Setting The Gamma Value Correctly - Canon FS 3.6 User Manual

Setting the Gamma Value Correctly

Different display models tend to reproduce color tones in characteristic ways that
are expressed with a gamma value. Most displays fall within a range from 1.4 to
2.2, which reproduces tones that are slightly darker than the original. To faithfully
reproduce the original tones, it is necessary to correct the display's gamma value
with CanoCraft FS.
The program normally adjusts the display's gamma value to 1.8, but if your display
does not operate at this value, you will need to adjust it.
Display Gamma Value vs. CanoCraft FS Gamma Value
CanoCraft FS and your display each have their own distinct gamma value,
which is defined as the coefficient each program or device uses to match its
output data to its input data. For CanoCraft FS, the input data is the image
data it receives from the scanner and the output data is the data it sends to
the display.
For the display, the input data is the image data it receives from CanoCraft FS
and its output is the image that appears on its screen. CanoCraft FS
automatically calculates its gamma value as the inverse of the display gamma
value that you specify. If, for example, the display gamma value is set to 1.8,
the scanner gamma value is automatically set to 0.56.
• Please read the documents shipped with your display or contact the
manufacturer's customer service department to obtain the correct gamma
value for your particular display model.
Step 3 • Adjusting Images
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