How to Do Everything With Your Scanner- P13 pdf

How To…■ Decide which scanner features you’ll actually use ■ Find a scanner that matches your PC interface ■ Match the resolution of your scanner to your printer and monitor capabilities

This page intentionally left blank.

Selecting the Right Scanner

Chapter 3

Copyright 2001 by The McGraw-Hill Companies, Inc Click Here for Terms of Use.

How To…

■ Decide which scanner features you’ll actually use

■ Find a scanner that matches your PC interface

■ Match the resolution of your scanner to your printer and monitor capabilities

■ Shop on line for a good deal on a scanner

■ Test a scanner before you buy it Scanners can be like those exercise bikes with all the flashing lights monitoring your vital signs You can spend a lot of money on high-end features, with every intention

of putting them to good use, but their value lies in whether you actually give them a good workout, and how often The key to selecting a scanner is identifying the features you actually need for the types of projects you plan to do You want to purchase the greatest level and range of capability for the features you use, and avoid paying for those you don’t For example, if you don’t plan on scanning transparencies, you might

be better off skipping that capability and opting to spend more for a another feature, such as push-button email or better editing software

A Basic Shopping List of Scanner Features

Shopping for a scanner is a lot easier once you figure out what types of projects you plan on doing, and what features you need to accomplish them

A basic, good-quality scanning device might be the best use of your budget, particularly if your printer and graphics adapter card can’t take full advantage of the more sophisticated features available on some scanners.

Here’s a preliminary shopping list of features to commit to memory before setting foot in an office-equipment store or logging on to an online shopping site:

Interface The hardware interface of a scanner determines how it connects to your computer—what type of port and cable your scanner must have Most computers have parallel ports and USB ports Others might be configured for SCSI interfaces or the new FireWire The next section, “Pick the Right Port Connection,” tells you what all of these options are and how to figure out which one you need for your computer

Resolution Resolution is the capacity of a scanner to capture image detail You need dramatically different resolution capabilities, depending on the end product you’re planning to produce This chapter tells you which resolution is required for which types of projects (Chapter 2 covers the topic of resolution in depth.)

Bit depth This measurement tells you how well the scanner is able to discern between subtly different shades It’s covered in the “Deciding on the Right Bit Depth” section

Image sensors The more sophisticated a scanner’s sensor is, the higher the overall image quality will be—and the more expensive the scanner While a CIS sensor is less expensive, a CCD type is worth the additional cost The “What to Consider When You Compare Sensors” section tells you why

External buttons External buttons are the latest user convenience Previously, all scanners required that you operate them by opening your scanner’s software and executing commands through your mouse and keyboard Now, a new generation of scanners, such as the Visioneer One Touch series, allows you to initiate and even email a scan simply by pressing buttons on the scanner itself You never have to open and search for a command in a scanner application This is a clear upgrade

Scanner speed It’s hard to gauge the speed of a scanner, and there are few standard measurements available If speed is important to you, by all means avoid purchasing a three-pass scanner This type of scanner actually scans an image three times—one pass for each of the colors magenta, cyan, and yellow Opt for a one-pass scanner if you want to minimize your minutes per scan

Bundled software Comparison-shop the software that comes with a scanner In addition to the basic drivers that make the scanner work with your computer, scanners might come bundled with software that allows you to make corrections during a scan, image-editing software for after the scan, and optical character recognition (OCR) software that allows you to scan text and edit it using a word-processing program such as Microsoft Word or WordPerfect Chapter 2 tells you about the functions of all the different software that can come with a scanner

You might also want to do a bit of comparison-shopping to see which versions of a particular software are bundled Several scanners might offer the same bundled software, but some might offer later versions than others.

Film adapters Film and transparency adapters that allow you to scan negatives

You need special hardware for this because light must shine through the transparency

3

image to be captured The “Adding a Film Adapter” section gives you some tips on how to select one of these devices

Automatic sheet-feed device This handy gadget allows you to feed multiple sheets to your scanner the way you would a printer or copier Some high-end scanners can accept 100 sheets or more at a time, scanning images consecutively This is particularly useful for scanning long documents using OCR software

If you opt for a sheet-feed device, it’s crucial to get as much information

as is available about the speed of the scanner that comes with this feature Testing a model at your local office-equipment store might be the best way to speed-test a scanner.

Pick the Right Port Connection

Your PC and scanner each come equipped with connector sockets referred to as ports These ports enable hardware peripherals such as your scanner, printer, mouse, and keyboard to communicate with your computer via input/output cards Typically, a cable transfers the data between the ports on each of these devices

Depending on the age and price of your PC, it might be equipped with any of four different types of ports: parallel, USB, SCSI, and possibly even FireWire You want to select a scanner that gives you the fastest, most reliable connection, with the least hassle

to install Figure 3-1 shows an illustration of the rear view of a typical PC, having both parallel and USB connections

FIGURE 3-1 Most scanners offer both USB and parallel port connections.

USB port

Parallel port