opencv 으로 사람 추적, 자세
https://www.youtube.com/watch?v=56RCWQHrSIg
https://stackoverflow.com/questions/18336434/human-full-body-detection-contour-rather-than-rectangle/18337501
https://gist.github.com/yoggy/1470956
http://answers.opencv.org/question/90543/how-do-i-segment-the-actual-human-body-shape-from-an-image/
https://forum.openframeworks.cc/t/projecting-a-pattern-around-the-shape-of-a-human-body/24501
https://www.pyimagesearch.com/2016/04/11/finding-extreme-points-in-contours-with-opencv/
https://www.freelancer.com/projects/machine-learning/get-human-body-outline-from/
human pose estimation
https://www.google.co.kr/search?newwindow=1&ei=ooUrW7nJMMr58gXu3JeACg&q=human+pose+estimation+android&oq=human+pose+estimation+android&gs_l=psy-ab.3..0i203k1.3149371.3151066.0.3151218.8.5.0.3.3.0.249.684.2j2j1.5.0....0...1c.1.64.psy-ab..0.8.687...0j0i67k1j0i30k1j0i8i30k1j0i8i10i30k1.0.I-JU4mugJfM
https://github.com/edvardHua/PoseEstimationForMobile
http://webnautes.tistory.com/1034
http://hongkwan.blogspot.com/2013/01/opencv-5-5-example.html
https://github.com/atefm/Android-Object-Detection/blob/master/app/src/main/java/com/example/root/androidobjectdetection/MainActivity.java