photoshop CS2 essential skills phần 9 ppt

the new shape to modify an existing shape, select the ‘Vector mask thumbnail’ in the layers palette and one of the options to the right of the ‘Create new shape layer’ icon in the Option

the new shape to modify an existing shape, select the ‘Vector mask thumbnail’ in the layers palette and one of the options to the right of the ‘Create new shape layer’ icon in the Options bar.

Defi ning a new custom shape

When a vector shape is completed it can be

saved or archived as a ‘Custom Shape’ for future

use To create a custom shape drag the ‘Path

Selection Tool’ or ‘Direct Selection Tool’ over

the entire vector shape to select all points, and

then from the Edit menu select ‘Defi ne Custom

Shape’

Creating a simple vector logo

Photographers displaying and distributing images to clients over the Internet are wise to protect their images By adding a small identifying logo to images or by adding a larger reduced opacity watermark over the entire image it makes the image more diffi cult to appropriate The easiest and fastest way to apply either of these identifying graphics is to store the logo in Photoshop itself rather than as a separate image fi le Photoshop can store the logo as a ‘vector’ shape that is

‘resolution-independent’ (it can be drawn any size without becoming pixellated)

Photoshop is shipped with a small assortment of pre-drawn vector shapes called ‘Custom Shapes’ Any vector shape created can be stored as a ‘Custom Shape’ adding your own shapes

to Photoshop’s selection – hence the name ‘Custom Shapes’

ACTIVITY 2

In this activity you will create a custom shape from a simple combination of vector shapes and

a letter As you become confi dent with the tools you can begin to get more elaborate – but remember, the logos of the very powerful companies tend to be very simple

1 Start by going to File > New File to create an empty canvas that is 320 × 320 pixels with a resolution of 160ppi (a precise size and resolution is not important at this stage as a vector logo can be scaled later for the required output device without a problem) The resolution and pixel dimensions suggested create a fi le output size of 2 × 2 inches The fi le can be resized later to create a larger graphic without any risk of pixellating because of the very nature of vector shapes that are ‘resolution-independent’ (not described by pixels)

the illustration The guides will help you create a

symmetrical and uniform logo To create guides

go to the ‘View’ menu and select Show Rulers

Check the rulers are set to pixels If they are not

set to pixels you can quickly reset them by going

to Edit > Preferences > Units & Rulers

Click on a vertical or horizontal ruler and drag a

guide into the image area using the ruler to guide

you The guides for this activity were placed in

the following positions:

~ 20, 60 and 85 pixels from each side

~ 160 pixel center position

~ 40 and 60 pixels from the top

~ 60 and 80 pixels from the bottom

3 Select the Type tool and type the letter ‘M’ in the center of the new canvas (in the illustration the font Arial Bold 72 pt was used)

Note > You can use any letter or letters to personalize the logo.

The background in the illustration was fi lled with a light gray The 1-pixel wide white lines were drawn over a grid and then blurred a little using the ‘Gaussian Blur’ fi lter This background does not form part of the logo

4 Select the type layer and go to Layer > Type > Convert to Shape

5 From the Edit menu select ‘Defi ne Custom

Shape’ Name the shape layer The shape is

stored in the ‘Custom Shapes’ and will be used

later in the activity

6 Delete the shape layer (the letter ‘M’) by

dragging the layer to the trash in the layers

palette

7 Select the ‘Ellipse Tool’ (residing behind the

‘Rectangle Tool’) in the tools palette or on the

‘Options bar’

8 Starting in the top left-hand corner (where the

guides intersect) click and drag the cross hair to

the intersection of the guides in the bottom

right-hand corner of the canvas area

Now select the ‘Subtract from shape area’ icon

in the Options bar and drag a second smaller

ellipse that will cut out or subtract from the original

ellipse Use the guides to locate the starting and

fi nishing points

9 Select the ‘Add to shape area’ icon and

your custom shape from the palette Move the

mouse cursor to your ellipse and add the custom

shape (click and drag the mouse) If you need to

resize the letter you can use the Free Transform

command from the Edit menu If you need to

move the letter select the shape using the ‘Path

Selection Tool’ (black arrow) and then click and

drag the letter to a more suitable position

or more of these paths The Direct Selection Tool (white arrow) can be used to select an individual anchor point on any of the paths to adjust the path’s shape

The ‘active’ adjustment point will be highlighted when selected and can be moved by dragging the point or using the arrow keys on the keyboard Adjust the inner ellipse so that the width is even

by selecting each of the side anchor points in turn and then tapping the left or right arrow key on your keyboard

Note > Each anchor point that is selected will display one or two ‘direction lines’ that end

in ‘direction points’ These can be moved

to change the shape and size of the curve between the two anchor points.

