Nuitrack  1.5.0
3D Skeleton Tracking Middleware
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What is Nuitrack™SDK?

Nuitrack™ is a 3D tracking middleware developed by 3DiVi Inc. This is a solution for skeleton tracking and gesture recognition, which enables capabilities of Natural User Interface (NUI) on Android, Windows, and Linux.

Nuitrack™ framework is multi-language and cross-platform. Nuitrack™ APIs include the set of interfaces for developing applications, which utilize Natural Interaction. The main purpose of Nuitrack™ is to establish an API for communication with 3D sensors.

The Nuitrack™ module is optimized for ARM based processors, which means that you can use it with Android devices and embedded platforms.


  • Full Body Skeletal Tracking (19 Joints)
  • 3D Point Cloud
  • User Masks
  • Gesture Recognition
  • Cross-platform SDK for Android, Windows and Linux
  • 3D Sensor independent - supports Kinect v1, Asus Xtion, Orbbec Astra, Orbbec Persee, Intel RealSense
  • Unity and Unreal Engine Plugins
  • OpenNI 1.5 compatible - OpenNI module allows you to move your OpenNI-based apps developed for Kinect and Asus Xtion to other platforms, including Android

Application areas:

  • Natural User Interface (NUI) for Windows/Linux/Android platforms
  • Games and Training (Fitness, Dance Lessons)
  • Medical Rehabilitation
  • Smart Home
  • Positional and Full Body Tracking for VR
  • Audience Analytics
  • Robot Vision

Nuitrack Skeleton System

Nuitrack can track up to six skeletons at one time. By default, two skeletons are tracked. You can set up the number of tracked skeletons as follows:

  1. Use Nuitrack API: take a look at tdv::nuitrack::SkeletonTracker::setNumActiveUsers (C++) or nuitrack.SkeletonTracker.SetNumActiveUsers (C#) method.
  2. Edit nuitrack.config file: in the section “Skeletonization”, set “ActiveUsers” to the desired value (up to 6 skeletons).

Each Nuitrack skeleton has 19 joints. Each joint has position and orientation. The skeleton scheme is shown in the picture below.