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71
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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71
4
Make sure Open Acquired Images in Photoshop is checked. If you have a large number
of images to import, or if you want to edit the images at a later time, deselect it.
5
Make sure Unique Subfolder is selected if you want to save the imported images
directly into a folder named with the current date.
6
Select the scanner that you want to use.
Note:
If the name of your scanner does not appear in the submenu, verify that the
software and drivers were properly installed and that the scanner is connected.
7
Choose the kind of image you want to scan:
•
Color picture to use the default settings for scanning color images.
•
Grayscale picture to use the default settings for scanning grayscale images.
•
Black and White picture or Text to use the default settings.
•
Click Adjust the Quality of the Scanned Picture to use custom settings.
8
Click preview to view the scan. Crop the scan if needed by pulling the rectangle so it
surrounds the image.
9
Click Scan.
10
The scanned image will be saved in the .bmp file format.
Scanning using the resolution setting (Photoshop)
You can determine the resolution for your scan using the original and final image dimen-
sions and the resolution of your output device. Scan resolution translates into image
resolution when you open the scanned image in Photoshop.
To estimate scan resolution:
1
Do one of the following:
•
For laser printers and imagesetters, multiply the printer’s screen frequency by 2.
To determine your printer’s screen frequency, check your printer documentation or
consult your service provider.
•
For ink jet printers, check your printer documentation for the optimal resolution.
Many dye sublimation printers and devices that print directly onto photographic paper
have an optimal resolution of 300 to 400 dpi.
2
Determine the ratio of the final image dimensions to the original image dimensions.
For example, the ratio of a 6-by-9-inch final image to a 2-by-3-inch original image is 3.
3
Multiply the result of step 1 by the result of step 2.
For example, suppose you are printing to an imagesetter with a screen frequency of 85 lpi
and the ratio of the final image to the original is 3. First multiply 85 (the screen frequency)
by 2 to get 170. Then multiply 170 by 3 to get a scan resolution of 510 ppi. If you are
printing to an ink jet printer with an optimal resolution of 300 dpi, multiply 300 by 3 to get
a scan resolution of 900.
Note:
Different color separation procedures might require different ratios of image
resolution to screen frequency. It’s a good idea to check with your service provider or print
shop before you scan the image.
