Page 24 - CS6_WD_Look_Inside

7. Click OK to apply the change and return to the document window.

The rulers change to Note:
reflect the new
dimensions of the file. Although many
magazines are printed at
133 lpi, some are printed
Because you did not at 150 lpi. By setting the
resample the image, resolution to 300, your
the screen display file will work for any
does not change.
magazine that prints at
133 or 150 lpi.

8. Save the file and continue to the next exercise.
Because you have already saved this working file with a new name, you can simply
choose File>Save, or press Command/Control-S to save without opening a dialog box.
If you want to change the file name, you can always choose File>Save As.

More on Resolution and Resampling The caveat here is that once you discard (delete) pixels, they

Discarding Pixels
PHOTOSHOP FOUNDATIONS over the Internet. When you scale an image to a smaller size, you will not achieve the same quality as the original (before
Higher resolution means larger file sizes, which translates to
longer processing time for printing or longer download time
are gone. If you later try to re-enlarge the smaller image,
simply resizing can produce files with far greater effective
it was reduced). You should always save reduced images as
resolution than you need. Resampling allows you to reduce
copies instead of overwriting the originals.
the physical size of an image without increasing the
resolution, resulting in a smaller file size.
Resampling
In general, you should always scan images to the size you will use in
your final job. If you absolutely must resize a digital image, you can use
resampling to achieve better results than simply changing the image size.
Photoshop offers five types of resampling algorithms to generate extra pixel
data (when increasing the image size) or to determine which pixels to discard (when reducing the image size).
• Nearest Neighbor is a low-quality but quick method. to process and produces a softer image. To understand
Nearest neighbor interpolates new pixel information how this option works, think of a square bisected
based on only one of the squares in the grid of pixels, both horizontally and vertically — bicubic resampling
usually resulting in an image with a blocky appearance. averages the value of all four of those squares (pixels)
• Bilinear is a medium-quality resampling method. to interpolate the new information.
Bilinear resampling averages adjacent pixels to create • Bicubic Smoother is useful for enlarging images with
new information. smoother results than basic bicubic resampling.
• Bicubic creates the most accurate pixel information • Bicubic Sharper is useful for reducing the size of an
for continuous-tone images; it also takes the longest image and maintaining sharp detail.

32 Project 1: Composite Movie Ad