Obtaining image filter from original and filtered image with FFT
3 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Hi,
I have a grayscale original image, and an image obtained by filtering the original with a certain filter. I need to obtain the image of the filter that has been used.
I tried calculating the fft of the two images I have, then inverse fft for the filter:
filter = ifft2 ( fft2(filteredImg)./fft2(OriginalImg));
This does not work, as it gives me something looking like noise:
What is the problem?
1 comentario
Star Strider
el 19 de Mzo. de 2017
First, don’t use filter as a variable name. It is the name of a MATLAB function that you may need, and then won’t be able to use.
Second, if you use imfilter on your original image with your identified filter, does it return your original filtered image? If it does, your identified filter is correct.
Respuestas (0)
Ver también
Categorías
Más información sobre Frequency Transformations en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!