Tài liệu Photoshop cs5 by Dayley part 1 pps

Part IGetting Started with Adobe Photoshop CS5 IN THIS PART Chapter 1 Introducing Adobe Photoshop CS5 Chapter 2 Understanding the Photoshop Workspace Chapter 3 Image Basics Chapter 4 U

Part I

Getting Started

with Adobe Photoshop CS5

IN THIS PART

Chapter 1

Introducing Adobe Photoshop CS5

Chapter 2

Understanding the Photoshop Workspace

Chapter 3

Image Basics

Chapter 4

Understanding Colors, Histograms, Levels, and Curves

Chapter 5

History and Actions

Chapter 6

Using Bridge to Organize and Process Photos

C H A P T E R

Introducing Adobe

Photoshop CS5

IN THIS CHAPTER

Brief introduction to Photoshop CS5 Reasons to use Photoshop CS5 New features introduced in Photoshop CS5

If you are reading this book, you likely have access to one of the most

complicated and complex software applications available Don’t let that

discourage you though Photoshop is also a powerful and extremely fun

application to use Photoshop has throngs of fans all over the globe Over the

years, Photoshop has become the pinnacle software application for image

editing In fact, if you look up Photoshop at wiktionary.org, you find the

term photoshop is actually a verb meaning “to digitally alter a picture or

photograph.”

Photoshop draws such a big crowd because it provides amazing results when

you are editing images and yet is fairly intuitive to use such that even casual

users can get pretty good results without much effort Also, as digital

imag-ing has advanced over the years, Photoshop has kept pace and even led the

advancements in many areas

The purpose of this chapter is to give you a brief introduction to Adobe

Photoshop CS5, when to use it, and what new features have been added

since CS4 Chapter 2 dives into the nuts and bolts of Photoshop’s

application workspace

The Versatile World of Photoshop

The simplest description of Photoshop is “a digital image-editing

applica-tion.” That description doesn’t come close to Photoshop’s capabilities

Photoshop provides the standard color and lighting correction capabilities

historically associated with photo editing, but it also provides filtering,

paint-ing, maskpaint-ing, layerpaint-ing, and many more tools that allow you to take image

editing to the next level

Photoshop comes in two versions The standard Photoshop edition provides all the functionality you need to create, enhance, and correct digital images The extended edition, which costs more, provides additional functionality to work with 3D objects, video, and digital animation The extended edition is worth the money if you are working with 3D objects or need to add color/

lighting corrections and artistic effects to video If you are not working with 3D objects or video, the standard edition is all you need

The following sections discuss the uses of Photoshop as well as a few times where you need to use additional applications with Photoshop The purpose of the section is to give you a glimpse

of what Photoshop is for before diving into using it Of course, the only real way to understand Photoshop’s capabilities is to delve into them as you follow along with the next 30 chapters in this book

When to use Photoshop

Photoshop has so many tools and so much power that it can do an almost unlimited number of things The following list describes the most common tasks that Photoshop is used for to help you get an idea of when to use it:

l Photo corrections: Photoshop’s strength lies in the ability to correct digital images to

restore the original color and lighting as well as to correct problems introduced by camera lenses These features of Photoshop are covered in Chapter 13

l Photo enhancements: Photoshop also provides tools that allow you to enhance photos

For example, you can add a blur to soften a portrait or use a sharpening filter to remove motion blur Photoshop also is great at fixing scratches and dust marks on older images

These concepts are discussed in Chapters 14 and 15

l Photo compositions: One of Photoshop’s strengths is the ability to combine multiple

images to create a single image or composition A common use of Photoshop is to take a headshot from one image and place it into another Photoshop also allows you to merge several photos that were taken at different horizontal angles from the same spot and turn them into a single panoramic image Photo compositions are discussed in Chapter 21

l Artistic effects: One of the most fun features of Photoshop is the ability to use different

filters and warping tools to apply artistic effects to images The combination of numerous tools and filters in Photoshop means that the only limitation you have with adding artistic effects is your own creativity The tools used for artistic effects are covered in Chapters

