IMAGE PROCESSING
24 February, 1999
2-52
Gamma (
γγγγ
) Correction (Printer Gamma)
(1) KCMY Gamma
Ideally, the gamma curves for Yellow, Magenta, Cyan, and Black are identical, as
shown in figure 1. However, they are not because electrical components always
vary slightly, resulting in varying gamma curves, as shown in figure 2.
The Auto Color Calibration (ACC) procedure can compensate for any
discrepancies in color reproduction. ACC makes new gamma curves for each color
in each mode (text, photo, Bk text). After ACC, the gamma curve for each color can
be adjusted with service programs (see Replacement and Adjustment, Copy Image
Adjustment)
Using these programs, each gamma curve can be adjusted using 4 different
modes: ID max., High ID, Middle ID, and Low ID, as shown on the following page.
If the previous gamma curve was better, the customer can recall it. Alternatively,
the factory settings can be loaded using SP 5-610-004. In addition, the factory
settings can be overwritten by the current gamma settings using SP5-160-005.
A259D528.WMF
K
A259D529.WMF
Fig. 1
Fig. 2
Summary of Contents for Aficio Color 4006
Page 230: ...SP MODE TABLE 24 February 1999 4 2 4 3 SP MODE TABLE See Appendix 2 ...
Page 359: ...SC TABLE 24 February 1999 7 2 7 2 SC TABLE See APPENDIX 3 ...
Page 364: ...APPENDIX 1 TIMING CHARTS ...
Page 369: ...APPENDIX 2 SP MODE TABLE ...
Page 436: ...APPENDIX 3 SC CODE TABLE ...
Page 467: ...APPENDIX 4 RSS Remote service system ...
Page 479: ...7 A259S101 WMF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Fig 1 ...
Page 480: ...8 A259S102 WMF 1 2 3 4 5 6 7 8 10 11 12 13 14 9 Fig 2 ...
Page 481: ...9 A259S103 WMF 1 2 3 4 5 7 8 9 10 11 12 14 15 13 6 16 Fig 3 ...
Page 482: ...10 A259S151 WMF 1 2 3 4 5 7 8 10 9 6 11 12 13 14 16 17 18 19 15 Fig 4 ...
Page 483: ...11 A259S105 WMF 1 2 3 4 5 6 7 8 9 10 Fig 5 ...
Page 484: ...12 A259S106 WMF 1 2 3 4 6 7 8 9 5 Fig 6 ...
Page 485: ...13 A259S107 WMF 1 2 3 4 5 6 7 8 10 11 9 Fig 7 12 ...
