Photoshop cs5 by steve Johnson part 63 ppt

ptg
392 Chapter 16
After all your hard work, you now need to save your document. The
saving process involves selecting a specific file format, naming the file,
and choosing a destination. Choose a file name that will help identify
the document (looking in a folder of 100 images and seeing file names
such as image_a, image_b, really doesn't help). Select a destination,
such as a hard drive, removable media, or even a rewriteable CD or
DVD. Determine the format of the document file. While name and loca-
tion are important, the file format is crucial to the future of the image.
The file format determines how the document is stored, and what infor-
mation is saved with the file. Choosing the wrong format may even pre-
vent you from correctly outputting the file.
Saving a Document
with a Different File
Format
Save a Document with a
Different File Format
Open a document.
Click the File menu, and then click
Save As.
Enter a name in the File Name
(Win) or Save As (Mac) box.
Click the Format list arrow, and
then select a format.
See the table on the previous page
for assistance.
Click the Save In (Win) or Where
(Mac) list arrow, and then select a
location in which to save the
document file.

5
4
3
2
1
5
3
4
See Also
See “Understanding File Formats” on
page 391 for information on the differ-
ent file formats.
From the Library of Wow! eBook
ptg
Chapter 16 Controlling Image Output 393
Select from the following Save
options:
◆ As a Copy. Select the check
box to save a copy of the file,
while leaving the original open.
◆ Alpha Channels. Select the
check box to save any alpha
channel information.
◆ Layers. Select the check box to
preserve all layers within the
document.
◆ Notes. Select the check box to
save any note annotations with
the document.
◆ Spot Colors. Select the check

box to save any spot channel
information.
Select from the following Color
options:
◆ Use Proof Setup.
Select the check box to create
a color-managed document.
◆ Embed Color Profile (Mac).
Select the check box to create
a color-managed Macintosh
document.
◆ ICC Profile (Win). Select the
check box to create a color-
managed Windows document.
Click Save.
8
7
6
6
7
8
Organizing Documents
Organization is a big part of any Photoshop project. For example, you
might be working on several images, along with a dozen supporting
images and text. When you work on a project, create a project-
specific folder and save all the different files you need for that proj-
ect in the same folder. That way everything is in one place, so it's
easy to access, easy to move, and easy to store.
For Your Information
From the Library of Wow! eBook

ptg
394 Chapter 16
When you save a document, you have the ability to save more than just
color information. You can save copyright, camera, and even image
category information. This data is saved with the file as metadata in the
XMP format (Extensible Metadata Platform), and can be accessed by
any application that reads XMP data. In addition, if the image is a pho-
tograph, you can save data specifying the type of image, where it was
shot, or the camera used. You can even get information on shutter
speed and f-stop. That information will not only protect your intellectual
property, but will supply you with vital statistics on exactly how you
created that one-of-a-kind image.
Inserting File
Information into
a Document
Insert File Information into
a Document
Open a document.
Click the File menu, and then click
File Info.
TIMESAVER
Press
Alt+Shift+Ctrl+I (Win) or
Option+Shift+
A
+I (Mac).
Click Description, and then enter
information concerning the author
and any copyright information.
Click Camera Data, which reveals

information about the camera that
took the image.
These are read-only fields and
include information such as
camera model, ISO, aperture,
metering, shutter speed, and pixel
dimensions.
Click History to view historical
information about the active
document, such as dates last
opened and saved, and a list of
adjustments performed on the
image.
Click IPTC, and then IPTC Contact,
IPTC Image, IPTC Content, and
IPTC Status to enter information
concerning the image's creator,
description and keywords, location
where photograph was taken, date
created, copyright, and usage
terms.
6
5
4
3
2
1
3
4
5

From the Library of Wow! eBook
ptg
Chapter 16 Controlling Image Output 395
Click Origin, and then enter data
pertaining to the origin of the
image.
Click Advanced to view
additional information on the
active document, such as EXIF,
and PDF document properties.
Click OK.
9
8
7
6
7
9
Did You Know?
You can add metadata to files saved in
the PSD, PDF, EPS, PNG, GIF, JPEG,
and TIFF formats.
The information is
embedded in the file using XMP
(Extensible Metadata Platform). This
allows metadata to be exchanged
between Adobe applications and
across operating systems.
You can use the XMP Software
Development Kit to customize the
creation, processing, and interchange

of metadata.
You can also use the XMP
kit to add fields to the File Info dialog
box. For information on XMP and the
XMP SDK, check the Adobe Solutions
Network.
8
From the Library of Wow! eBook
ptg
396 Chapter 16
Compression is Photoshop's way of reducing
the size of a document file, kind of like the
ultimate weight-loss program. Just click a
button, and the file can be reduced to half its
original size. Photoshop employs two types of
compression schemes: lossy and lossless.
Lossy
compression reduces the size of the file
by removing color information—information
that can never be restored to the saved docu-
ment. Lossy compression schemes can
achieve file reductions of 80% or greater.
The
Lossless
method reduces file size by
using compression algorithms that reduce the
size of a file without removing image informa-
tion. Lossy methods are used primarily for
images displayed in browsers (images for the
Web). The relatively slow speed of the Internet

