Amplitude or phase versus frequency

Question

Mohanned Al Gharawi 2018-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/382481-amplitude-or-phase-versus-frequency

评论： Mohanned Al Gharawi 2018-2-15

Hi everybody, I have images which were taken for around one month each ten minutes.My supervisor asked me to plot amplitude or the phase of these images versus the frequency by using the FFT formula? thanks

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Answer 1

Abhishek Ballaney 2018-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/382481-amplitude-or-phase-versus-frequency#answer_305049

https://www.mathworks.in/help/matlab/ref/fft2.html

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Mohanned Al Gharawi 2018-2-15

Hi thank you for your interesting, but that is not what I'm asking. As I said before I have around 4000 IR images for a concrete specimen for one month. The specimen has several defect areas. My supervisor asked to pick up two pixels one at the defect area and the other at sound area for all the images. So if we draw these pixel versus time we have like two signals. Anyhow, he wants to take fft for these two selected pixels versus time and draw the phase and the amplitude versus frequency. Thanks again.

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