Creating mattes and clean plates is a tedious
process. However, mattes and clean plates are essential
elements in digital compositing, especially for producing
a photo- realistic composite. Rotoscoping[8] is one of
main tasks in digital compositing, which will directly
determine the success of the final result. Rotoscoping in
this project started from frame 130 and finished at 185
frames for most objects in the scene, it had to be
repeatedly done for every object, which overlapped with
the target frame by frame. Because the position of the
target is in a medium shot, it therefore required highly
accurate mattes, otherwise the final composite would
reveal some edges of the original background around the
mattes. Figure 4 Shows a pair of finished mattes