Chapter 7 ISIS/TWAIN Driver Settings
The availability of brightness and contrast settings are as follows according to the mode setting on the [Basic] tab sheet.
Scanning mode | Auto | Brightness | Contrast | Back Side | Back Side |
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| Brightness | Contrast |
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Black and White | ✓ | ✓ | ✓ | ✓ | ✓ |
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Error Diffusion | — | ✓ | ✓ | ✓ | ✓ |
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Advanced Text Enhancement | — | ✓ | — | — | — |
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Advanced Text Enhancement II | — | ✓ | ✓ | — | — |
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— | ✓ | ✓ | — | — | |
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— | ✓ | ✓ | ✓ | ✓ | |
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— | ✓ | ✓ | ✓ | ✓ | |
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Auto Color Detection | — | ✓ | ✓ | ✓ | ✓ |
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✓ : Available for setting |
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[Auto] Check Box
This check box is enabled when the scanning mode is [Black and White], and selecting it adjusts brightness and contrast to match the document.
Brightness
Adjusts the brightness of images to be scanned.
☞If images are too dark or if text on the back bleeds through, you can drag the slider to the right to increase the setting.
☞If images are too light, drag the slider to the left to decrease the setting.
☞When the [Auto] check box is selected, the slider selects a brightness level to be used for automatic adjustment.
Contrast
Adjusts the contrast of images to be scanned.
[Use Back Side Brightness] Check Box
If the brightness of the front and back of the document pages is different, select this to adjust only the brightness of the back side.
[Use Back Side Contrast] Check Box
If the contrast of the front and back of the document pages is different, select this to adjust only the contrast of the back side.
[Gamma] Button
This button opens the [Gamma Settings] dialog box, where you can adjust the gamma curve.