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Short articles about our work and passion projects

Camera Tracking: Chapter 2 - Accuracy

Welcome to our second chapter, where we will discuss our experiences with camera-match-accuracy and the placement of tracking points.

By Teun Ruijssenaars (Creative Director) and Kris Treiber (3d Artist)

Check out our new video (and the ‘Making Of Video) below :

Making Of:

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:

  1. 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).

  2. 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:

ConfRoom_00140.jpg

This heat map shows degrading accuracy in camera tracking outside the tracking point area:

ConfRoom_00148accuracy.jpg

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:

BetterTracking.jpg

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):

Thank you for reading!

Teun Ruijssenaars / Kris Treiber