Monochrome (black & white) image sensors provide slightly more effective resolution.Wide field of view allows more head movement but the camera can always be positioned further from the user to achieve the same result.CPU usage increases with resolution and frame rate.Resolution beyond 640x480 is largely unnecessary.Higher frame rates improve responsiveness.Security cameras and car reversing cameras are more likely to have infrared LEDs. Some webcams advertised with 'night vision' just use bright white visible LEDs that are blinding, so be sure the LEDs are actually infrared. Reflective material isn't as bright as using LEDs so the camera's infrared blocking filter may need to be removed. Manual exposure is essential for maximum stable frame rate in all lighting conditions and the ability to reliably isolate points.Ĭameras that don't allow autoexposure to be disabled are generally incompatible with optical tracking, refer to the camera compatibility list below.Ĭameras with built-in infrared LEDs are well suited to reflective tracking, those that only activate in the dark can be made to stay on by covering the light sensor. Other types of cameras may need a capture card for connection to PC. They typically have specifications of 30fps maximum frame rate, at least 320x240 resolution, 40 degrees field of view and have CPU usage.Īll have color sensors and an infrared blocking filter which can usually be removed to increase infrared sensitivity but sometimes requires permanent modification. Webcams are the most applicable camera to use with FreeTrack as they are common and inexpensive with good PC connectivity and most known brands are suitable for optical tracking.
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