19 and 20

l Painting: Photoshop has always been a fairly good painting application, but with the

addition of the wet brush capability in CS5, Photoshop is now one of the best applications available to create digital painting What puts Photoshop ahead of the competition is that many of the powerful features, such as the layers and masks, also are available for use with the painting tools Also, the painting brushes are integrated into many of the other tools in Photoshop Chapter 16 discusses the painting tools

Chapter 1: Introducing Adobe Photoshop CS5

l Creating vector artwork: Photoshop also is an excellent application to use when creating

vector artwork The path tools allow you to quickly create and manipulate vector artwork

You also can add vector artwork to raster images Vector artwork, including vector text, is discussed in Chapters 17 and 18

l Adding text to images: Photoshop provides tools that allow you to add text to images

The text can be resized, warped, and adjusted to provide some stunning visual effects to images Chapter 18 discusses adding textual elements to images

l Creating Web images: Another area where Photoshop excels is preparing images for the

Web Photoshop provides utilities that allow you to quickly format images with the appro-priate size, file format, and colors for use in Web pages Photoshop also provides some tools you can use to slice an image into clickable sections and provides the HTML code necessary to utilize the slices in a Web page Outputting to the Web is discussed in Chapter 30

l Print preparation: Photoshop often is used to prepare images for printing by converting

the color mode to CYMK, adding spot colors, and creating color separations These topics are covered in Chapters 11 and 29

l Creating 3D objects: Photoshop has the capability to create and manipulate 3D objects

Although it is not the best utility for creating 3D objects, it is very good at manipulating them and then applying them to 2D images The 3D capabilities of Photoshop are covered

in Chapters 22, 23, and 24

l Adding textures to 3D objects: Photoshop has a big advantage over other 3D

applica-tions at applying textures to 3D objects With Photoshop’s filter and painting capabilities, you can edit the textures of your 3D objects in ways that you may not have thought possi-ble Chapter 23 discusses creating and enhancing 3D textures

l Video corrections: Just as with 3D modeling, Photoshop should not be your choice for

creating video projects; however, using Photoshop’s color, lighting, and filter effects, you can quickly apply corrections to video and even add some artistic effects Chapter 27 dis-cusses applying corrections and effects to video files

l Animating images: Another fun feature of Photoshop is the ability to add animation to

your images Animated images can give life to Web pages and allow you to create short animated movies Chapter 28 discusses animating images

When not to use Photoshop

Believe it or not, Photoshop is not designed to do everything, and you should use a different appli-cation for those tasks after you have created/adjusted the image in Photoshop For example, use another program for the following:

l Word processing: Most word processing applications allow you to add images to

docu-ments created with those programs, and although Photoshop supports adding text to images, it doesn’t support text editing all that well and can’t handle text flowing from one page to another You should use Photoshop to work with the images and then import them into the word processor

l Business graphics: Photoshop doesn’t do charts and presentations very well, but you can

create great images in Photoshop and then use them in business applications

l Page layout: Applications such as Adobe InDesign are much better adept at laying out

most brochures, flyers, and documents that are mostly textual You should create the images in Photoshop and then import them into the layout application

l Vector art: Although Photoshop has a lot of capability when it comes to creating vector

paths, Illustrator is much better application for working with clipart and designing adver-tisements, flyers, and one-page layouts that have multiple vector objects

What’s New in Photoshop CS5

Adobe has added several great new features to Photoshop CS5 that make tools easier to use, extend capabilities, and add lots of justification for upgrading These new changes are discussed through-out the book The purpose of this section is to describe the biggest changes and let you know where in the book you can find more information about them:

l Sticky Workspaces: The workspaces in Photoshop now save themselves when you switch

between them That way, your panels and other settings stay the same way you left them when you come back Photoshop also provides a reset option to reset the workspace to the default See Chapter 2

l Workspace Switcher: Adobe has modified the method to switch between workspaces

with a new option in the application bar that allows you to access workspaces more easily

See Chapter 2

l Mixer Brush: One of the coolest features in Photoshop CS5 is the addition of the Mixer

