Proreflex mcu240

The Test room contained a force-measuring pen, custom-built by Solutions for Research (https://www.solutionsforresearch.co.uk/) and consisting of a 1.31 ×1.33 m load platform fitted with four load cells surrounded by 1 m high walls, three of which were made of 2” wire mesh whilst the fourth had a clear polycarbonate guillotine door through which pigs could enter. Fast capture video cameras (3 monochrome Point Grey Dragonfly Express cameras running at 200 Hz) were positioned on two sides of the force-measuring pen and overhead, with the overhead position normalised by considering the location of the four corners of the pen. A standard video camera was set up for filming from one side of the pen. A Microsoft Kinect v1 camera running at 30 Hz and collecting RGB and depth data was also positioned above the pen. During weeks 4 and 12 of the study, Kinematic data were collected using four infrared Qualisys cameras (ProReflex MCU240, Qualisys AB, Goteborg, Sweden) running at 200 Hz and positioned at the four corners of the pen. The set-up is shown in Fig. S1 in the Supplementary Information which also contains information on data capture and synchronisation.