Canon DR-4010C - Manual (Page 109)

Chapter 7 ISIS/TWAIN Driver Settings
7-14
The availability of brightness and contrast settings are as follows according to the mode setting on
the [Basic] tab sheet.
✓ : Available for setting
— : Not available for setting, or automatically set
[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.
Scanning mode Auto Brightness Contrast Back Side
Brightness Back Side
Contrast
Black and White ✓ ✓ ✓ ✓ ✓
Error Diffusion —
✓ ✓ ✓ ✓
Advanced Text Enhancement — ✓ — — —
Advanced Text Enhancement II — ✓ ✓ — —
High-Speed Text Enhancement —
✓ ✓
— —
256-level Gray —
✓ ✓ ✓ ✓
24-bit Color —
✓ ✓ ✓ ✓
Auto Color Detection —
✓ ✓ ✓ ✓