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ADOBE PHOTOSHOP CS2
User Guide
A
B
C
Resampling pixels
A.
Downsampled
B.
Original
C.
Resampled up (selected pixels displayed for each set of images)
Keep in mind that resampling can result in poorer image quality. For example, when you resample an image to larger
pixel dimensions, the image loses some detail and sharpness. Applying the Unsharp Mask filter to a resampled image
can help refocus the image details.
You can avoid the need for resampling by scanning or creating the image at a sufficiently high resolution. If you want
to preview the effects of changing pixel dimensions on-screen or to print proofs at different resolutions, resample a
duplicate of your file.
See also
“Sharpening images” on page 354
Choosing an interpolation method
When an image is resampled, an
interpolation method
is used to assign color values to any new pixels that Photoshop
creates, based on the color values of existing pixels in the image. Photoshop and ImageReady use sophisticated
methods to preserve the quality and detail from the original image when you resample.
In the General Preferences dialog box, you can specify which default interpolation method to use whenever you
resample images using the Image Size or transformation commands. The Image Size command also lets you specify
an interpolation method other than the default.
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