Canon imageCLASS MF5770 imageCLASS MF5700 Series Software Guide - Page 141

■ [Threshold] By clicking , you can access the [Threshold] dialog box. If [Black and White] is selected in [Color Mode], the Color Settings buttons will become the [Threshold] button. NOTE • The brightness of color and grayscale images are expressed as a value between 0 and 255 but brightness of black and white images is expressed in terms of either black or white including the parts of an image which are a color between the two. The boundary at which black and white is divided is called Threshold. • By adjusting the threshold, you can sharpen characters in a text document and reduce back-printing such as in newspapers. 3 Scanning [Threshold Level] Move the [Threshold] slider to the right to increase the threshold value and thus reduce the white areas (black areas will increase). Move the slider to the left to decrease the threshold value and thus increase the white areas (black areas will reduce). You can also enter a value (0 to 255). [Reset] Resets all the current settings to their default values. Setting Preferences and Scanning with ScanGear MF 3-39