Epson Expression 800 User Manual - TWAIN 32 - Page 22
Basic Scanning, unaware
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In some instances, you may want to create a large file-such as when you'll be enlarging a small scanned original in your application program and want to retain a high image quality. In that case, you may want to select a resolution between 1200 and 2400 dpi so you can enlarge it later with good results. In other instances, you may be unaware that your settings are too high for your image. For example, if you're enlarging an image's size in SilverFast Lite so the scanned file loads into your application already enlarged, you may not need to select as high a resolution for a successful scan. Your settings are creating a file that may be slow to process and burdensome to your system resources. If you move the resolution slider to a very high resolution for its size, you see a message warning you that the software will be "interpolating" the resolution you selected. This means that the software must add pixels to your image to achieve the resolution you chose, but may not increase your image quality. If you see this warning message, you may want to lower the resolution setting. Basic Scanning Page 22