
Number  Ten realvalued features 

1  Radius (mean of distances from center to points on the perimeter) 
2  texture (standard deviation of greyscale values) 
3  Perimeter 
4  Area 
5  Smoothness (local variation in radius lengths) 
6  Compactness (/area − 1.0) 
7  Concavity (severity of concave portions of the contour) 
8  Concave points (number of concave portions of the contour) 
9  Symmetry 
10  Fractal dimension (“coastline approximation” − 1) 
