Extended Data Fig. 2: Comparison between velocity field obtained from tracking (PTV) and particle image velocimetry (PIV).
From: Evidence of universal conformal invariance in living biological matter

Shown here are the covariant plots for (a) WT bacteria and (b) MDCK monolayer. The datapoints would fall along a line with a slope of 1 (dashed black line) if these two measurements had precisely the same value.