FreeTrack Forum

I was thinking a little bit about how FT works and the following came up. Currently FT uses a lets say binary way of functioning. By using IR LEDs and a visible light filter you create a black background with white/light blue light spots. FT either spots lightsources on the background or it doesn't.. yes or no.. 1 or 0.

Now lets assume you use FT in a room of which you're certain that there'll be no green light for example, nor will there be green surfaces that clearly reflect environmental light. Instead of using a visible light filter and IR LEDs you have the FT software record the full visible color spectrum.

Where FT at first either tracked a lightsource or didn't, you now set up the FT software to only track lightsources between a RGBmin. and RGBmax. value and not just any lightsources it detects on a black background. In this case these RGB values would be light green to dark green. Would this idea be possible?

This method wouldn't require you to alter webcams in anymore and you could buy any ordinary LEDs instead of IR LEDs. You just have to be sure there's no lightsource/reflective surface with a color similar to the LED's glow in the recording zone of the webcam.

Guilio @ 06/10/2009 - 14h47 a dit:

set up the FT software to only track lightsources between a RGBmin. and RGBmax.

I think a physical filter is always going to be better than a digital filter.
Try using color filters, for example, if you are using red LEDs you should use a red filter.

ehm, sure you could do this. but what for? you even could use normal "white light" leds and play in a totally darkened room. or you could use very cheap color filters and use green/red/blue/xyz leds.

but again: what for? IR light works so nice because you can use it to track while sitting in a bright-lid room (artificial light, not sunlight). so?