For the 4th week our coursework consisted on rotoscoping about 60-80 frames worth of an organic movement in the shot. Here are the original, green matte and with gray background rotoscoped shots.
I included the shapes around baby hairs so that I could apply the luma key node later during the course in order to isolate the dark hairs against the contrast of lighter wall. Following from the comment by a tutor, I worked on adding feathering to my roto shapes such that they would not look as sharp as before.
The toughest part of the shot were the movements of the shirt material with all the folds in various places. I found the arms to be easiest as I had a better understanding of how to divide the shapes between various places, after I had some practice with head and the body.
For my second rotoscope, I used the footage taken earlier in week 2, where I rotoscoped out the running girl at the last frames of the shot, i.e. when she is passing by the camera. I found getting the correct feathering for the coat the hardest. Another difficulty was drawing roto for the cap as it would occasionally be against the white background and it would be hard to see the outline.
Here are the roto shapes I used to cut her out.