If the above condition is satisfied then eyes are considered
as open otherwise closed. When the eyes are closed then
there will be no circles in the image and algorithm calculates
a false distance between the peaks that may be different than
the previous frame value, also the difference between frames
i.e. previous and current frames denoted as ’dd’ crosses
tolerance value 10, then in this case the given condition fail
and decision goes to close eye. Drowsy condition is detected
by open and closing condition of eye.