real time red color detection

1) i want to detect pure red color real time for that wat i am using is purered=red-green-blue

then

using purered>/<threshold....e.g.....purered>60 or purered<60

but i have to adjust this threshold manually whenever there's any change e.g change in location of cameras /scenario is there any way to make it auto?

[Yash]

read the exact pixels an apply thresholding then

Answer 1

[Image Analyst]

This is asked so often it should probably be on the FAQ. Have you checked the File Exchange for submissions like http://www.mathworks.com/matlabcentral/fileexchange/28757-tracking-red-color-objects-using-matlab?

[awais rehman]

yes but unable to detect

[Image Analyst]

So adapt it. My color segmentation demos might help: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862