电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 5.Fidelity Criteria o The error between two functions is given by: e(x,y)=f(x,y)-f(x,y) ● So.the total error between the two images is M-1N-1 ∑∑fx,y)-f(x,] x=0y=0 The root-mean-square error averaged over the whole image is 明5. Fidelity Criteria 2 1 0 1 0 [ ( , ) ( , )] 1 [ ( , ) ( , )] ( , ) ( , ) ( , ) f x y f x y MN e f x y f x y e x y f x y f x y rms M x N y               The error between two functions is given by:  So, the total error between the two images is  The root-mean-square error averaged over the whole image is