A.0.1 B.0.2 C.1.0 D.1.1 E.1.2
A.0.1~0.2 B.0.25~2.0 C.2.1~3.0 D.3.1~4.0 E.4.1~5.0
A.D=lg(I0/I) B.D=lg(I/I0) C.D=log2(I0/I) D.D=log2(I/I0) E.D=log5(I0/I)