separate colors in a picture

Dear all, I would be grateful if someone could help me to find a solution to my problem.....I have a pictures and I need to divided in the 3 different colors that are present (i.e. yellow, blue, red). I don´t want to have the channel but other 3 picture with in each one only one of the colors. Thanks to all!

Answer 1

[yang]

if the three colors is R,G,B,i can for example I as a turecolor image R=I（:,:,1); G=I（:,:,2); B=I（:,:,3);

Answer 2

[Image Analyst]

See my color segmentation demos: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Post your picture to tinypic.com.