normal smile face detection viola jones algorithm

From google: The Viola-Jones algorithm is a widely used mechanism for object detection. The main property of this algorithm is that training is slow, but detection is fast. ... Then the detection window is moved across the image as follows: Set the minimum window size, and sliding step corresponding to that size.

all haarcascade feature:

https://github.com/opencv/opencv/tree/master/data/haarcascades

voila-jones paper:

(https://github.com/riju18/normal_smile_face_detection_voila_jones_algorithm/files/3592175/10.1.1.10.6807.pdf)

meachanism:

will be updated soon

inspired by:

https://www.superdatascience.com/

sample:

smile face detection (static image):