8-9Chapter 8 ISIS/TWAIN Driver SettingsIMPORTANT• Selecting [High-Quality Moire Reduction] produces high-quality images, but the scanning speed is slower.• If [High-Quality Moire Reduction] is selected, [Auto-detection]is selected for the document size, the color mode is set to [24-bit Color], and the scanning side is [Duplex], the scanner mayrun out of memory and be unable to scan the entire document.If this occurs, enable [Speed Priority] and scan images oflower quality, or set the scanning side to [Simplex].Image QualityWhen the scanning resolution is set to 400 or 600 dpi, youcan enable this setting and select either [Speed Priority] or[Image Quality Priority].[Speed priority]This mode gives priority to scanning speed, and generatesimages of 400 or 600 dpi from images scanned at 300 dpi.[Image quality priority]This mode gives priority to image quality, and scans at600 dpi.When the resolution is set to 400 dpi, images of 400 dpi aregenerated from images scanned at 600 dpi.IMPORTANT• Selecting [Speed priority] increases the scanning speed, butthe image quality is reduced slightly.• If [Image quality priority] is selected, [Auto-detection] isselected for the document size, the color mode is set to [24-bitColor], and the scanning side is [Duplex], the scanner may runout of memory and unable to scan the entire document. If thisoccurs, enable [Speed priority] and scan images of lowerquality, or set the scanning side to [Simplex].[Scan Options] (TWAIN driver only)Specify the operation when scanning continuously with aTWAIN-compatible application program.[Standard]Outputs each scanned page before scanning the next page.[Scan Ahead]Scan pages continuously. Scanning speed is faster than[Standard].[Scan Single Page]The [Scanning Side] setting on the [Basic] tab sheet ischanged to [Simplex], and one page is scanned.[Area] buttonOpen the [Scan Area] dialog box to specify the area toscan. (See “[Scan Area] Dialog Box” on p. 8-11.)IMPORTANTThe [Area] button is not displayed if the application programprovides its own function to specify the scan area.