From 6e9c41a892ed0e0da326e0278b3221ce3f5713b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Mon, 6 Oct 2014 14:00:40 +0200 Subject: Initial import of sane-backends version 1.0.24-1.2 --- doc/umax/sane-umax-standard-options-doc.html | 274 +++++++++++++++++++++++++++ 1 file changed, 274 insertions(+) create mode 100644 doc/umax/sane-umax-standard-options-doc.html (limited to 'doc/umax/sane-umax-standard-options-doc.html') diff --git a/doc/umax/sane-umax-standard-options-doc.html b/doc/umax/sane-umax-standard-options-doc.html new file mode 100644 index 0000000..da0ade3 --- /dev/null +++ b/doc/umax/sane-umax-standard-options-doc.html @@ -0,0 +1,274 @@ + + + + + + + SANE-umax backend + + + + + + + + + +
+SANE-logo +
+UMAX-logo +		 +
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SANE-umax backend

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+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 +XSane: +
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main-window
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+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. + +
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Scan modes:

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ModeRemark
Lineart1 bit/pixel black/white mode
Halftone1 bit/pixel dithered black/white mode
Grayscale8 / 9 / 10 / 12 / 14 / 16 bits/pixel gray mode
Color24 / 27 / 30 / 36 / 42 / 48 bits/pixel RGB mode
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Scan sources:

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Scan sources
Flatbed
Transparency adapter (UTA)
Automatic document feeder (ADF)
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Standard options:

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sane-umax-standard-options-screenshot
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Standard optionsRemark
Analog gamma correctionDefine the value for analog gamma correction. * +
Value between 1.0 and 2.0 . +
(Analog gamma correction doesn't reduce the number of used colors)
HighlightDefine the intensity that shall be considered white. *
ShadowDefine the intensity that shall be considered black. *
ContrastDefine the contrast of the image - only available in halftone-mode.
BrightnessDefine the brightness of the image - only available in halftone-mode.
ThresholdDefine the minimum intensity to get a white point- only available in +lineart-mode.
Use custom gamma tableUse 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 calibrationUse quality white calibration. *
Double optical resolutionUse lens 2 on high end scanners, this reduces the scanwidth and increases +the maximum scanresolution. *
Negative scanInverts color intensity - for scanning negatives.
Bit depthImage 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! *** +
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Lamp warmupEnable extended lamp-warmup. *
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* only available for some scanners

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+Author: Oliver Rauch +
+ + + + -- cgit v1.2.3