
No.  Feature  Description  NEN^{1}  Lumen  EN^{2} 

1  Area  Area of selection in square pixels 
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2  Perimeter  The length of the outside boundary of the selection 
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3  Width  Width of the smallest rectangle enclosing the selection 
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4  Height  Height of the smallest rectangle enclosing the selection 
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5  MajorAxis
 Major (primary) axis length of the best fitting ellipse 
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6  MinorAxis
 Minor (secondary) axis length of the best fitting ellipse 
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7  Circularity  4π × (Area/Perimeter^{2}). A value of 1.0 indicates a perfect circle 
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8  Feret’s diameter  The longest distance between any two points along the selection boundary 
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9  AspectRatio  MajorAxis/MinorAxis 
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10  Skewness  The third order moment about the mean 
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11  Roundness  4 × Area/(π × MajorAxis^{2}). The measure of the sharpness of particle’s edge and corners 
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12  Solidity  Area/ConvexArea 
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13  RMSAA  Rootmeansquared atypiaamplitude  
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14  TSAV  Total sum of atypia volatilities for PIPs  
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15  AtypiaRatio  The ratio of atypia region  
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16  #AtypiaRegions  The number of atypia regions for identifying papillary  
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17  CytoplasmLength  The cytoplasm length of epithelial nucleus [32]   
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18  CytoplasmLength_{SD}  The standard deviation of CytoplasmLength   
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