This repository contains a multi-view optical motion capture system with support 3D visualizations. It includes a multi-camera calibration tool.

It is composed by the following modules:

• Capture module:
  • Sinchronized capture using Optitrack cameras (but can easily be extended to any type of camera by implementing the adequate interfaces)
  • Dynamic 2D visualization of the cameras feed
• Calibration module:
  • For intrinsics: charuco based calibration [1][2]
  • For extrinsics: charuco board pose estimation + nister 5-point algorithm [3]
  • Dynamic 3D visualization of calibration board
• Human pose estimation module:
  • OpenPose 3D module with CERES non-linear optimization [4]

The following libraries were used:

• OpenCV 4.1.0 + Contrib Modules (aruco)
• OptiTrack Camera SDK 2.1.1
• OpenPose 1.5 (customized)
• VTK 8.2
• Boost 1.67

[1] S. Garrido-Jurado, R. Muñoz-Salinas, F. J. Madrid-Cuevas, and M. J. Marín-Jiménez, "Automatic generation and detection of highly reliable fiducial markers under occlusion", PR, 2014.

[2] Z. Zhang, "A flexible new technique for camera calibration," TPAMI, 2000.

[3] D. Nister, "An efficient solution to the five-point relative pose problem," TPAMI, 2004.

[4] C. Zhe, S. Tomas, W. Shih-En, S. Yaser, "Realtime Multi-Person 2D Pose Estimation using Part Affinity Fields", CVPR, 2017.