Computer Hardware Tutorials

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Scanning a Document Most scanners come with some kind of image-editing software such as Adobe Photoshop or Photoshop LE. Even if not, there are some excellent programs available for a relatively inexpensive price--some you can even download from the Internet, such as Paint Shop Pro or Graphics Workshop. If the program is TWAIN-compliant, its scanning features will work about the same no matter which program you choose. The main differences will come from the TWAIN driver supplied by your scanner's manufacturer. You'll want to review the program's documentation or check its online Help system to learn exactly how to use that particular program. Regardless of the program, the general tips and techniques that follow will help you produce better scans and get the most out of your image-editing software: 1. Always keep the glass on your flatbed scanner clean and free of smudges and fingerprints. Be sure to use special lens-cleaning cloths, not household tissues or paper towels--these can permanently scratch your scanner's glass. You can get lens-cleaning cloths at most computer or office supply stores. 2. If you have to move your flatbed scanner, make sure you lock the scanning head in place first. If you don't, it can become dislodged from its track and be costly to repair. If the locking mechanism isn't obvious, check the scanner's documentation for help. 3. Know the desired result before you scan. How will the image be used--for a letterhead? On a Web page? In a newsletter? Different jobs require different approaches, so plan ahead. 4. Use the lowest resolution possible that will still provide the quality you want. "Overscanning" only serves to make larger files and slower scans. 5. Scan photographs at about twice the resolution of the expected output. If you're not sure what that will be, ask your print shop. Magazines are traditionally printed at 133 lines per inch (lpi), so scan the photo at 266 dpi. 6. For line art images (hand-drawn artwork, mechanical drawings, and so on), always use the highest resolution possible. 7. Don't overscan an image if it's only going to a laser or inkjet printer. Laser printers generally output at about 50 or 100 lpi, so a simple 200 dpi scan will do just fine.