Image processing (2D FFT)

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Vincent Sin
Vincent Sin 2018-12-15
评论： Image Analyst 2018-12-16
okay so here is the problem i have and i cant find a proper solution to.
We have a school project to do and we decided that we would do it in Matlab
the problem is: We should do a 2D fft of photo, then we have to use only 1/3 of values to draw the picture and we should draw a original photo and next to it the approximation of that photo using fourier basis
I have never done anything like this, we played a bit with fourier transform in school but my knowledge is not enough to solve this type of problem
and our teacher is like if we ask something most likely she would say that we should use internet to find the solution so here i am trying my luck :D
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Vincent Sin
Vincent Sin 2018-12-16
2/3 of the FT image
Image Analyst
Image Analyst 2018-12-16
Easy. Use fft2() then use indexing to erase bands of the image like
ftImage = fftshift(fft2(grayImage));
ftImage(row1:row2, :) = 0;
Set all four border bands to zero then call fftshift() again followed by ifft2(). Show your work below.

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