The Raven Scanner offers multiple quality resolutions (dpi) for scanning, including 200dpi, 300pdi, 400dpi and 600dpi. The higher the dpi, the greater the quality and size of the digital scanned file, but the slower the scan speed.
For most documents, 300 dpi is sufficient enough to be of good legibility and to provide adequate OCR results. In some cases 200 dpi may be adequate for simply retaining a print copy of a document.
Scans at 400 and 600 dpi will results in slower scan speeds as the scanner detect fine details in your document. The 400 and 600 dpi resolutions are recommended for scans with photos or images, or intricate documents.