x-rite Checker SG

Scanner color calibration is carried out by scanning a calibration target and determining the transformation that maps the scanner RGB values to the known or measured colorimetric data for the calibration target. The calibration is accurate over the medium represented by the calibration target, but it is less so over other media.
                           ΔE2000
               average   90%      95%      max
Profile
SG-MP           1.31     2.03     2.27     4.87    (ver 4.8)
SG-PM5          1.55     2.72     2.92     3.37    (ver 5.0.10)
Kodak-MP        4.14     6.89     7.21     8.77
Kodak-PM5       5.13     7.14     7.76     9.25
Heid-MP         4.08     7.05     7.27     8.67
Kodak-PM-98a    4.06     6.50     7.36     8.62
V500 Generic    3.66     6.71     7.09     8.76    (by Epson)    

Profiling of Digital Cameras with the Gretag-Macbeth Digital Color Checker SG
Profiling input devices