fft and complex number operation for dlarray?
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andyFan
el 15 de Nov. de 2020
Comentada: Aditya Patil
el 16 de Sept. de 2021
Is there any ways to do complex number and fft operations for dlarray?
I'm trying to use auto differentiation to calculate the gradient of a mse loss function.
init_phase = 2*pi*rand(1080,1080)-pi;
phase = dlarray(init_phase,'SS');
in_complex_field = ones(size(phase,1,2)).*exp(1j.*phase);
target_amp = im2double(imread('1,bmp'));
out_complex_field = fft2(ifftshift(in_complex_field));
out_amp = abs(out_complex_field).^2;
mse_val = mse(out_amp, target_amp);
grad = dlgradient(mse_val,phase);
Although I could do basic complex number operations with separable real and imaginary parts,
[real,imag] = polar_to_rect(ones(size(phase,1,2)),phase);
in_complex_field = cat(3,real,imag);
is there any ways that I could do fft2 operation with dlarray?
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Aditya Patil
el 18 de Nov. de 2020
As of now, fft does not support dlarray. This is an known issue, and it might get fixed in any upcoming release.
2 comentarios
Hengfa Lu
el 15 de Sept. de 2021
Hi Aditya, I want to follow up to see if fft supports dlarray now? Thank you.
Aditya Patil
el 16 de Sept. de 2021
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