Thanks for the reply. It does clarify some confusions. But it still doesn’t solve the problem. Since the intersted peak is stronger than the reference peak (such as matrix peak) in some location of image, the quotient will then be larger than 1. However the output window only display from 0 to 1. And those area (relative intensity higher than 1) will be display as dark area (low density area). How can I adjuste it?
