Global thresholding

Multi-step level-set

Threshold

Threshold

Classification

max: 2.2

mean: 0.2

RMS: 0.3

max: 3.6

mean: 0.16

RMS: 0.1

max: 3.8

mean: 0.2

RMS: 0.2

max: 5.2

mean: 0.4

RMS: 0.8

max: 3.2

mean: 0.16

RMS: 0.4

Snake initialisation techniques