FujiFilm FN-PS551 Service Manual page 418

Appendix Chapter 2. Service Utility-Additional Instructions
1.2 Summary of SAR (Smooth curve ARranging) Tone Correction
With SAR tone correction, the gamma curve (reference gamma curve, gamma tables No. 11 to 50)
represents a relationship between input QL (quantum level) and output density D. The QL is image data
that represents the density per pixel, and is denoted by a 10-bits digital value (integer value from 0 to
1023).
Note that with SAR tone correction, the conversion table that corresponds to the density on output film
can be represented.
Output density D
3.0
2.0
1.0
Input/Output Relationship in the Gamma Table (SAR Scheme)
With SAR tone correction, the gamma curve is adjusted and varied by wholly or partially tweaking the
reference gamma curve.
Overall Adjustment (Adjustment of maximum and minimum density)
Adjust the overall density of the reference gamma curve by varying the Max. density and Min. density
parameter values. The gamma curve is increased or decreased in the input density D direction according
to the value of Max. density and Min. density.
The input range for Max. density and Min. density is from 0 to 300 (corresponding to 0 to 3.00 in
density), provided that Min. density < Max. density.
Output density D
Max.
density
Min.
density
Overall Adjustment (SAR Scheme)
006-251-00
10.30.98 FM2327
0
1023
Reference gamma curve
0
Input QL
FP4G0205.EPS
Gamma curve after adjustment
Input QL
FP4G0206.EPS
FN-PS551 Service Manual
Appendix-21
Appendix-21