Plustek 8100 - Инструкция по эксплуатации - Страница 24

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•  If  you  like  to  adjust  the  histogram  for  a  RGB  color  

channel  separately,  select  it  with  respectively  colored  

button above the curve. The gray button stands for all 

three color channels.

•  The slider “Color Cast Removal“ removes color casts the 

more it is pushed to the right.

4-3. Gradation

In photography the gradation or den-

sity curve describes the relationship between 

exposure and optical density of the film. The 

slope of the curve is called gamma value, the  

difference between maximum and minimum 

density is called density range. Adjusting the 

gradation curve can work out more details in 
shadows and highlights.

•  Move  the  midtone  slider  below  the  curve  to  control 

the overall brightness. You can also adjust the contrast 

with the corresponding slider. For fine tuning you 

can directly move the curve control points with your 

mouse.

•  If  you  like  to  adjust  gradation  of  any  RGB  color  chan-

nel  separately,  click  onto  any  of  the  red  green  or  blue 

button above the curve. The gray button stands for all 

three color channels.

4-4. AACO (Auto Adaptive Contrast Optimization)

AACO is a tool for correcting contrast in dark-

er image areas without influencing details in 

lighter areas. Thus, AACO can be very useful to 
uncover more details in dark areas.

•  Choose “Low Effect“, “Normal Effect“ or “High Effect“ as 

preset  in  the  controls  dock  for  low,  medium  or  strong 

contrast enhancement.

4-5. GCC (Global Color Correction)

Control the color balance of the whole image 

with SilverFast Global Color Correction. Color 

casts, that often appear on older film and slides, 

can already be removed before scanning. 

•  For  a  global  color  correction  simply  move  the  black 

dot inside the color wheel to a suitable position. Any 

change is immediately displayed in the preview win-

dow.

•  For  fine  tuning  you  can  use  your  mouse  to  click  on 

one of the color patches positioned around the color 

wheel.  The  color  balance  of  the  image  will  then  shift 

towards that color.

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