Our initiative is to create a strong code base for the open source framework and software for particle tracking experiments, e.g. from Wikipedia:

“Particle tracking velocimetry (PTV) is one of velocimetry methods, i.e a technique to measure velocity of particles”. 3D-PTV is the three-dimensional method, measuring velocity and velocity gradients along particle trajectories.
Our main goal is to promote the 3D-PTV experimental technology and open it for the worldwide use. We are convinced that this technique can make an impact in various applications, allowing for the researchers and industry to get a deeper insight into their flows. Most of the flows are highly complex and turbulent and only few of them can get a limited low-dimensional or analytical description that explains the different flow phenomena. Experimental research is inevitable in observing the flow and discovering new phenomena, in addition to assisting to explain the old ones.

The 3D Particle Tracking Velocimetry (PTV) offers a flexible technique for the determination of velocity fields in flows. It is based on the visualization of a flow with small, neutrally buoyant particles and a stereoscopic recording image sequences of the particles.