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69
Adobe Photoshop Help
Getting Images into Photoshop and ImageReady
Using Help
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Contents
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Index
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69
To determine a suggested resolution for an image:
1
Choose Image > Image Size.
2
Click Auto.
3
For Screen, enter the screen frequency for the output device. If desired, choose a new
unit of measurement. Note that the screen value is used only to calculate the image
resolution, not to set the screen for printing.
Important:
To specify the halftone screen ruling for printing, you must use the Halftone
Screens dialog box, accessible through the Print with Preview command. (See
“Selecting
halftone screen attributes” on page 475
.)
4
For Quality, select an option:
•
Draft to produce a resolution the same as the screen frequency (no lower than 72 pixels
per inch).
•
Good to produce a resolution 1.5 times the screen frequency.
•
Best to produce a resolution 2 times the screen frequency.
Scanning images
Before you scan an image, make sure that the software necessary for your scanner has
been installed. To ensure a high-quality scan, you should predetermine the scanning
resolution and dynamic range your image requires. These preparatory steps can also
prevent unwanted color casts from being introduced by your scanner.
Scanner drivers are provided and supported by the manufacturers of the scanners, not
Adobe Systems Incorporated. If you have problems with scanning, make sure that you are
using the latest version of the appropriate scanner driver.
Importing scanned images
You can import scanned images directly from any scanner that has an Adobe Photoshop-
compatible plug-in module or that supports the TWAIN interface. To import the scan using
a plug-in module, choose the scanner name from the File > Import submenu. See your
scanner documentation for instructions on installing the scanner plug-in. For general
plug-in information, see
“Using plug-in modules” on page 58
.
If your scanner does not have an Adobe Photoshop-compatible scanner driver, import the
scan using the TWAIN interface. (See
“Importing an image using the TWAIN interface” on
page 69
.)
If you can’t import the scan using the TWAIN interface, use the scanner manufacturer’s
software to scan your images, and save the images as TIFF, PICT, or BMP files. Then open
the files in Photoshop or ImageReady.
Importing an image using the TWAIN interface
TWAIN is a cross-platform interface for acquiring images captured by certain scanners,
digital cameras, and frame grabbers. The manufacturer of the TWAIN device must provide
a Source Manager and TWAIN Data source for your device to work with Photoshop and
ImageReady.
