Не могу понять ошибку кода

%2D FFT Demo
 
 %Import images 
imageA = imread('greekchurch','jpg');
imageB = imread('aishwarya','jpg');
 
 %Display images 
figure, imshow(imageA)
title('Image A - Greek Church')
figure, imshow(imageB)
title('Image B - Aishwarya Rai')
 
 %Perform 2D FFTs 
fftA = fft2(double(imageA));
fftB = fft2(double(imageB));
 
 %Display magnitude and phase of 2D FFTs
figure, imshow(abs(fftshift(fftA)),[24 100000]), colormap gray
title('Image A FFT2 Magnitude')
figure, imshow(angle(fftshift(fftA)),[-pi pi]), colormap gray
title('Image A FFT2 Phase')
figure, imshow(abs(fftshift(fftB)),[24 100000]), colormap gray
title('Image B FFT2 Magnitude')
figure, imshow(angle(fftshift(fftB)),[-pi pi]), colormap gray
title('Image B FFT2 Phase')
 
 %Switch magnitude and phase of 2D FFTs 
fftC = abs(fftA).*exp(i*angle(fftB));
fftD = abs(fftB).*exp(i*angle(fftA));
 
 %Perform inverse 2D FFTs on switched images 
imageC = ifft2(fftC);
imageD = ifft2(fftD);
 
 %Calculate limits for plotting 
cmin = min(min(abs(imageC)));
cmax = max(max(abs(imageC)));
 
dmin = min(min(abs(imageD)));
dmax = max(max(abs(imageD)));
 
 %Display switched images 
figure, imshow(abs(imageC), [cmin cmax]), colormap gray
title('Image C  Magnitude')
figure, imshow(abs(imageD), [dmin dmax]), colormap gray
title('Image D  Magnitude')
 
 %Save images 
saveas(1,'imageA.png')
saveas(2,'imageB.png')
saveas(3,'imageAfftmag.png')
saveas(4,'imageAfftpha.png')
saveas(5,'imageBfftmag.png')
saveas(6,'imageBfftpha.png')
saveas(7,'imageC.png')
saveas(8,'imageD.png')
 
figure, imshow(abs(fftshift(fftA)),[24 100000]), colormap gray

title('Image A FFT2 Magnitude','Color','b')