Fast Feature pyramid for object detection

http://vision.cornell.edu/se3/wp-content/uploads/2014/09/DollarPAMI14pyramids_0.pdf

Implemented with C++ using Random forest, boosted decision tree

Yields similar performance with paper(Random forest: 14fps, Boosted Trees: 18fps)

ACF feature used

Result(green: GT, blue: detected pedestrian)