The options are described below:

4.8.1 Gray

Figure Advance dialog (Gray)

♦Gamma Pattern

This option corrects distortions from nonlinear image representation. Scanner sensors are generally designed to generate output linear to the density of the light reflected from the document. However, most output terminals do not produce output that has the desired linear relation to the input, and the resulting distortion must be corrected.

One of the following can be selected as a correction pattern: "Normal", "Soft", "Sharp", "Download Pattern", or "Custom".

Some scanner models do not support this function. See "Relevant Image Scanner Specification" in Appendix.

When "Download Pattern" is selected, the above dialog box opens.

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