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

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Amjad Iqbal 2022-10-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1815570-how-to-apply-psf-to-obtain-the-difference-between-two-method

评论： Image Analyst 2022-10-2

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!

load('Method_VV.mat'); % method-1

load('Method_VH.mat'); % method-2

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);

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Answer 1

Image Analyst 2022-10-1

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https://ww2.mathworks.cn/matlabcentral/answers/1815570-how-to-apply-psf-to-obtain-the-difference-between-two-method#answer_1064670

Use surf and either imshow or image or imagesc.

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Amjad Iqbal 2022-10-2

@Image Analyst

I guess before using surf it needs some processing, I tried all these you mentoined.

In the attached image they use x, y vectors and amplitude, which I do have also, however for psf they use some necessary processing.

PSF is mostly used in image processing, if you may recommend somthing that I may produce meaningful output to express the result. thank you!

Image Analyst 2022-10-2

在 MATLAB Online 中打开

Method_VH.mat

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.

s = load('Method_VH.mat')
vh = abs(s.Method_VH);
subplot(2, 1, 1);
imshow(vh, [], 'InitialMagnification', 1000)
colormap("turbo")
colorbar
subplot(2, 1, 2);
surf(vh, 'EdgeColor','none')