An Improved Fuzzy Connectedness Method for Automatic Three-Dimensional Liver Vessel Segmentation in CT Images

Algorithm 2

Improved fuzzy connectedness.

	Input: the vesselness image Ivesselness
	Output: the liver vessel segmentation
(1)	Initialize the parameters, and set threshold
(2)	Perform two-threshold Otsu to Ivesselness to obtain the parameters m and s
(3)	Calculate the fuzzy affinity by using Equation (9)
(4)	Calculate adaptively the weights and by using Equation (10)
(5)	Compute potential seeds in regions, and select automatically the single seed with the largest vesselness mean in its region
(6)	Binarize the fuzzy scene and perform anisotropic resampling to obtain the final liver vessel segmentation