Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Guide de l'utilisateur télécharger pdf (Page 315)

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9A-24 A-63054 February 2004

Automatic Threshold—when Automatic Threshold is enabled, image

processing parameters (e.g., Threshold and Contrast) are automatically set in

accordance with the scanning resolution. Any Threshold and Contrast settings

are ignored. Four options are available:

• Manual—Automatic Threshold is disabled. This is the default.

• Level 1—suitable for dark documents.

• Level 2—suitable for normal documents

• Level 3—suitable for light documents.

NOTES: Automatic Threshold is available only when None (binary mode) is

selected in Dithering.

When Automatic Threshold is enabled, all other imaging processing

parameters (i.e., Noise filter, Enhancement, and Gamma Control) are

ignored and therefore disabled.

When scanning in duplex mode, the Automatic Threshold setting for

the front and rear Image Setup must be the same. As a result, the

Automatic Threshold setting for the front Image Setup will be used for

both the front and rear images.

Gamma Correction—this option is available only when Dithering is enabled.

Dithered data from the scanner is converted to output by a gamma correction

curve, which is the curve of the shade adjustment. There are two selections:

Normal and For CRT. When you are scanning mainly for the purpose

of viewing a picture on a computer screen, select For CRT. The default

is “Normal.”

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Adaptec 1542CP - Storage Controller Fast SCSI 10 MBps Guide de l'utilisateur Page 315

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