8-13Chapter 8 ISIS/TWAIN Driver SettingsHintIf all of the settings on the [Brightness] tab sheet are disabled, thegamma setting is set to Custom. (See “[Gamma Settings] DialogBox” on p. 8-14.)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 [Basic] tabsheet.[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.• When the [Auto] check box is selected, the sliderautomatically selects a brightness level to be used forautomatic adjustment.ContrastThis is enabled when the scanning mode is [Black andWhite]. The brightness and contrast are adjusted accordingto the document properties.[Use Back Side Brightness] Check BoxIf the brightness of the front and back of the documentpages is different, select this check box to adjust only thebrightness of the back side.[Use Back Side Contrast] Check BoxIf the contrast of the front and back of the document pagesis different, select this check box to adjust only the contrastof the back side.SettingAutoBrightnessContrastUse Back SideBrightnessUse Back SideContrastScanning ModesBlack and White ✔ ✔ ✔ ✔ ✔Error Diffusion – ✔ ✔ ✔ ✔Advanced TextEnhancement – ✔ – – –Advanced TextEnhancement II – ✔ ✔ – –256-level Gray – ✔ ✔ ✔ ✔24-bit Color – ✔ ✔ ✔ ✔Auto Color Detection – ✔ ✔ ✔ ✔
