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Interpolation is a process to automatically create instance labels by estimating the location that labels should be created in videos and image sequences. Interpolation uses manual labels as reference points and needs to be run separately for each object instance. All labels automatically created using interpolation are assigned a confidence score (α) of 99%.
No data is stored on our servers when using interpolation.

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Ontologies

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Simple Interpolation

The video tutorial below goes through the basics of using interpolation in the Label Editor.
  1. Create instance labels on at least two non-consecutive frames.
The more instance labels are manually added throughout the video, the more accurate the resulting interpolation becomes.
  1. Right-click the instance label and select Interpolate from the context menu.
  2. Interpolation is run between the first and last frames the instance is labeled.

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Keyboard Shortcut

You can use keyboard shortcuts to run interpolation.
  1. Click the instance label.
  2. Use the Shift + I keyboard shortcut to the run interpolation between the first and last frames the instance is labeled.

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Re-Interpolate

Interpolation results can be improved by manually correcting some interpolated labels, and re-running the interpolation. Enable the Interpolation auto adjustments toggle in the Drawing settings section of the Label Editor settings. This ensures that only labels with a confidence score (α) less than 100% are overwritten in successive interpolations, while manual labels (α = 100%) are kept and serve as key frames.
This process can be repeated any number of times.
All labels created using interpolation are always assigned α = 99%.