A Hybrid DE-RGSO-ELM for Brain Tumor Tissue Categorization in 3D Magnetic Resonance Images

Table 1

3D feature directions.

3D texture directions
	Offset	Degree direction (𝜃,𝜙)
1	0, 1, 0	0°, 0°
2	−1, 1, 0	45°, 0°
3	−1, 0, 0	90°, 0°
4	−1, −1, 0	135°, 0°
5	0, 1, −1	0°, 45°
6	0, 0, −1	0°, 90°
7	0, −1, −1	0°, 135°
8	−1, 0, −1	90°, 45°
9	1, 0, −1	90°, 135°
10	−1, 1, −1	45°, 45°
11	1, −1, −1	45°, 135°