Scaling (Resizing) Images; One-Touch Scanning; Batch Scanning - Epson Perfection 636U User Manual

Epson perfection 636u: user guide

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The EPSON Perfection 636U's maximum hardware resolution of 600 2400 dpi is

achieved through EPSON's advanced Micro Step Drive technology. This technology

enables the EPSON Perfection 636U to achieve a maximum sub-scan or vertical

resolution of 1200 dpi or 2400 dpi using "half-stepping" and "quarter-stepping" of

the scanning carriage to double and quadruple the optical resolution. To prevent

enormous file sizes when scanning at the maximum hardware resolution, EPSON

recommends a maximum scan window of 4 11.7 inches. Full 8.5 11.7 inch

scanning is available at a sub-scan resolution of 1200 dpi or 9600 dpi interpolated.

Scaling (Resizing) Images

If you plan to enlarge your image, it is better to enlarge it when you're scanning rather

than in your application. Each time you modify an image, you lose some quality.

Keep in mind when you enlarge a small photo, such as a 35 mm slide or wallet-size

photo, you'll need to scan at a high enough resolution to retain your image quality,

but not so high that your file size is too large to be efficient.

You must manually adjust the resolution (dpi) to maintain the same image quality

when you resize your image. For example, if you have a 300 dpi 2 2-inch image that

you want to enlarge to 4 4 (a factor of 200%), increase the Scale setting to 200%

and change the resolution to 600 dpi.

Your EPSON Perfection 636U features a one-touch scanning button. With

one-touch scanning, you can just load a document in the scanner, press the scanner's

]Start button, and then PageManager opens EPSON TWAIN automatically. To use

this option, you must first install Presto! PageManager (or another application that

supports linking to scanner events with the Start button on Windows 98) and enable

the scanner monitor utility. For details on how to set up one-touch scanning, see

"Using the Start Button" in your EPSON TWAIN User's Guide.

You can use batch scanning to save time. Batch scanning lets you scan the same image

with several different settings. See "Batch Scanning" in your EPSON TWAIN User's

Guide for details.

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