Using Camera RAW in Photoshop CS
as Your Digital Darkroom, page 7
Size
The size drop-down list gives you some image size options in pixels. The image size selected by default
in the drop-down list is the size at which your camera captured the image. You can scale up or down depending
upon your needs.
Remember, though, that scaling up can have some consequences. Since a larger image needs more pixels,
Photoshop will add those pixels to the image, coloring them by selecting color from surrounding pixels.
This can lead to an image that looks fuzzy, not clear and sharp like the original.
Resolution
The Resolution text box and drop-down list let you set how many pixels per inch (ppi) (or pixels per
centimeter) your image has. A higher resolution makes for a crisper looking printed page. Typically, a
better digital camera captures Camera Raw images at 240 ppi or greater. (By comparison, the same camera
would save the image at 180 ppi when it is saved as a JPEG.) A good setting for web graphics and images
is 96 ppi.
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