Merge branch 'm.boltes-master-patch-18030' into 'master'

Update ReadMe.md

See merge request !373

ReadMe.md

 # PeTrack
 
-Software for tracking pedestrians.
+For the understanding of the dynamics inside crowds reliable empirical data are needed enabling an increase of safety and comfort for pedestrians and the design of models reflecting the real dynamics. PeTrack (Pedestrian Tracking) automatically extracts accurate trajectories of marked pedestrians from video recordings. The joint trajectories of all pedestrians provide data like velocity, flow and density at any time and position. With such a tool extensive experimental series with a large number of persons can be analyzed. Individual codes enables personalized trajectories with static information of each participant (e.g. age, gender).
+The program deals with wide angle lenses and a high density of pedestrians. Lens distortion and perspective view are taken into account. The procedure includes calibration, recognition, tracking and height detection.
+Different kinds of markers (e.g. with height information, head direction, individual code) are implemented. With a stereo camera more accurate height measurements and also markerless tracking is possible.
 
 
 ## Installation, Uninstallation: