Hi, Cyrill! My name's Artur. Thanks for your previous lessons of Photogrammetry (2015), it's being very useful. I'm a forensic investigator here in Brazil. If I may ask, what algorithm or tool would you suggest to be the best way to determine as precisely as possible the height of a suspect of murdering a seven years old child, 4 years ago here in my State, a crime yet unsolved. He was caught on an IR camera walking, but the resolution of the video is only 352x240. I have the camera and their intrinsic parameters (from matlab toolbox calibration). I can also reinstall the camera back at the same pose as the day of the crime. Thanks again! I hope that in the near future, based on your lessons, to be able to reconstruct de 3D model of the suspect's face.