how to recognize three different colors and when one is recognised to do an action

hello everyone this is my first question and i am new to this "forum" so don't be mad if this question was asked earlier.

Is it possible to recognize 3 different colors (red,green,yellow) I am doing an project "traffic lights" and i need to write a program in matlab which recognizes 3 different colors red green and yellow and when the recognized color is green i would do action number 1 ,if it is yellow i would do action number 2 ....

It should be like this: a robot is moving and when seeing an object he turns web-cam on and now i have to determinate which color i see if it is r/g/y.

So my question is if i identify a color lets say it is green How can i say do action number 1.How to fuse the results of an image with code.

like switch: case1:green case2:yellow case3:red..

any ideas how this can be done

thank you very much for every help

Answer 1

[Image Analyst]

See my color segmentation demos for several ways to do color detection and location: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

[samir]

ok thank you i will have a look at this