User`s guide

INDEX
55
hardware. It is not available for most film scanners or flatbed scanners. This is the
distance between the starting positions of two consecutive frames.
The units for this option are normally in millimeters, but this can be changed with the
Prefs | Crop units (p. 93) option.
Basic Option: This option is displayed when the scanner is capable of frame spacing.
Input | Preview resolution
Use this option to specify the resolution the scanner will use when performing the
preview scan.
If set to "Auto", a resolution will be chosen that results in a preview with roughly one
million pixels. The exact number of pixels depends on the resolutions your scanner is
able to produce.
If set to "Custom", the resolution is selected by theInput | Preview dpi (p. 55) option.
You can also select a specific preview resolution from the list.
Lower resolutions may take less time to scan, and will use less memory. The preview
resolution needs only to be enough for you to determine appropriate cropping, filter
settings, color settings and so on; the result of the final scan is determined by Scan
resolution and other settings, not Preview resolution.
Basic Option: This option is displayed when the scanner is capable of scanning the
same paper or film twice.
Input | Preview dpi
If Input | Preview resolution (p. 55) is set to "Custom", the scanner will use a
hardware-supported resolution that is greater than, or equal to, this value. VueScan
will rescale the image to the requested resolution.
Note that this uses simple rescaling, so if quality is an issue, you should use an external
image editor to rescale the image.
Basic Option: This option is displayed whenInput | Preview resolution (p. 55) is set to
"Custom".
Input | Scan resolution
Use this option to specify the resolution the scanner will use when performing the final
scan.
If set to "Auto", a resolution will be chosen based on whether it's a reflective scan or a
film scan. The exact number of pixels depends on the resolutions your scanner is able
to produce -- the number of pixels is displayed in the status area of the VueScan
window.
If set to "Custom", the resolution is selected by theInput | Scan dpi (p. 56) option.