SANE-logo
UMAX-logo
SANE-umax backend
sane-umax-doc.html
Index
Frontend options:
sane-umax-standard-options-doc.html
Standard options
sane-umax-advanced-options-doc.html
Advanced options
Supported scanners:
sane-umax-powerlook-doc.html
Power Look series
sane-umax-mirage-doc.html
Mirage series
sane-umax-astra-doc.html
Astra series
sane-umax-vista-doc.html
Vista series
sane-umax-uc-doc.html
UC series
sane-umax-others-doc.html
others
sane-umax-not-listed-doc.html
Not listed scanners
sane-umax-scanner-clones-doc.html
UMAX scanner clones
sane-umax-parport-doc.html
UMAX parallel port scanners
sane-umax-config-doc.html
Configuration
sane-umax-speed-doc.html
Speed of UMAX scanners
http://www.rauch-domain.de/sane-umax
SANE-umax homepage
http://sane-project.org
SANE homepage
http://www.xsane.org/
XSane homepage
This backend dynamically enabeles the options that are supported
by the scanner in dependence of the scanning-mode and other options. Here
is an example of the frontend
http://www.xsane.org
XSane
:
main-window
The options Gamma, brightness, contrast and negative in the
main window come from xsane that calculates a gamma table using this values.
These values are corelated to highlight, midlight and shadow sliders in
the Histogram window.
Scan modes:
Mode
Remark
Lineart
1 bit/pixel black/white mode
Halftone
1 bit/pixel dithered black/white mode
Grayscale
8 / 9 / 10 / 12 / 14 / 16 bits/pixel gray mode
Color
24 / 27 / 30 / 36 / 42 / 48 bits/pixel RGB mode
Scan sources:
Scan sources
Flatbed
Transparency adapter (UTA)
Automatic document feeder (ADF)
Standard options:
sane-umax-standard-options-screenshot
Standard options
Remark
Analog gamma correction
Define the value for analog gamma correction. *
Value between 1.0 and 2.0 .
(Analog gamma correction doesn't reduce the number of used colors)
Highlight
Define the intensity that shall be considered white. *
Shadow
Define the intensity that shall be considered black. *
Contrast
Define the contrast of the image - only available in halftone-mode.
Brightness
Define the brightness of the image - only available in halftone-mode.
Threshold
Define the minimum intensity to get a white point- only available in
lineart-mode.
Use custom gamma table
Use free definable scanner internal digital gamma table.
If you enable this option, the gamma correction is done inside the
scanner. If you have a scanner with more than 8/24 bits/pixel, the image
is scanned with the maximum available bit depth. The gamma correction does
transform the image form the internal bit depth to the selected output
bit depth
(see below).
The frontends do handle the usage of the gamma table different. If
you use xsane, you should enable this option to use the maximum available
bit depth (otherwise xsane does the conversion with the selected output
bit depth).
(Side-effect: digital gamma correction may reduce the number of used
colors -especally if the used bit depth is low.)
Quality calibration
Use quality white calibration. *
Double optical resolution
Use lens 2 on high end scanners, this reduces the scanwidth and increases
the maximum scanresolution. *
Negative scan
Inverts color intensity - for scanning negatives.
Bit depth
Image depth in bits/sample the scanner sends to the computer, normally
8 in grayscale and color mode. Some scanners support more than 8bits/sample,
but only few file formats support it. If your scanner supports more than
8bis/sample you already get an improvement if you set the bit detpth to
8 and enable the option
use custom gamma table
(see above) because
the scanner internal gamma correction is done with the maximum available
bit depth!!!
*** There is normally no reason to use more than 8 bits/sample! ***
Lamp warmup
Enable extended lamp-warmup. *
* only available for some scanners
Author:
mailto:Oliver.Rauch@rauch-domain.de
Oliver Rauch
