Hi i need any source code or guidance on how to build a neural network for object detection using matlab...any one can help?much appreciated

You really have two questions: One, about implementing a neural network in MATLAB, and another, about applying neural networks to object recongition. In regard to both, I suggest examining what others have already done. Try searching on-line... there is a wealth of material available. I'd recommend any of the following search engines:

http://a9.com/
http://www.alltheweb.com/
http://www.altavista.com/
http://www.devilfinder.com/
http://www.teoma.com/

Try something such as:

"neural network" MATLAB -"Neural Network Toolbox"

or

"neural network" "object recognition" PDF

-Will Dwinnell
http://will.dwinnell.com

Hi there thanks for the suggestion much appreciated.

Cheers