Outdoor human motion capture by simultaneous optimization of pose and camera parameters

Ahmed Elhayek, Carsten Stoll, Kwang In Kim, Christian Theobalt

Research output: Contribution to journalArticlepeer-review

17 Citations (SciVal)


We present a method for capturing the skeletal motions of humans using a sparse set of potentially moving cameras in an uncontrolled environment. Our approach is able to track multiple people even in front of cluttered and non-static backgrounds, and unsynchronized cameras with varying image quality and frame rate. We completely rely on optical information and do not make use of additional sensor information (e.g. depth images or inertial sensors). Our algorithm simultaneously reconstructs the skeletal pose parameters of multiple performers and the motion of each camera. This is facilitated by a new energy functional that captures the alignment of the model and the camera positions with the input videos in an analytic way. The approach can be adopted in many practical applications to replace the complex and expensive motion capture studios with few consumer-grade cameras even in uncontrolled outdoor scenes. We demonstrate this based on challenging multi-view video sequences that are captured with unsynchronized and moving (e.g. mobile-phone or GoPro) cameras.
Original languageEnglish
Pages (from-to)86-98
Number of pages13
JournalComputer Graphics Forum
Issue number6
Early online date11 Dec 2014
Publication statusPublished - 23 Sept 2015


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