SSIM	Structural Similarity Index Measure
SI	Similarity Index
KNN	k-NearestNeighbor
SLIC	Simple Linear Iterative Cluster
SNIC	Simple Non-Iterative Clustering
LBP	Local binary pattern
BR	Boundary Recall
USE	Under-Segmentation Error
ASA	Achievable Segmentation Accuracy
SEG	the result of automatic algorithm Segmentation
GT	Ground Truth
CT	Computed Tomography
CCR	Correct Classification Ration