Page 17 - CC2017_PS_Look_Inside

Effective resolution can be a very important consideration when working with
client-supplied images, especially those that come from consumer-level digital cameras.
Many of those devices capture images with a specific number of pixels rather than
a number of pixels per inch (ppi). In this exercise, you will explore the effective
resolution of an image to see if it can be used for a full-page printed magazine ad.

1. Download Movie_PSCC17_RF.zip from the Student Files Web page.

2. Expand the ZIP archive in your WIP folder (Macintosh) or copy the archive
contents into your WIP folder (Windows).
This results in a folder named Movie, which contains all of the files you need for this Note:
project. You should also use this folder to save the files you create in this project.
We are intentionally
If necessary, refer to Page 1 of the Interface chapter for specific information on overlooking issues of
expanding or accessing the required resource files. color space for the sake
of this project. You will
3. Choose File>Open and navigate to your WIP>Movie folder. learn about color spaces
Select Bricks.jpg and click Open. and color management
in Project 3: Museum
4. If the rulers are not visible on the top and left edges, choose View>Rulers. Image Correction.
As you can see in the rulers, this image has a very large physical size.
Note:

Although designers
Rulers display values
in the default units trained in traditional
of measurement. (non-digital) methods are
sometimes comfortable
talking about picas or
ciceros, most people use
inches as the standard
unit of measurement in
5. Choose Image>Image Size. the U.S.

The Image Size dialog box shows the number of pixels in the image, as well as the image You can change the
dimensions and current resolution. You can change any value in this dialog box, but you default unit of measure-
should understand what those changes mean before you do so. ment in the Units &

As you can see, this image is currently 37.5 inches wide and 50 inches high, but it Rulers pane of the
was photographed at 72 pixels/inch. For most commercial printing, you need at least Preferences dialog box.
300 ppi. You can use the principle of effective resolution to change the file to a high Double-clicking either
enough resolution for printing. ruler opens the appropri-
ate pane of the Prefer-
The actual number of ences dialog box.
pixels in the image is
the most important
information. Note:
Press Command-
Option-I/Control-Alt-I
to open the Image Size
dialog box.
Click and drag in the Use this widget to
preview window to change the preview
show a different area. percentage.

Project 1: Composite Movie Ad 27