nose angle calculation

[mn73]

Hi,

as I understood it, the following facial landmarks are taken for nose angle calculation:

if xlist[26] == xlist[29]: #If x-coordinates of the set are the same, the angle is 0

But according to this, facial landmark 26 (or 27 because of 0-indexing) is a point of the eyebrow. Shouldn't those to points be located on the nose both?

Best regards,
Michael