For outlining, my initial reaction is to reach for two things: 1. Kalman filters to track an object in motion within a frame [1] 2. Edge detection on the subf

For outlining, my initial reaction is to reach for two things: 1. Kalman filters to track an object in motion within a frame [1] 2. Edge detection on the subframe you got from (1) [2] Both appear to be available out of the box in OpenCV[3][4], though you'll have to fiddle with parameters I'm sure. [1] Example: https://www.youtube.com/watch?v=K14SK4v3-IY https://www.youtube.com/watch?v=K14SK4v3-IY [2] https://en.wikipedia.org/wiki/Canny_edge_detector https://en.wikipedia.org/wiki/Canny_edge_detector [3] http://docs.opencv.org/trunk/dd/d6a/classcv_1_1KalmanFilter.html http://docs.opencv.org/trunk/dd/d6a/classcv_1_1KalmanFilter.... [4] http://docs.opencv.org/2.4/doc/tutorials/imgproc/imgtrans/canny_detector/canny_detector.html http://docs.opencv.org/2.4/doc/tutorials/imgproc/imgtrans/ca...