https://bugs.kde.org/show_bug.cgi?id=372340

--- Comment #17 from Chandra Kant <chandra.kant.ee...@itbhu.ac.in> ---
The main idea  is to compute vertical and horizontal sobel for nose part and
find the angle between them. Then to determine which angle is dominant with
help of histogram and  use its peak value in finding the best rotation of face.
This part can be improved by normalizing the histogram on start and then using
just values from one face rotation angle to determine the angle between
vertical position and current angle.

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