23
similar frequencies. Make adjustments to the histogram only
when the colour balance of your scanned image does not match
the original picture.
Hint:
We suggest leaving the histogram set to
AUTO
when not encountering
colour depth discrepancies.
Figure 6. Histogram
Tone Map
enables you to modify the tonal range and to
adjust highlight, mid-tone, and shadow areas of an image. For
example: When an image is too dark or too light, it may have
hidden details that can be uncovered by using
Tone Map
. This
usually improves the contrast of an image. For example, when the
darkest tone is 65% black, you can use the
Tone Map
to make it
100% black.
Gamma
values follow a smooth curve, as seen below in
Figure 7. By adjusting the gamma, you can change the tonal
range of the selected
Channel
(colour). Gamma values are
primarily a measure of a channel’s brightness. The larger the
Summary of Contents for V1.2
Page 9: ...1 Chapter I Hardware Installation ...
Page 13: ...5 Chapter II Software Setup ...
Page 16: ...8 ...
Page 17: ...9 Chapter III Usage and Maintenance ...
Page 23: ...15 Chapter IV Using TWAIN ...
Page 35: ...27 Appendix A Troubleshooting ...
Page 38: ...30 Appendix B Customer Service ...
Page 40: ...32 Appendix C Index ...