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To be a high-error tracker, a tracker must meet either of two criteria:
the percentage of a tracker’s lifespan that consists of bad frames must be over a threshold, or
the average hpix RMS error over the lifespan of the tracker, as appears for the tracker on the Coordinate panel, must be over a threshold.
The percentage threshold appears to the right of the high-error trackers line as usual. The hpix error threshold appears underneath it, to the right of the Unsolved/Behind category, an otherwise empty space because that category requires no thresholds.
As an example of the first criterion, consider a tracker that is visible for 20 frames. However, 8 of those frames are “bad frames” as defined for that category. The percentage of bad frames is 8 out of 20, or 40%, and at the standard threshold of 30% the tracker would be considered high-error and eligible for deletion. Typically such trackers have switched to an adjacent nearby feature for a substantial portion of their lifespan.
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