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Tracking Line in an Image

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yjin
yjin on 9 Dec 2022
Commented: yjin on 11 Dec 2022
I have a 2D matrix/image that looks like the attached image when plotted using the "imagesc" function. The x-axis is time, y-axis is position, and brightness indicates signal strength.
I would like to trace a 1D signal from this image that indicates the flow of the signal, aka, the movement of the signal position with respect to time. Specifically, the output is a 1D array of 170 elements with values ranging from 0 to 1500.
Would anyone know a method or a MATLAB function that would help in this problem? Thanks a lot! Please let me know if the question is not clear.

Accepted Answer

Image Analyst
Image Analyst on 10 Dec 2022
I'd probably use cross correlation of each column with the next column to determine how much the column has shifted vertically. Keep track of the number of rows it shifts for each column.
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yjin
yjin on 11 Dec 2022
This works pretty well. Thank you very much!

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