Table 1.
The extraction method of facial regions of interests.
| Region (region number) | Description | |
|---|---|---|
| Center point position | Radius | |
| Whole face | Determined by spline interpolation from points 1 to 17 and from 69 to 73. Lip, nose tip (31~36), eyes (43~48, 37~40), eyebrows (23~27 & 77~79, 18~22 & 74~76) regions and nonskin regions are excluded | |
|
| ||
| Forehead (1) | (pt20 + pt25)/2 + (pt28 − pt63)∗0.2 | Distance (center point, pt22) ∗ 0.7 |
|
| ||
| Upper cheek (2) | Left: pt31∗0.4 + (pt15 + pt16)∗0.3 Right: pt31∗0.4 + (pt2 + pt3)∗0.3 |
Distance (center point, pt47) ∗ 0.8 Distance (center point, pt42) ∗ 0.8 |
|
| ||
| Lower cheek (5) | Left: pt31∗0.25 + pt13∗0.75 Right: pt31∗0.25 + pt5∗0.75 |
Distance (center point, pt13) ∗ 0.7 Distance (center point, pt5) ∗ 0.7 |
|
| ||
| Nose (3) | (pt30 + pt31)/2 | Distance (center point, pt31) ∗ 1.4 |
|
| ||
| Chin (4) | pt9∗0.4 + pt58∗0.6 | Distance (center point, pt58) ∗ 0.8 |
|
| ||
| Lip | Determined by spline interpolation from points 49 to point 60 (outer) and from 61 to 68 (inner) | |