Table 2.

Unsigned border position differences of different esophageal OCT image segmentation algorithms.

Boundaries	SBGS	SVM-GS	RF-GS	GTDP
${\mathrm{B}}_1$ ($\mu m$)	$2.46\pm 0.88$	$2.48\pm 0.91$	$\mathbf{2.44}\pm \mathbf{0.73}$	$2.47\pm 0.93$
${\mathrm{B}}_2$ ($\mu m$)	$2.07\pm 1.66$	$3.72\pm 2.02$	$\mathbf{1.91}\pm \mathbf{1.53}$	$4.58\pm 2.32$
${\mathrm{B}}_3$ ($\mu m$)	$\mathbf{0.22}\pm \mathbf{0.80}$	$1.21\pm 1.33$	$0.31\pm 1.09$	$1.92\pm 1.89$
${\mathrm{B}}_4$ ($\mu m$)	$\mathbf{0.66}\pm \mathbf{0.97}$	$1.87\pm 1.67$	$1.10\pm 1.12$	$2.11\pm 2.08$
${\mathrm{B}}_5$ ($\mu m$)	$3.44\pm 2.23$	$4.11\pm 3.28$	$\mathbf{3.22}\pm \mathbf{2.34}$	$5.03\pm 4.06$
${\mathrm{B}}_6$ ($\mu m$)	$\mathbf{1.31}\pm \mathbf{1.08}$	$2.20\pm 1.84$	$2.05\pm 1.69$	$2.51\pm 2.10$