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1、Scanning Photo Basics Lesson 1: Choosing a scanner Lesson 2: Installing your scanner Lesson 3: Calibrating your scanner Lesson 4: Editing your photos Lesson 5: Using special effects filters Lesson 6: Preparing your photos for email or the webLesson 1: Choosing a scannerExplore how a scanner works an
2、d what determines its quality.Welcome to Scanning Photos 101So you finally bought yourself a scanner and have big plans to scan treasured photos and share them with your friends and family online. What do you need to know? This course will get you up and running with your scanner and show you how to
3、 get the best quality results, plus tips on how to share your photos on the Web or over e-mail. Before we dig in, lets review how a scanner works. A scanner works by passing a bright light across an image. The light from that image reflects on rows of mirrors. The mirrors send the light to a charge-
4、coupled device (CCD), which converts the light to voltage. From there, the voltage is sent to an analog/digital converter, and then to your computer for storage and editing. The quality of the CCD determines the quality of the scanner. The CCD acts as the main gateway between the photograph on the s
5、canner bed, and the file stored on a computers hard drive. The image brightness, color depth, and clarity depend on the accuracy and number of sensors in the CCD (as well as the brightness of the scanner lamp). How to choose a scannerWhen it comes to judging specs, be sure to read the box carefully.
6、 Some manufacturers quote the interpolated resolution rather than the optical resolution. The former conjures up pixels where none exist, by mathematically approximating the pixel value based on its neighbors, while the latter figure represents the actual number of photo-sensitive sites on the senso
7、r. Optical density can also be a tricky spec. Its a measurement of the range of tonal values a scanner can capture, on a scale of 0 to 4.0; the closer to 4.0, the more detail youll see in the highlights and shadows. But theres no standard defining the scanner settings with which the measurements are
8、 taken, so we can take the manufacturers quote as only a rough approximation. The breadth and depth of scan controls, as well as the software bundle, can make a huge difference in your scan quality. For instance, to get the maximum tonal range, you should perform color and exposure adjustments at sc
9、an time whenever possible rather than during postprocessing-in Photoshop, for example-to minimize image degradation. Similarly, if you have a ton of photos to scan, you definitely need a driver with good batch-scanning capabilities and well-designed film holders. In addition to basic apps, most scan
10、ners come with some sort of additional software, even if its only a modest imaging program such as Adobe Photoshop Elements.Take some time to read about your scanner with this information in mind.Lesson 2: Installing your scannerExplore what needs to happen in order to access your scanner from your
11、computer.Installing your scanner for the first timeWhen you first hook up your scanner, you should follow the manufacturers installation instructions precisely, so that the scanners software drivers are loaded correctly. Note: Drivers are the organized routines that allow the scanner and computer to
12、 synchronously perform their related tasks. When you install your scanner software, these small files automatically load into the computer. Some software programs install the same driver; this causes older drivers to overwrite the newer versions. However, for your scanner to work, the computer must
13、have correct versions of all relevant drivers. Your scanner will come with a basic scanning utility program that will allow you to access and control the scanner so you can make setting changes and execute scans. This software displays the scanner image area and allows you to preview the image befor
14、e the scan finishes and gets saved to your hard drive. It will also allows you to adjust resolution and color depth. Note: If you have photo editing software installed on your computer, you may be able to access the scanner directly from within that software as well. This scanner control features us
15、ually appears when you select the Acquire option in the photo editing software. Scanning GuidelinesNow that youre ready to begin scanning, keep in mind the following guidelines:You can scan images bound for the Web or other computer applications such as PowerPoint slideshows or CD-ROM images at 72 d
16、pi. You can scan images bound for inkjet printers at 150 to 200 dpi. On the other hand, you can scan photographs that have a lot of flesh tones or details closer to the 200 dpi range. For professionally printed images, for a company brochure or poster, scan them according to the print houses requirements, between 300 and 1200dpi. All photographs should be scanned at the highest color mode possible. Look for a special s