11 When all adjustments to your logo are complete ensure the vector thumbnail is selected and select ‘Defi ne Custom Shape’ from the Edit menu again to add the combined shape to the custom shapes menu It is now possible to throw away all the layers then select the custom shape from the custom shapes palette and draw another

Note > Custom shapes can be saved as a shapes fi le The shapes fi le can be loaded into another copy of Photoshop on a different computer by clicking on ‘Load Shapes’ and browsing to the shapes fi le to be uploaded

Alternative ways of acquiring a shape

An alternative to creating your shape in Photoshop is to import a vector shape from Adobe Illustrator or by scanning a piece of artwork (a shape that exists on a piece of paper) using a

fl atbed scanner

When Adobe Photoshop opens an Adobe Illustrator fi le it asks for the fi le to be assigned a size and resolution so that it can be ‘rasterized’ (converted to pixels) To protect the vector properties of the shape the fi le should fi rst be opened in Illustrator, the path or paths selected and then copied to the clipboard (Edit > Copy) The vector fi le can then be pasted (Edit > Paste) as a vector shape

in an open Photoshop fi le

If a shape has been scanned and opened as a ‘bitmap’ fi le (a fi le constructed from pixels) in Photoshop you must fi rst make a selection of the shape With the selection active go to the ‘paths’ palette and from the palette options select ‘Make Work Path’ Select this path with the ‘Path Selection Tool’ and then proceed to the ‘Edit’ menu to save this active path as your custom shape

Layer styles

After dragging a logo to suit your needs the

custom shape can then be quickly assigned a

layer style A layer style is a series of layer effect

settings that has been saved (as a style) and can

be a combination of layer effects such as ‘Drop

Shadow’ and ‘Bevel and Emboss’ To apply a

layer style, click on the shape layer and then click

on a style from the ‘styles’ palette

12 To create the ‘Blue Glass’ effect start with

the one that comes shipped with Photoshop

by clicking on the style with your shape layer

selected

Note > Unlike the vector logo the styles

are resolution dependent The effects are

described in pixels, e.g a 3-pixel bevel,

etc A layer style that is suited to a

high-resolution graphic will not be suitable for

a low-resolution graphic destined for the

Internet Photoshop offers the option of

scaling all of the layer effects at the same

time In this way a layer style that is suited

for use with a high-resolution image can be

quickly scaled to one suited for an image with

a lower resolution.

Specifi cations for the Drop Shadow

Colour

Hue: 210 Saturation: 80 Brightness: 55

Structure

Blend: Multiply Opacity: 70% Angle: 90º

Distance: 16 px Spread: 0% Size: 14 px

Quality

Contour: Linear Noise: 0%

Specifi cations for the ‘Outer Glow’

Saving your style

15 With the graphics layer selected click on

‘New Style’ in the styles palette to add the

modifi ed style You may choose to add the

image resolution to the name of the style Just

as with the shape the style can be saved as a

styles fi le

Scaling your logo

If the logo is destined for the Internet the fi le

should be scaled using the Image Size dialog

box (go to Image > Image Size) Make sure the

‘Resample Image’ box is checked and drop the

resolution until the pixel dimensions required are

achieved Check the Scale Styles to preserve

the appearance of the styles used in preparing

the graphic

Note > Once scaled you can ‘jump’ the fi le

into ImageReady to optimize or animate the

fi le by clicking on the ‘Jump’ icon at the base

of the tools palette.

The logo with personalized style and used at a reduced opacity to act as a watermark

Creating an animated graphic for the web

We can use Adobe ImageReady, the companion software to Photoshop, to animate and optimize images destined for the ‘World Wide Web’ If our animation plans include rotating a graphic in space we should fi rst make some different viewpoints in Photoshop before jumping the multi-layered fi le into ImageReady, as the vector tools are not replicated in ImageReady

Photoshop is not really designed as a cutting-edge 3D rendering program, but it is quite capable

of creating a few alternative viewpoints of an image by using the Transform command Although capable of rendering a graphic to appear three-dimensional, Photoshop has no way of knowing or understanding the depth of the two-dimensional graphics that are created using the vector tools The process of rendering alternative viewpoints in Photoshop is only a semi-automated feature, as

we must instruct Photoshop how the graphic will look as it is turned in space

ACTIVITY 3

1 Start with the full size graphic created for

‘Activity 2’ Add some additional guides to the

canvas area, 20 pixels from the top and 40 pixels

from the bottom Drag the layer with the vector

logo to the New Layer icon in the layers palette

to duplicate the layer

2 Using the command ‘Edit > Transform >

Perspective’ drag the corner handles to increase

the height on the left-hand side and reduce the

height on the right-hand side By dragging the

side handles of the bounding box, the width of

the graphic can be reduced Press the ‘return/

enter’ key to apply the transformation

made wider by clicking on the inner ellipse and then dragging (or by using the arrow keys on the keyboard) the anchor point to a new position.

