During 2D tracking, I focused on finger movement. I should change the greenscreen and scroll the display even more because the action of the hand initiates a smoother and faster transition. I also designed the screen for the iPhone, photobashing various elements and images in Photoshop.
Workshop notes:
Transform is a super useful node that deals with translation, rotation, and scale as well as tracking, warping, and motion blur.
Animation>Set keys in Transform node.
2D Tracker:
This is a 2D tracker that allows you to extract animation data from the position, rotation, and size of an image. Using expressions, you can apply the data directly to transform and match-move another element. Or you can invert the values of the data and apply them to the original element – again through expressions – to stabilize the image.
This is the general process for tracking an image:
- Connect a Tracker node to the image you want to track.
- Use auto-tracking for simple tracks or place tracking anchors on features at keyframes in the image.
- Calculate the tracking data.
- Choose the tracking operation you want to perform: stabilize, match-move, etc.
Pre-tracking treating:
Sometimes we should treat the original plate to obtain better tracks. We usually at least denoise the plate before tracking.
- Denoise plate (denoise node – median node).
- Increase contrast with grade node.
- Lapalachian node can help in certain case to lock better tracks.
It is a good idea to denoise footage to improve track.
Stabilise footage:
It is essential to denoise your plate before tracking. After this: call denoise node; select area of sample noise across the image; make sure to select an area with even colors (possibly mid greys); control amount of denoise and smoothness; write out the denoise plate and read it back in.