will explain how to find the correct filter, that you can basically do manually in ImageJ (freeware java app). The textbook method is, as others mentioned, to suppress the texture in frequency space.
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