Background: I'm trying to make a system that tracks a number of bubbles in a videoI'm implementing the bubble detection in the single image case using the Circular Hough Transform.  Due to occlusion, blur and other factors, this detection will never be 100% accurate.  I am tuning the detection procedure for high recall, possibly at the expense of precision.Once this is done and applied to a sequence of frames from a video, I will have a number of detections that can be characterised as points in 4D space - x-position, y-position, radius and frame index.Is there a procedure that can recover curves from this 4D point cloud?
Recover curves from noisy collection of points
regression;pattern recognition;computer vision;hough