Bilateral Image Subtraction and Multivariate Models for the Automated Triaging of Screening Mammograms

Table 4

Category	Feature		Definition
Shape	1	Area
		Perimeter
	2	Compactness
	3	Elongation
	4, 5	Region centroid ()
	6, 7, 8	Region scatter ()
Signal	9	Mean
	10	Median of the Signal	Median =
	11	Energy
	12	Variance
	13	Standard deviation
	14	Dynamic range
	15	mean
	16	Entropy
	17	Skewness
	18	Kurtosis
	19	Range
	20, 21	fraction greater than deviations ()
	22, 23	fraction lower than deviations ()
	24–33	Value at fraction ()
	34	5% Trimmed Mean
	35	5% Trimmed Standard deviation
	36	5% Trimmed Mean
Morphology	37	Total Signal
	38, 39	Signal centroid ()
	40, 41, 42	Signal scatter ()
	43	Signal Surface