Camera Tracking: Chapter 2 - Accuracy
Camera Matching starts with setting up good tracking points (actual stickers with a dot, that you can use to re-track a camera movement). We learned a few valuable lessons:
Tracking without tracking points is possible. But, it won’t be very accurate, and will require a ton of manual clean up (we tried and abandoned the attempts).
Tracking will be more accurate when the tracked area covers a larger part of the footage. As you can see: our radio is small, compared to the table.
Because we only applied tracking points on a small piece of paper, the accuracy of the camera match deteriorates outside of the area with tracking points. In our previous article (Camera Tracking - Chapter 1), we covered a much larger area. This resulted in a more accurate camera match.
How our tracking points were set up:
This heat map shows degrading accuracy in camera tracking outside the tracking point area:
Ideally, we would have set up many more tracking points. The downside: we would have to clean those out of the footage later on.
More ideal tracking points:
Experiments with objects larger than the tracking area, came out much less accurate. See the video below for a side by side comparison (we even spent time fixing the inaccuracies on the larger box):