Brush to the painting tools The Mixer Brush mixes colors in the brush and on the canvas

as you apply strokes to the document, allowing you to create realistic painting effects This one new feature makes Photoshop CS5 worth the upgrade Chapter 16 covers the Mixer Brush in detail Figure 1.1 shows an example of using the Mixer Brush to add brush strokes to a photograph to create a paint effect Notice that by using the Mixer Brush, the colors in the image have been spread like brush strokes

l Bristle Brushes: Another feature that adds to the painting functionality in Photoshop is

the addition of realistic paint brushes The new Bristle Brush tips allow you to define paint stroke behavior that mimics real paint brushes by allowing you to define the number of bristles, stiffness, shape, and other behaviors that simulate real-life brushes Combined with the Mixer Brush tool, the Bristle Brushes elevate Photoshop CS5 to one of the pre-mier digital art applications See Chapter 16 Figure 1.2 shows the various new Bristle Brushes

Chapter 1: Introducing Adobe Photoshop CS5

FIGURE 1.1

The new Mixer Brush allows you to treat the pixels in an image like wet paint as you apply brush strokes, significantly increasing Photoshop’s ability as a painting application

FIGURE 1.2

The new Bristle Brushes allow you to define bristle length, shape, stiffness, and behav-ior, providing realistic brush effects

l Bristle Brush Preview: The new Bristle Brushes also come with a preview window that

simulates the movement and pressure of the brush as you apply brush strokes As you put more pressure on the brush, the preview shows the bristles as they fan out The preview is especially useful if you are using a stylus that supports tilt and pressure, because the pre-view shows you the behavior of the brush when it is tilted and as you apply more pres-sure Figure 1.3 shows some examples of the Bristle Brush preview window

FIGURE 1.3

The Bristle Brush preview window displays the behavior of the brush in real time as you make brush strokes, including the tilt of the brush and how the bristles fan out with more pressure

l Mini Bridge: A new Mini Bridge panel has been added to Photoshop The Mini Bridge

panel allows you to quickly find and open files in Photoshop using Navigation and Content panes similar to those in Bridge You no longer need to switch between Photoshop and Bridge to find files See Chapter 6 Figure 1.4 shows the look of the Content and Navigation panes in the Mini Bridge panel

Chapter 1: Introducing Adobe Photoshop CS5

FIGURE 1.4

The Mini Bridge panel provides a simple interface you can use to more easily find and open files in Photoshop

l Puppet Warp tool: The Puppet Warp tool is another fun feature in Photoshop CS5 Using

the Puppet Warp tool, you can lock pieces of the image to remain static and then adjust points in the no static sections As you adjust the points, the image is warped as if you were pulling on a piece of cloth The result is that you can take an object such as a person and warp only the arms or legs as you would a puppet See Chapter 19 Figure 1.5 shows

an example of using the Puppet Warp tool to change the position of a spider’s legs Notice how the locking pins hold the rest of the image in place while the spider’s legs are warped

FIGURE 1.5

The Puppet Warp tool allows you to warp and change the position of specific areas of the image without affecting the rest of the pixels

l Content-Aware Fill and Spot Healing: Adobe has enhanced the Spot Healing Brush tool

so you can enable the Content-Aware feature This feature takes into account the pixels in the area being healed and tries to match other similar patterns in the image You also can create a Content Aware Fill that replaces a selection with a content aware patch The result

is that you can quickly remove content from an image without the anomalies that you used to get It’s a situation of “now you see it, now you don’t.” See Chapter 15 Figure 1.6 shows an example of removing an elk from an image using the Content-Aware Spot Healing

Using the Content-Aware Spot Healing feature, you can simply paint loosely over an object and Photoshop does the rest Notice how cleanly the animal is removed and replaced with grass similar to the content around it

Chapter 1: Introducing Adobe Photoshop CS5

FIGURE 1.6

The Content-Aware Spot Healing feature allows you to easily use painting strokes to remove elements from an image and replace them with content similar to the content around where the object was located

l Repoussé: Another major advancement in Photoshop CS5 is the addition of the Repoussé

tool Repoussé allows you to take a 2D vector path and turn it into a 3D vector object

This is a huge bonus to the extended edition, because you can now create a variety of 3D shapes by utilizing vector paths A great use of the Repoussé tool is to create 3D text art from vector text layers Repoussé is covered in detail in Chapter 22 Figure 1.7 shows the Repoussé tool along with an example of turning 2D text into a 3D object