.. _required-hardware: Required hardware for recording ================================ Two personal computers, a camera unit and forehead/chin-rest are necessary to use SimpleGazeTracker. **Personal computer for recording** This PC must have an appropriate interface to connect the camera unit (e.g. USB2.0) and a wired network interface. **Personal computer for presentation** This PC must have a wired network interface. Use of a decent graphics card is recommended for precise stimulus presentation. **Camera unit** See below for supported cameras. If the camera unit does not have integrated lighting, an infrared lighting unit is alos necessary. **Forehead/chin-rest** Current version of SimpleGazeTracker does not support head motion correction. It is necessary to restrict participant's head motion with a head/chin-rest. .. note:: If your PC is powerful enough, you can install both GazeParser and SimpleGazeTracker on a single PC. See :ref:`singlepc-recording` for detail. Supported camera ================= Currently, there are three editions of SimpleGazeTracker. **OpenCV edition (Windows/Linux)** This edition uses OpenCV to control camera unit. Supported cameras depend on OpenCV. **OptiTrack edition (Windows)** This edition supports OptiTrack `V100R2 `_ and `V120Slim `_ (NaturalPoint, Inc.). These cameras have USB2.0 interface and can capture images at 100 - 120 frames per second. See *Cameras used for development*. **CameraLink edition (Windows)** This edition currently supports CameraLink image grabbers manufactured by `Interface Corporation `_. Capturing frame rate depends on the specification of the connected camera. .. figure:: cam_pex530421.jpg **Flycapture2 edition (Windows/Linux)** This edition supports Point Grey Flea3 (USB3.0) cameras. See *Cameras used for development*. **DirectShow edition (Windows)** This edition supports DirectShow cameras.