how to correct this error?

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prabhu singh
prabhu singh 2023-1-15
评论： Image Analyst 2023-1-15
Ran in:
L=90;
M=90;
T=csvread('read.csv');
f=abs(fftshift(fft2(T)));
a=-L/2*0.12:0.12:0.12*L/2;
b=-M/2*0.20:0.20:0.20*M/2;
t=(a.^2-b.^2)/(2.*a);
f_t=20*log10(f);
figure
imagesc(t,b,f_t)
grid on
axis equal
title('after shift')
axis tight
colormap (hot);
figure
imagesc(a,b,f_t)
grid on
axis equal
axis tight
title('before shift')
colormap (hot);
if my data is shifted wrt t then the place from where the data is shifted towards the positive axis that place should be white blocks
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prabhu singh
prabhu singh 2023-1-15
but with other data why i am not able to see white box..bcoz other data is also shifted at the same time
Image Analyst
Image Analyst 2023-1-15
I don't know. You didn't post/attach the other data.

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