Mapping the points on the face
You may be wondering how the numbers for the points on the face actually relate to a face. How might something just cover the right eye, such as a pirate eye patch? The answer lies on the clmtracker Github page (https://github. com/auduno/clmtrackr).
Here you will find an image with all 70 facial points shown in their relationship to the face. Using this as a guide it is possible to get hold of any point, such as the right eye using ‘positions’ for the x axis position and ‘positions ’ for the y axis position. The tutorial uses the points between each eye to work out the angle that the head is tilted and the scale of the head as each user is likely to be positioned at different depths.