Semi-Automatic Integrated Segmentation Approaches and Contour Extraction Applied to Computed Tomography Scan Images

Table 3

Internal constraints for shape detection level sets.

Shape detection
Initial distance	3≤ initial distance ≤9
Sigma	0.45≤𝜎≤1.1
Alpha	−0.25 ≥𝛼≥−0.55
Beta	1.85 ≤𝛽≤3.25
Propagation scaling	0.005 ≤ propagation ≤ 0.07
Curvature scaling	0.9 ≤ curvature ≤ 1.5