Find some examples about the usage of the externals pix_freenect, pix_openni, pix_threshold_depth, pix_depth2rgba, pix_head_pose_estimation on the Github page http://github.com/kronihias/pd-kinect-examples

In the moment just Mac OSX binaries of the externals are included. Windows binaries coming soon. Linux – please get the source from Github and build them by yourself.