A = imread('fig1c.jpg');
Green = A(:,:,2);
s = size(Green);
FF = zeros(s);
for i=1:s(1)
    FF(i,:) = fft(Green(i,:));
end
unit = 50000/1086;
y = 0:unit/1000:unit*(s(1)-1)/1000;
x = 0:1/unit:1/unit*(s(2)-1);
surf(x,y,abs((FF)));
axis([0.15 0.62 0 2]);
view(0,90);
shading flat;
colorbar;
caxis([0 5000]);