If you need this functionality within your document imaging system it will mean you need higher resolution to scan your documents. Higher resolutions and higher speeds mean higher costs. If you plan to print the image with a color printer, you'll need a higher resolution than you would just for viewing the image on your monitor. Higher bit color depths result in better shadows and finer detail. Interface A scanner may have either a parallel or a SCSI interface.
Parallel is generally slower, but offers easy hookup to any computer.
Software A scanner bundle should include an OCR package and an image-editing program. Find out whether the included programs are full working versions or limited versions that you have to upgrade. Click here for details .