Plugin Idea

Hello to all, i would like to know of someone can develop a plugin, wo can remove a color from a picture, for example if i have a "greenscreen" the plugin remove that color and the picture can be composited on another background in realtime.

this is a greenscreen: http://cdn.hollywoodcamerawork.us/plates/keying/hcw_tinted_glasses.png

thanks for reading this and tell me if someone can develop that, thanks.

<img src="smileys/smiley2.gif" border="0" align="middle">

PS: i know its posible because i saw a guy doing that in javascript if i remember well.

something like this example?

scirra.com/arcade/example/1528/colour-changer-example

no i mean something who can extract completly a color from a picture, like the example i put above.

excluding the fact that gimp can remove it in 2 clicks and give you a transparent background, this kind of thing is doable but some parts like the glasses lenses will stay as it is. So you'll be only able to replace a single color, other than that I found out that not every browsers may support the feature...

Anyway, I'll keep trying, maybe I find some workaround to make it works on all browsers <img src="smileys/smiley17.gif" border="0" align="middle" />

thanks :D