Canon 3624B002 User Manual - Page 119

[Brightness] Tab Sheet On the [Brightness] tab sheet you can adjust brightness and contrast for scanning, and access gamma settings. The availability of brightness and contrast settings depends on the mode setting of the [Basic] tab sheet. Chapter 8 ISIS/TWAIN Driver Settings The availability of brightness and contrast settings are as follows, according to the mode setting on the [Basic] tab sheet. Setting Enable Back Side Contrast Enable Back Side Brightness Contrast Brightness Auto Scanning Modes Hint If all of the settings on the [Brightness] tab sheet are disabled, the gamma setting is set to Custom. (See "[Gamma Settings] Dialog Box" on p. 8-15.) Auto Color Detection - ✔ ✔ ✔ ✔ Black and White ✔ ✔ ✔ ✔ ✔ Error Diffusion - ✔ ✔ ✔ ✔ Advanced Text Enhancement - ✔ - - - Advanced Text Enhancement II - ✔ ✔ - - 256-level Gray - ✔ ✔ ✔ ✔ 24-bit Color - ✔ ✔ ✔ ✔ ✔ : available for setting, - : not available for setting, or auto ■ [Brightness] Tab Sheet Settings You can configure the following settings on the [Brightness] tab sheet. [Auto] Check Box This is enabled when the scanning mode is [Black and White]. The brightness and contrast are adjusted according to the document. Brightness Adjusts the brightness of images to be scanned. Hint • If images are too dark or if text on the back of a sheet 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. 8-14