Operation Manual

37
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The Tool Chest — Crop
The “Crop” palette contains the following items:
Item Description
Crop
(input)
size
Gives the dimensions of the current crop. The units for
input size can be chosen from the menu to the right of
the display; the units chosen are refl ected in the rulers in
the preview area.
Output
size
Gives the output dimensions of the current crop (i.e., the
size of the crop after scanning). The units for output size
can be chosen from the menu to the right of the display.
If a new value is entered for Width or Height when Keep
this crop is selected, the other value will change auto-
matically to maintain the current crop. If Keep this fi le
size is selected when Pixels is chosen in the output units
menu, the other value will automatically change to main-
tain the specifi ed fi le size. This change will be refl ected in
the dimensions of the current crop.
File size
States the size of the fi le that will result if the crop is
scanned at current settings, before JPEG compression (if
applicable) and not including fi le headers (which typically
increase fi le size by about 10 KB).
Scale
Scale (output size relative to the size of the image on fi lm)
can be set by direct entry or using the Scale slider.
Output
resolution
Enter a value for output resolution (minimum 90 ppi).
The units for resolution can be chosen from the menu to
the right of the text box.
Item Description
Custom…
Select from the following menu of custom resolutions:
Add Resolution .................. Add custom resolution
Delete Resolution .............. Delete custom resolution
Inkjet Printer ...................... Set resolution to 360 dpi
Dye Sublimation Printer.... Set resolution to 300 dpi
400 dpi Printer.................... Set resolution to 400 dpi
Choosing an Output Resolution
Choosing an Output Resolution
• Inkjet printers
Most inkjet printers require three or four dots of different colors to
reproduce a single pixel (simulated halftone). The target output reso-
lution for an inkjet printer (in pixels per inch, or ppi) is therefore less
than the printer’s catalogue resolution (in dots in per inch, or dpi). In
general, a resolution of 360 ppi will produce acceptable results.
• Dye sublimation printers
Printers that use photographic or dye-sublimation processes reproduce
each pixel with a single dot (continuous halftone). The target output
resolution for these devices is therefore the same as the printer resolu-
tion.
• Commercial printing
Commercial printing processes typically use from 150 to 300 lines per
inch (lpi). As a rule of thumb, assume an output resolution (in ppi) of
about double the number of lines per inch when scanning for output
on a commercial printer.
• Monitors
Computer monitors are usually considered to have resolutions of from
72 ppi (Macintosh) to 96 ppi (Windows).