Fourier filters
Posted by
Sandro de Luelmo on
Apr 19, 2007; 10:27am
URL: http://imagej.273.s1.nabble.com/Fourier-filters-tp3699723.html
Hi my name is Sandro de Luelmo and Im working as a teacher and we are trying to use ImageJ as a pedagogical tool for our students. Its a course in image processing and we want them to understand the Fourier transform and how filtering in the frequency domain working in detail.
An exercise that I would like to include could be as follows:
The student should perform a FFT on a image. Save that FFT-image in there portfolio for later presentation. Open a high-pass filter and save the image of the filter for later presentation. Multiply the FFT-image with the high-pass filter and save the result-image for later presentation. Perform a INVFFT on the result-image and thereby obtain a edge enhanced image compared to the original image.
Ive tried everything in ImagJ but it is for example impossible to multiply a FFT-image with a FFT-filter and then inversing it! Is there anyone that knows if it is possible to achieve the goals I have for this course? Maybe I could use some plugins or macros for this task??
Best regards
Sandro de Luelmo
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