Table 3 Shape and geometric features.
From: Refining skin lesions classification performance using geometric features of superpixels
Features | Graphic illustation | Features description |
|---|---|---|
Area |
| The area is the number of pixels in a region. It is marked in black |
Perimeter |
| The perimeter is distance between each adjoining pair of pixels around the border of the SP. It is marked in black |
Orientation |
| The orientation is the angle between the x-axis and the major axis of the ellipse fitting the SP. Its values range from − 90° to 90° |
Major axis length |
| The length of the major axis of the fit-ellipse |
Eccentricity |
| It is the ratio of the distance between the foci of the fit-ellipse and its major axis length. The value is between 0 and 1 |
Convex area |
| It is the number of pixels in a convex image |