4 Duplicate this modifi ed layer in the layers

palette before proceeding to alter the perspective

a second time The existing guides will help you

to reposition the bounding box when using the

Transform command

Note > It is important to ensure the top of the

ellipse remains in the same position as you

create additional views of the logo, if the logo

is later to appear to be spinning on the spot

(use the intersection point of two guides to

help you).

5 It will be necessary to create a new shape layer for the side view rather than modify an existing layer Use the ‘Rounded Rectangle Tool’ to draw a bar between the top and bottom guides Alter the radius in the Options bar to obtain an appropriate end shape to this bar A radius of 40 pixels was used in the example

shapes layer by dragging the layer effects from

an existing layer to the new layer Open the layer effects on an existing layer with the required style and click and drag the word ‘effects’ to the new layer After completing the side view the logo has turned through 90˚ Duplicating and ‘fl ipping’ your existing layers can create the viewpoints of the remaining 270˚

7 To create the additional views to complete the 360˚ rotation duplicate a pre-existing layer and

fl ip the logo if required

Note > To fl ip a vector shape select all the paths using the Path Selection tool and then

go to Edit > Transform Path > Flip Horizontal.

8 Your layers palette should look like the one opposite when you have completed a 180˚ turn

Note > As the demonstration graphic is symmetrical there is no need to create additional viewpoints.

9 Save the fi le as a PSD fi le Before jumping a Photoshop fi le with layer effects into ImageReady, scale the image in the ‘Image Size’ dialog box using the resolution control to alter the pixel dimensions

Combined use of fi lters and styles

Vector graphics can be integrated into the image using a variety of skills and techniques Layer styles can be used together with Displace and Liquify fi lters to embed a logo into a photographic background With a little skill and knowledge three dimensional graphics can be created and rendered from scratch in Photoshop without a requirement for any drawing skills

ACTIVITY 4

1 Create a new RGB fi le 5 inches square with a resolution of 300ppi

2 Set the foreground color to black and choose a desaturated color for the background (click on the background color to launch the ‘Color Picker’)

3 From the ‘Filter’ menu choose ‘Render > Clouds’

4 From the channels palette click on the ‘Create

new channel’ icon at the base of the palette The

new channel should appear fi lled with black

5 From the ‘Filter’ menu choose ‘Render > Difference Clouds’

6 Click on the master RGB channel and return

to the background layer in the layers palette

From the ‘Filter’ menu choose ‘Render > Lighting

Effects’ From the ‘Texture Channel’ menu

choose your ‘Alpha 1’ channel and move the

slider to ‘Mountainous’

8 From the ‘Duplicate Channel’ dialog box select

‘New’ from the ‘Document’ menu and select OK

Save the new fi le as your image map to your

desktop or project folder This will act as the

displacement map to distort the logo to follow the

contours of the background

9 Open a vector logo fi le that you have created

for an earlier activity Drag the vector logo

thumbnail over to the background image to create

a multi-layered fi le Discard any layer styles you

may already have

11 Add a Bevel and Emboss, Inner Shadow and

Color overlay layer styles to one of the two vector

layers Choose black for the Color Overlay

Choose ‘Outer Bevel’ and ‘Chisel Hard’ for the

‘Style’ and ‘Technique’ options in the Bevel and

Emboss layer style dialog box

12 Reduce the ‘Fill’ opacity to reveal the underlying surface The black ‘Color Overlay’ will serve

to darken the bottom of the trench slightly

13 Apply an Overlay blend mode to the logo copy layer and reduce the fi ll opacity to 50% Apply a Bevel and Emboss layer style to this layer To create the illusion of water fi lling the trench select a

‘Gloss Contour’ Switch off the ‘Global Light’ and position the light source just above center Some

fi ne-tuning will be required to move the refl ection over the surface of the water

Note > Experiment with grouping an image to the top layer at a reduced opacity to create the illusion of a refl ected image.

images for the web

~ Create an animation for the web using Adobe ImageReady

~ Create a web page usingslices, rollovers, links and optimization in Adobe ImageReady

essential skills

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