Fig. 2
From: A comparison of point-tracking algorithms in ultrasound videos from the upper limb
Error accumulation in frame-to-frame trackers. a Error in frame-to-frame trackers. The average error accumulation rate for the CSRT tracker, for example, is 0.0115 pixels/frame, or 0.88 μm/frame. b Error comparison across movements—walk, reach, maximum voluntary contraction (MVC), and rest (see “Video collection” for description). The error bars here show standard error of the mean (SEM)