Computer Aided Diagnosis System for Detection of Cancer Cells on Cytological Pleural Effusion Images

Table 5

List of GLRLM features and their associated equations.

Features	Equations
Short run emphasis (SRE)
Long run emphasis (LRE)
Low gray-level run emphasis (LGRE)
High gray-level run emphasis (HGRE)
Short run low gray-level emphasis (SRLGE)
Short run high gray-level emphasis (SRHGE)
Long run Low gray-level emphasis (LRLGE)
Long run high gray-level emphasis (LRHGE)
Gray level nonuniformity (GNU)
Run length nonuniformity (RNU)
Run percentage (RP)

denotes the number of runs of pixels of gray level and the run length , is the number of gray levels in the image, is the number of different run lengths in the image, is the total number of runs, and is the number of pixels in the image.