Detected ring positions. Line 7: getSelectionCoordinates with straight line ROI stores two arrays, each for start/end x coordinates and start/end y coordinates. Two arrays, in this case xpoints and ypoints, have length of 2. Lines 8 and 9: Resampling of straight line ROI by number of points in the line profile array pA. Lines 10 and 11: Prepare two new arrays to store x and y coordinates of minima positions. Line 12: For-loop to go through minima indices array. Lines 13 and 14: minsA[i] is the index for a single minimum, and using this index, x and y coordinates of that minimum position are retrieved and stored into new arrays prepared in lines 10 and 11. Line 16: After the looping, x and y coordinates of minima are used in makeSelection function to create multiple point ROI.
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