How do I decide which resolution to select when scanning from Epson Scan?
Resolution refers to how many dots per inch (dpi) or dots per centimeter (dpcm) your image contains. The best resolution for a scanned image depends on the type of image you're scanning. For most images except line art, use a scanning resolution that is approximately one third of your output resolution or a scanning resolution of approximately 240-300 dpi. For on-screen viewing, you can scan at 96 dpi.
Keep the following in mind when you choose a resolution: Higher resolution settings result in larger file sizes. For example, an 8.5 x 11-inch original scanned at 300 dpi can produce a 24MB file. The same original scanned at 96 dpi creates only a 2.6MB file.
Large files take longer to process and print, so consider the practical limitations of your computer system when selecting a resolution. To keep your file size manageable, select the lowest possible resolution that gives acceptable quality. When scanning at a higher resolution, reduce the file size by scanning only part of the image.
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