How to Do Everything With Your Scanner- P30 pptx

How To…■ Understand the differences between various file formats ■ Decide which format to use for sending images over the Web ■ Balance file size and image quality considerations ■ Recog

Formats for Saving and Storing Files

Chapter 8

How To…

■ Understand the differences between various file formats

■ Decide which format to use for sending images over the Web

■ Balance file size and image quality considerations

■ Recognize the benefits and effects of data compression Scanners might signal the beginning of the end of bulky photo albums, with loose and disorganized photos stuffed between their pages With digital imaging, storing and saving photos has taken a technological leap

Central to the issue of storing image data are file format considerations File formats that preserve a lot of data for high-quality images often take up impractical amounts of space on your hard drive They can also take forever to send over the Web This chapter helps you find a balance between the important considerations of image quality, storage space, and optimizing electronic-image transfers

Files Saved on Your Computer Have Different Formats

Each time you save a document or project on your computer, you’re saving it to a file One way to locate the image, text, or other data you’ve saved is to right-click the Start button on the Windows taskbar, then choose Explore to open Windows Explorer, as shown in Figure 8-1

When you look in the Explorer window, all the saved files look alike—identical yellow folder icons; however, if you access your files by clicking the My Computer icon on your desktop, you see something entirely different Instead of a column of folder icons, you see icons for shortcuts to documents in different applications For example, Figure 8-2 shows a window displaying icons in the Microsoft Word, Bitmap, WinZip, and other file formats

Programs Write Files in Their Native Formats

Files might look alike when you view them in your Explore window, but in reality they’re as different as the software that created them Every software program, or

application, stores files in its native format For example, a Microsoft Word document

creates a file with a native format that’s different from a WordPerfect document

FIGURE 8-1 Locating a file from the Windows Explorer window

FIGURE 8-2 Locating a file using the My Computer icon

WinZip format

Microsoft Word format

Bitmap format

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PhotoDeluxe writes files to its native PSD format PhotoSuite uses JPEG as its native file format

Different programs might have the same native format For example, several image-editing programs might use JPEG as their native.

Some formats are proprietary, which means you can open and use them only if

you have the particular type of software for which they were designed Other formats are extremely gregarious You can easily transfer them into other applications, or send them to your friends over the Internet and know that they’ll get along just fine with lots of other programs

Image-Editing Programs Support Different Formats

In addition to their native file formats, most image-editing programs, such as PhotoSuite and PhotoDeluxe, support a smorgasbord of file formats A particular image format, however, might have its own quirks and caveats A program, such as PhotoSuite or PhotoDeluxe, might allow you to view but not edit or save files in particular formats You might be able to perform some tasks, but not others, depending on what format you use to scan and save an image Table 8-1 summarizes the file formats supported by PhotoSuite and PhotoDeluxe PhotoSuite, for example, supports 18 different formats

File Format Extensions that Appear Can File Be Opened/ Can File Be Opened/

as Part of Filename Saved in PhotoSuite? Saved in PhotoDeluxe?

.jpeg, jpe, jog Y/Y Y/Y

Portable Network Graphic png Y/Y Y/Y Windows Bitmap bmp Y/Y Y/Y

Tagged Image File Format tif Y/Y Y/Y

TABLE 8-1 Common Graphics File Formats

CompuServe Graphics Interchange Format Joint Photographic Experts Group

File Format Extensions that Appear Can File Be Opened/ Can File Be Opened/

as Part of Filename Saved in PhotoSuite? Saved in PhotoDeluxe?

PC Paintbrush pcx Y/N N/N

TrueVision Targa tga Y/N N/N

Encapsulated PostScript eps Y/N Y/Y

Kodak Photo CD pcd Y/N N/N Adobe Photoshop psd Y/N Y/Y Windows Metafile wmf, emf Y/N Y/Y

Simple Format Changeables ica N/N Y/Y

TABLE 8-1 Common Graphics File Formats (continued)

Identifying Image File Types

You can tell which file you’re working with by looking at the filename A period and

three letters follow a file name Those three letters, called the file extension, are an

abbreviation for the type of file you’re working with For example, Figure 8-3 shows

a jpg and a gif file, both of which are among the common formats discussed in the next section

If you are unable to view file format extensions, an option might have been selected to hide them from view To reveal them, choose View | Folder Options | View | Advanced Settings, and click to deselect the checked option box beside “Hide file extensions for known file types.”

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