Canon 4207B002 User Manual - Page 215

Setting Threshold Page 215 of 334 pages On-screen Manual > Scanning Guide > Correcting Images and Adjusting Colors with ScanGear (Scanner Driver) > Setting Threshold Setting Threshold The brightness of color and grayscale images is expressed in a value between 0 and 255. However, in creating black and white images, all colors are mapped to either black (0) or white (255). "Threshold" is the borderline value that determines a color as black or white. By adjusting the threshold level, you can sharpen text in a document or reduce show-through in newspapers. This function is available when Color Mode is Black and White. In ScanGear (scanner driver)'s Advanced Mode tab, click (Threshold). Note Click Defaults to reset all adjustments in the current window. Adjusting Threshold Move (Slider) to the right to increase the threshold value and thus increase the black areas. Move the slider to the left to decrease the value and thus increase the white areas. You can also enter a value (0 to 255). Page top