8-14Chapter 8 ISIS/TWAIN Driver Settings[Brightness] Tab SheetOn the [Brightness] tab sheet you can adjust brightness andcontrast for scanning, and access gamma settings. Theavailability of brightness and contrast settings depends on themode setting of the [Basic] tab sheet.HintIf all of the settings on the [Brightness] tab sheet are disabled, thegamma setting is set to Custom. (See “[Gamma Settings] DialogBox” on p. 8-15.)The availability of brightness and contrast settings are asfollows, according to the mode setting on the [Basic] tabsheet.✔ : available for setting, – : not available for setting, or auto■ [Brightness] Tab Sheet SettingsYou can configure the following settings on the[Brightness] tab sheet.[Auto] Check BoxThis is enabled when the scanning mode is [Black andWhite]. The brightness and contrast are adjusted accordingto the document.BrightnessAdjusts the brightness of images to be scanned.Hint• If images are too dark or if text on the back of a sheet bleedsthrough, you can drag the slider to the right to increase thesetting.• If images are too light, drag the slider to the left to decreasethe setting.SettingAutoBrightnessContrastEnable Back SideBrightnessEnable Back SideContrastScanning ModesAuto Color Detection – ✔ ✔ ✔ ✔Black and White ✔ ✔ ✔ ✔ ✔Error Diffusion – ✔ ✔ ✔ ✔Advanced TextEnhancement – ✔ – – –Advanced TextEnhancement II – ✔ ✔ – –256-level Gray – ✔ ✔ ✔ ✔24-bit Color – ✔ ✔ ✔ ✔
