Adobe Creative Suite 4 Printing Guide
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Bilinear:
Averages the color of surrounding pixels; fast, but produces medium-
quality results.
•
Bicubic (Best For Smooth Gradients):
Slower, but produces smoother results than
Bilinear.
•
Bicubic Smoother (Best for Enlargement):
As the hint implies, smooths the results
to minimize obvious pixels or jagged artifacts.
•
Bicubic Sharper (Best for Reduction):
Accentuates edge sharpening to camouflage
the loss of data when scaling down images.
Note:
To specify a default scaling method, choose Edit > Preferences > General (Windows) or Pho-
toshop > Preferences > General (Mac OS), and then choose a method from the Image Interpolation
Methods menu.
Changing resolution without resampling
During interpolation, pixels are created or averaged from existing information in the image. But
if you resize an image without resampling, no information is created or lost. The most common
example of this approach involves digital camera images, which are frequently very large, but
with low resolution. The solution for this sort of image is to change the resolution without alter-
ing pixels.
Choose Image > Image Size, and deselect the Resample Image option. You’ll then see that dimen-
sions and resolution are linked together: increase the resolution and the dimensions are reduced.
Decrease the dimensions and the resolution is increased. Set the resolution to an appropriate
value, such as 300 ppi, and the width and height fall into place accordingly. With this approach,
no pixels are lost or created, so the file size is not changed. In essence, only the number of pixels
per inch (or centimeter) is changed, not the actual pixels themselves.
Color mode
If you are using a color-managed workflow, you may be accustomed to receiving RGB or Lab
images from your customers, tagged with the correct color profiles. All Creative Suite 4 products
fully support a color-managed workflow, and Adobe Bridge can synchronize color settings across
all the programs in Creative Suite 4 for consistency. (For more on color management, see the
“Common Resources” chapter in this document.)
If you are not using color management, you probably expect your customers to supply CMYK or
grayscale images in submitted jobs. There are also other color modes to consider, such as gray-
scale, multitone, and bitmap.
Resizing Without Resampling
Digital camera shots often open in Photoshop with
low resolution but oversized dimensions . Turn off
the Resample Image option and set the resolution
or dimensions . The dimensions and resolution are
interrelated, so the file size of the image does not
change because no pixels are lost (or manufactured) .
