Graylevel Histogram

Standard deviation

STD

[7, 22, 24–26]

Skewness

Skewness

Kurtosis

Kurtosis

Balance

Balance

Greylevel cooccurrence matrix (GLCM)

GLCM Energy

Energy

[24, 25, 27, 29]

GLCM Entropy

Entropy

GLCM Dissimilarity

Dissimilarity

GLCM Contrast

Contrast

GLCM Homogeneity

Homogeneity

GLCM Correlation

Correlation

GLCM Mean

GLCM Mean

GLCM Variance

GLCM Variance

Neighborhood Graytone Difference Matrix (NGTDM)

NGTDM Coarseness

NGTDM Coarseness

[24, 28, 29]

NGTDM Contrast

NGTDM Contrast

NGTDM Complexity

Complexity

NGTDM Strength

Strength

NGTDM Busyness

Busyness

Edge Frequency Analysis

Mean Gradient

Mean_Gradient

[29]

Fourier Transform Analysis, Power Spectrum

RMS

FT_RMS

[29]

FMP (first moment of power spectrum)

FT_FMP

SMP (second moment of power spectrum)

FT_SMP

FD from power spectrum exponent

FT_FD

Fractal Analysis

Intercept of the plot of the standard deviation of the high frequency image as a function of the size the kernel

CD_Yint

[29–31]

Continuous Dimension (CD), slope and intercept

CD_Slope

HZ_PROJ

HZ_PROJ

FD of the standard deviation

FD_Sigma

FD of image using thresholds from 5%85%

FD_TH_5: FD_TH_85

FD of the surface of thebreast considering the gray value represent the height

FD_CALDWELL

FD, Minkowski method

FD_Minkowski
