Table 2 Color and geometrical variables of melanoma patients, as extracted with digital image processing
Variable | Mean (SD) | r coefficient | p value |
|---|---|---|---|
Geometric variables | |||
Area (cm2) | 2.5 (3.7) | 0.72 | 0.000 |
MaxD (cm) | 1.9 (1) | 0.65 | 0.000 |
Perimeter (cm) | 5.5 (2.9) | 0.62 | 0.000 |
Circularity (ratio) | 1.1 (0.07) | − 0.05 | 0.56 |
Rm (cm) | 0.8 (0.4) | 0.65 | 0.000 |
Eccentricity (cm) | 0.03 (0.02) | 0.46 | 0.000 |
Color variables | |||
Mean red | 156 (32) | − 0.17 | 0.04 |
SD red | 33 (11) | 0.11 | 0.19 |
CV red | 23 (11) | 0.14 | 0.09 |
Range red | 191 (35) | 0.15 | 0.06 |
Skewness red | − 0. 3 (0.7) | 0.16 | 0.05 |
Mean green | 97 (24) | − 0.17 | 0.03 |
SD green | 30 (6) | 0.28 | 0.000 |
CV green | 33 (12) | 0.33 | 0.000 |
Range green | 194 (32) | 0.23 | 0.003 |
Skewness green | 0.43 (0.57) | 0.18 | 0.03 |
Mean blue | 93 (25) | − 0.04 | 0.64 |
SD blue | 30 (6) | 0.21 | 0.01 |
CV blue | 35 (12) | 0.18 | 0.02 |
Range blue | 202 (33) | 0.21 | 0.009 |
Skewness blue | 0.47 (0.54) | 0.08 | 0.31 |