forces web designers to employ lossy com-
pression methods to reduce images down to
their smallest values. Lossless methods are
used when the reduction of a file is important,
but not so much that you would consider
removing information. For example, you
might want to reduce the size of a group of
high-quality TIFF images so they fit on a
rewriteable CD. Lossless compression meth-
ods can reduce files sizes up to 50%, or even
a bit more.
Both methods compress documents based
on the actual image information. For example,
images that contain a lot of solid color infor-
mation would compress quite well using the
GIF (Graphics Interchange Format) or PNG-8
formats, whereas an image with a lot of con-
tinuous tone colors, such as a photograph,
would be best compressed using the JPEG
(Joint Photographic Experts Group) format.
Understanding File Compression
Lossy
Lossless
From the Library of Wow! eBook
ptg
Chapter 16 Controlling Image Output 397
Format Compression Output Use
JPEG Lossy Web/Slide Presentations. PDFs, photographs, and
images that contain lots of colors that softly blend
together.

GIF Lossless Web. Clip art, text, and any images that contain solid
colors and images with hard edges.
PNG-8 Lossless Web. Clip art, text, and any images that contain solid
colors and images with hard edges.
PNG-24 Lossless Web/Slide Presentations/PDF/Print. Photographs and
images that contain lots of colors that softly blend
together. Because the PNG-24 format is lossless, it can
not compress images as small as the JPEG format.
Therefore, the JPEG format is still the format of choice
for compressing images for the Web.
ZIP Lossless Used on all image types for image storage and transfer.
The Zip compression application lets you compress
images without affecting image quality. To open a Zip
image, you must have the Unzip application.
LZW Lossless Used primarily on TIFF images for image storage and
transfer. The LZW compression scheme lets you com-
press images without affecting image quality. To open
an LZW image, the opening application must have the
proper LZW decompress utility.
Format Type, Compression Type, and Output Uses
From the Library of Wow! eBook
ptg
398 Chapter 16
Clip art is defined as non-photographic image information, with a lot of
solid-color areas. When saving this type of file, the GIF or PNG-8
formats would work best. The GIF (Graphics Interchange Format) and
PNG (Portable Network Graphics) formats use an RLE (Run Length
Encoding) scheme. When the file is saved, areas of solid color are
compressed into small units and then restored to the file when it is
opened. The GIF format supports a maximum of 256 colors. While that

may not seem like much, most GIF images, such as clip art and text,
contain far less color information. By reducing the number of colors
available for the GIF color table, you can significantly reduce the
image's file size. For example, a GIF image composed of black text
might only require a maximum of 2 colors (black and white). Experiment
with the GIF Colors option to produce small, fast-loading image files.
Since the GIF format has been around for a long time, using it almost
guarantees that the image will open on a visitor's browser. The PNG
format is newer, and has some new encoding schemes that make even
smaller files, but it is not supported by all web browsers.
Preparing Clip Art
for the Web
Prepare Clip Art for the Web
Open a clip art document.
Click the File menu, and then click
Save As.
Enter a name for the file in the
Save As box.
Click the Save In (Win) or Where
(Mac) list arrow, and then select a
location in which to save the file.
Click the Format list arrow, and
then click CompuServe GIF.
Click Save.
6
5
4
3
2
1

4
3
5
6
From the Library of Wow! eBook
ptg
Chapter 16 Controlling Image Output 399
Select from the following Indexed
Color options:
◆ Palette. Click the list arrow, and
then select from the available
color palette options, including
Web (Safe), Mac, and Win
System panels.
◆ Colors. If you selected a local
color, or custom panel, click to
select the number of colors
saved with the image. The
maximum number of colors
is 256.
◆ Forced. Click the list arrow, and
then select what colors will be
retained in the image.
◆ Transparency. Select the check
box to preserve any transparent
areas.
◆ Matte. If the image contains
transparent areas, clicking this
list arrow lets you select a color
to fill the areas. For example,

you could fill all transparent
areas of the image with black to
match the black background of
a Web document.
◆ Dither. Click the list arrow, and
then select how you want the
remaining image’s color to mix.
◆ Amount. Enter an Amount
percentage to instruct the GIF
format how aggressively to
dither the image colors.
◆ Preserve Exact Colors. Select
the check box to force the
preservation of the original
image colors (based on how
many colors were chosen using
the Palette option).
Click OK.
8
7
8
7
From the Library of Wow! eBook