Wiley Photoshop CS3 For Dummies 978-0-470-11193-2 用户手册

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Part I: Breezing through Basic Training 
Exploring Adobe Photoshop
Photoshop is used for an incredible range of projects, from editing and cor-
recting digital photos to preparing images for magazines and newspapers to
creating graphics for the Web. You can also find Photoshop in the forensics
departments of law-enforcement agencies, scientific labs and research facili-
ties, and dental and medical offices, as well as in classrooms, offices, studios,
and homes around the world. As the Help Desk Director for the National
Association of Photoshop Professionals (NAPP), I solve problems and provide
solutions for Photoshop users from every corner of the computer graphics
field and from every corner of the world. People are doing some pretty amaz-
ing things with Photoshop, many of which are so far from the program’s 
original roots that it boggles the mind!
What Photoshop is designed to do
Adobe Photoshop is an image-editing program. It’s designed to help you edit
images — digital or digitized images, photographs, and otherwise. This is the
core purpose of Photoshop. Over the years, Photoshop has grown and devel-
oped, adding features that supplement its basic operations. But at its heart,
Photoshop is an image editor. At its most basic, Photoshop’s workflow goes
something like this: You take a picture, you edit the picture, and you print the
picture (as illustrated in Figure 1-1).
Figure 1-1:
Basic Photoshop: Take photo, edit photo, print photo. Drink coffee (optional).
Whether captured with a digital camera, scanned into the computer, or cre-
ated from scratch in Photoshop, your artwork consists of tiny squares of
color, which are picture elements called pixels. (Pixels and the nature of 
digital imaging are explored in depth in Chapter 2.) Photoshop is all about
changing and adjusting the colors of those pixels — collectively, in groups, or
one at a time — to make your artwork look precisely how you want it to look.
(Photoshop, by the way, has no Good Taste or Quality Art filter. It’s up to you
to decide what suits your artistic or personal vision and what meets your
professional requirements.) Some very common Photoshop image-editing tasks
are shown in Figure 1-2: namely, correcting red-eye and minimizing wrinkles
(both discussed in Chapter 9); and compositing images (see Chapter 10).
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