FFT to calculate the amplitude and phase image

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chaima kadess 2018-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/419784-fft-to-calculate-the-amplitude-and-phase-image

评论： chaima kadess 2018-9-19

hi, the goal of my project for my master degree is to build the amplitude and phase image from a series of scintigraphic images that represents a cardiac cycle. to achieve this, I must obtain for each pixel the intensity variation curve over time and apply the FFT to extract the amplitude and the phase of the first harmonic of my spectrum, I must repeat this for all the pixels of the image to finally build from all phases and amplitudes computed a phase image and an amplitude image. it's my first time working with FFT ,can someone help me please with a document to start with or any think can helps to achieve my goal?

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KALYAN ACHARJYA 2018-9-19

What do you mean by amplitude and phase of an image?

Amplitude means Intensity, Please confirm?

chaima kadess 2018-9-19

thanx for responding, I_cos (i,j)= ∑ cos[(2π/T)(k-1)]× val(i,j,k) I_sin (i,j)= ∑ sin[(2π/T)(k-1)]× val(i,j,k) where val(i,j,k)is the (i,j)pixel value of the kth image , T=16 is the total number of the sequence images. amplitude image : I_amp= sqrt((I_cos(i,j))^2+(I_sin(i,j))^2 ) phase image : I_phase=arctan((I_sin(i,j))/(I_cos(i,j) )) hopefully you did understand me.

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