Table 1:

Difference between segmentation thresholds for feature-defined and density-defined composite boundaries comprised of ON- and OFF-center DOG functions (Fig. 2b). Median differences and 95% confidence intervals of the difference were computed from $\mathrm{N}=1000$ bootstraps.

Observer	Median diff.	95% CI
CJD	0.0581	[0.0195, 0.1817]
CJM	0.0981	[0.0631, 0.1291]
RAR	0.1742	[0.1206, 0.2292]