### Welcome to Three-dimensional Particle Tracking software

Three dimensional particle tracking velocimetry (3D-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, i.e. in
Lagrangian framework, in three dimensions and in time. This is among
few techniques that can measure objects motion in the fluid flow of
whatever complexity, three-dimensionality and unsteadiness. It is
possible to obtain full field of velocity, velocity derivatives
along with the Lagrangian acceleration and its spatial derivatives
of higher moments.

## This software is not maintained anymore - follow the open source Particle Tracking Velocimetry software OpenPTV