A New GLLD Operator for Mass Detection in Digital Mammograms

Table 2

Previously developed approaches on mass detection based on template matching. In this table, the ratio which indicates the number of real masses/number of normal ROIs.

Template-matching based
Author	Year	Gray level	Shape	Entropy	Similarity	Ratios	Results
Chang et al. [12]	2001		√	√	Likelihood function	300/300	𝐴𝑧 = 0.83
Tourassi et al. [13]	2007	√		√	Mutual function	901/919	𝐴𝑧 = 0.81