Multiple$-$choice $(10$ points$)$

Viola and Jones developed a very efficient face recognition algorithm. Which of the statements are correct?

A The face detector is pose independent.

B It uses a set of piece wise linear filters as features.

C The use of cascaded classifiers is key to make this algorithm computationally efficient.

$q,$ D At every stage of the classification process we use as many features as possible to make sure we don't miss any faces.