I am trying to find the pixel vales by using DAS algorithm, I have calculated the envelope of the signals by using Hilbert transform and then calculated the arrival time of a signal traveling from the actuator to the arbitrary pixel value (x,y) and then to the sensor, they actually form multiple ellipse but I cant figure out the next step to obtain the image value, E(x, y). The general formula of DAS is attached. Someone please help me.
I don't know your problem exactly, but i can guide you how to implement this in Matlab or some other software. Follow the steps in software coding:
1. First what is i,j. Fix it. What is u and v?
2. Find t(x,y) value using the given formula.
3. Second step evaluate u and v.
4. Third step find rij.
5. Its not simple. You should interrupt like this
rij(t(x,y)) =
6. Then find E(x,y)
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