Logarithmic Display
•Uniformly partitioning the displayable intensity range into equidistant arithmetic intervals is wasteful •Each intensity should differ from the previous by a constant ratio.
•I0  = minimum non-zero displayable intensity
•In  = maximum displayable intensity = 1.0
•I1  = r I0,             I2  = r I1 = r2 I0 ,           I3  = r I2 = r2 I1 = r3 I0
•In  = rn I0   Þ   r = (1/ I0)1/n