Fig. 7. Empirically measured lens-induced measurement distortion.
a Illustration of scale standards placed at different heights on pins. b View of the image taken by the imaging system. c, d Frequency distribution c and spatial distribution d of size anomalies in absolute percentage compared to a 4 cm butterfly. e, f The raw value for d & e is provided. The dashed line in c & e indicates median and zero, respectively. The region bounded by the red dashed line in d, f are where we place our specimens for imaging.
