Adobe Photoshop CS6 Top 100 Simplified Tips and Tricks by Lynette Kent

RESIZE YOUR IMAGE with minimal visible loss
You often need a different size image than the original.
You can resize images using the Image Size dialog box.
By deselecting the Resample Image check box in the
dialog box, you can adjust the width, height, or
resolution without affecting image quality or pixel
dimensions. However, to change the overall size of an
image, you must check the Resample Image box, and
Photoshop resamples by adding or removing pixels to
adjust for the changes.
Photoshop’s interpolation algorithm — the way that it
assigns values to added pixels and smoothes
transitions between juxtaposing pixels — works well
to preserve the quality and detail as long as the size
changes are not extreme. Third-party plug-ins such
as Alien Skin’s Blow Up, OnOne’s Perfect Resize Pro,
and AKVIS Magnifier sometimes get better results
when enlarging greater than 150 to 200 percent,
depending on the image.
The generally recommended resampling method for
reducing image size is Bicubic Sharper, and Bicubic
Smoother is intended for enlarging. Photoshop CS6
now includes Bicubic Automatic, which selects the
best resample method based on the type of resize.
However, depending on the image, many
photographers find that the Bicubic Sharper
resampling method actually works best both for
enlarging and reducing photos.
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3
1
1 Open a photo that you want to
enlarge.
A The current size of the image as
shown on-screen appears here.
2 Click Image.
3 Click Image Size.
A
The Image Size dialog box
appears, showing the current size
of the opened image.
4 Make sure that the Resample
Image check box is selected.
5
5 Double-click in the Document
Size Width box to highlight the
contents.
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