Chapter 7 ISIS/TWAIN Driver Settings

☞Documents with low-contrast text can be made more readable by adjusting Contrast on the [Brightness] tab sheet.

☞If the background is non-uniform, such a pattern, the background remains visible in the image, and text may be hard to read.

[High-Speed Text Enhancement]

This mode optimizes processing speed by performing background processing within the scanner, and is good for scanning documents with light background and dark text.

☞If the text and background in a document have nearly the same density, the text may be hard to read.

☞Areas with uniform background may appear as non-uniform white in the image.

☞Because background processing is performed within the scanner, scanned images are more susceptible to lines appearing due to dirt on the scanning table glass. In cases where this may be a problem, try scanning again after cleaning the scanner glass, or select one of the [Advanced Text Enhancement] or [Advanced Text Enhancement II] modes instead.

[256-level Gray]

Scans documents such as photos as 256-level grayscale images.

[24-bit Color]

Scans documents such as color photos as full-color images.

[Auto Color Detection]

Whether a document is black and white or color is detected before the scanned image is saved.

☞When [Auto Color Detection] is enabled, the [Setting] button is enabled for opening the [Auto Color Detection] dialog box, where you can make settings affecting how color documents are judged, and select which scanning mode to use for black and white.

☞Depending on the application program, operation may become unstable when [Auto Color Detection] is enabled. In that case, [Auto Color Detection] should be disabled.

☞When using an application that supports the MultiStream function (such as CapturePerfect), if [Auto Color Detection] is selected, the MultiStream function is disabled.

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