For this assignment, I will be creating a new area to create a poster trace. This is because it will help me to memorize and better understand the logic behind each node. The process is roughly as follows:

1. Use “planartracker” to roto the approximate location of the first poster and turn on the tracking.

2. Create a “cornerpin2D(relative) in “tracking”

3. input the poster image of your choice, do roto and premult, and add “cornerpin2D” to help the poster to locate in the position of the original video.

4. connect the original scene with the poster replaced.

For the node, I handle them in a similar way to the iPhone cell phone animations, first roto, then turn on tracking afterward, and finally in premult. While processing I found some errors, for example only the first frame has an occlusion relationship, this is because the tracking module is not enabled and the roto needs to be manually adjusted for displacement.