Xerox ® DocuMate® 5445 / 5460User’s Guide178Remove BackgroundAutomatically detect the background color of the scanned item and set it to white in the image.Initialize White Level From DocumentAutomatically detect and adjust the white level using the leading edge of the scanned item. This is a feature thatuses the scanner for processing and it is available whether or not Visioneer Acuity is installed. However, please notethat there will be a black line at the top of each image. This is where the scanner starts the image capture as thereference point for it to detect and set the background as white in the image.When Visioneer Acuity is installed, we recommend you use Remove background if you want to have the backgroundautomatically removed without seeing this black line.White LevelWith this option you can set what the scanner should interpret as “white” in the final image, even though the pagebeing scanned may have a shaded or off-white background. You may want to adjust this option to have the imageautomatically corrected when you are scanning irregular paper, such as thick or thin paper, that may cause thewhite page in the final image to appear shaded with a pale grey. This option is only available when scanning inColor or Gray.For the best automatic results you can simply select the type of paper you are scanning from the list. Alternatively,you can input a number in the Custom value field. The value you set in this field can be from 128 to 255. If you setthe custom value to 128 you are telling the scanner that all pixels that are grey level 128 or higher (lighter) shouldbe changed to white in the final image. If you set the custom value to 255, you are telling the scanner that only purewhite is white and anything lower than 255 should remain unchanged in the final image.Gray scan Gray scan with Smooth backgroundColor scan Color scan with Remove background
