Table 4.

Results of sequential forward feature selection

Feature	Name	No. of selections (out of 20 times)
1	Mean	6
2	Standard deviation	20
3	Area	5
4	Bounding box	8
5	Centroid (x-coordinate)	5
6	Centroid (y-coordinate)	15
7	Convex area	11
8	Eccentricity	2
9	Equivalent diameter	3
10	Euler number	0
11	Filled area	1
12	Major axis length	3
13	Minor axis length	4
14	Orientation	3
15	Perimeter	2
16	Solidity	1
17	Object boundary_mean	6
18	Object boundary_standard deviation	4