Speed and quality of image fusion are restricted each other,image fusion in real time is one of the problems to be studied and solved urgently at present.The problem was solved to a certain extent by the proposed image fusion technology based on windowing.The criterion of the image fusion based on windowing was given,the calculating methods of the suitable scope and the maximum windowing area for the fusion were determined,and the approximate calculating formula of the maximum windowing area was obtained.Th...