Track mode (basics)
- Create new annotations for a sequence of frames.
- Add/modify/delete objects for existing annotations.
- Edit tracks, merge several rectangles into one track.
Like in the
Shape mode, you need to select a
Rectangleon the sidebar, in the appearing form, select the desired
Creating a track for an object (look at the selected car as an example):
Track modeby clicking on
Track modethe rectangle will be automatically interpolated on the next frames.
The cyclist starts moving on frame #2270. Let’s mark the frame as a key frame. You can press
Kfor that or click the
starbutton (see the screenshot below).
If the object starts to change its position, you need to modify the rectangle where it happens. It isn’t necessary to change the rectangle on each frame, simply update several keyframes and the frames between them will be interpolated automatically.
Let’s jump 30 frames forward and adjust the boundaries of the object. See an example below:
After that the rectangle of the object will be changed automatically on frames 2270 to 2300:
When the annotated object disappears or becomes too small, you need to finish the track. You have to choose
Outside Property, shortcut
If the object isn’t visible on a couple of frames and then appears again, you can use the
Mergefeature to merge several individual tracks into one.
Create tracks for moments when the cyclist is visible:
Mergebutton or press key
Mand click on any rectangle of the first track and on any rectangle of the second track and so on:
Mergebutton or press
Mto apply changes.
The final annotated sequence of frames in
Interpolationmode can look like the clip below:
Read more in the section track mode (advanced).