Canon imageRunner 2004, User Manual, Page: 256 / 652

[Grain Correction]
Reduces graininess to create a smooth color tone when scanning photographs taken with high-speed film.
[High] dramatically reduces graininess, but may also reduce image sharpness or degrade image quality.
[Use Unsharp Mask]
Emphasizes the edges and lines in the image, creating a sharper appearance.
[Use Descreen]
Reduces the color unevenness and moire that occur when scanning printed images.
Adjusting Brightness and Color
Configure color settings such as brightness, contrast, and color tone. The displayed items vary depending on the
settings selected for [Color Mode] ( Specifying Settings for Documents and Color Mode(P. 244) ). When [Text
Enhanced] is selected, you cannot configure these settings.
(Brightness/Contrast)
Adjusts the brightness and contrast (the difference between the light and dark parts) of the image. To adjust
while checking on a graph, click on the upper-right of the screen.
[Channel]
● If you select [Color] for [Color Mode], you can adjust the [Red], [Green] and [Blue] color channels
separately. To adjust all three colors at the same time, select [Master]. You can combine the
adjustments made in [Master] and those made in the individual color channels.
● If you select [Grayscale] for [Color Mode], only [Grayscale] is displayed.
Using the Machine as a Scanner
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