Features

[shruthi-22]

can you say what does detectmultiscale return ?

How is nose detected ?

[surya-veer]

Hi @shruthi-22, detectmultiscale returns the list of the detected object as a rectangle. read this for more

So I am doing as an estimation to detect nose, since the face is symmetric and the nose lies on the centre of eyebrow line and chin.
Now assume
face boundary = (x1,y1) and (x2, y2)
nose coordinates will ((x1+x2)/2, (y1+y2)/2)