I need help for my program

I want to build a program which can do detect body key points and compare to other video. I guess i need descriptor for key points and matcher for compare. But i don’t know which descriptor and matcher better for me.

**I apologize if i did anything wrong. I am writing for the first time in this forum

you can do nthat using opencv’s dnn module.

we have a nice (even python!) sample here
using either the COCO model(18 parts): http://posefs1.perception.cs.cmu.edu/OpenPose/models/pose/coco/pose_iter_440000.caffemodel
and https://raw.githubusercontent.com/opencv/opencv_extra/master/testdata/dnn/openpose_pose_coco.prototxt

or the MPI model(16 parts):

it will output landmarks like :