FFT to calculate the amplitude and phase image

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chaima kadess
chaima kadess el 19 de Sept. de 2018
Comentada: chaima kadess el 19 de Sept. de 2018
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
KALYAN ACHARJYA el 19 de Sept. de 2018
What do you mean by amplitude and phase of an image?
Amplitude means Intensity, Please confirm?
chaima kadess
chaima kadess el 19 de Sept. de 2018
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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