# How to Apply PSF to obtain the difference between two method?

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Amjad Iqbal on 1 Oct 2022
Commented: Image Analyst on 2 Oct 2022
Dear MATLAB Experts,
I have output of two methods, qualitatively both perform near similar, however to represent difference I would like to present their difference after performing PSF.
I have attached a result from a paper they use PSF for two methods and then subtaction to show the quantitative difference.
I have attached .mat files with output of two methods having x, y vectors, Amplitude (Image).
Could you please guide me how can I obtain results of psf like given in attach figure and then simply differecne to show quantitative performance.
Thank you!
Method1 = Method_VH;
Method2 = Method_VV;
x_vect = (-5:0.08:5);
y_vect = (-5:0.08:5);
subplot(121)
imagesc(x_vect, y_vect,20*log10(abs(Method1)/max(max(abs(Method1)))),[-35 0]),...
axis('tight'),axis('square'),xlabel('X/m'), ylabel('Y/m'),title('Method1'),set(gca,'FontSize',16),...
b = colorbar;colormap jet;
ylabel(b,'Amplitude[dB]','FontSize',16);
subplot(122)
imagesc(x_vect, y_vect,20*log10(abs(Method2)/max(max(abs(Method2)))),[-35 0]),...
axis('tight'),axis('square'),xlabel('X/m'), ylabel('Y/m'),title('Method2'),set(gca,'FontSize',16),...
b = colorbar; colormap jet;
ylabel(b,'Amplitude [dB]','FontSize',16);

Image Analyst on 1 Oct 2022
Use surf and either imshow or image or imagesc.
##### 2 CommentsShowHide 1 older comment
Image Analyst on 2 Oct 2022
I don't know what preprocessing they did. Below I display the magnitude. And it looks like the resolution of what you attached is far, far less than the data they used.
vh = abs(s.Method_VH);
subplot(2, 1, 1);
imshow(vh, [], 'InitialMagnification', 1000)
colormap("turbo")
colorbar
subplot(2, 1, 2);
surf(vh, 'EdgeColor','none')

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