Código matlab: filt=ceros(160,160); filtro(1:20,1:20)=1; filt(fin-19:fin,1:20)=1; filtro (1:20, final-19: final) = 1; filt(fin-19:fin,fin-19:fin)=1; x160_f(:,:,1)=ifft2(fft2(doble(x160(:,:,1))).*filtro); x160_f(:,:,2)=ifft2(fft2(doble(x160(:,:,2))).*filtro); x160_f(:,:,3)=ifft2(fft2(doble(x160(:,:,3))).*filtro);