kopia lustrzana https://gitlab.com/sane-project/backends
310 wiersze
6.8 KiB
HTML
310 wiersze
6.8 KiB
HTML
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.6 [en] (X11; I; Linux 2.2.11 i586) [Netscape]">
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<meta name="Author" content="Oliver Rauch">
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<meta name="Keywords" content="umax,scanner,driver,linux,unix,os/2">
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<title>SANE-UMAX documentation - options</title>
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</head>
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<body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000">
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<h1>
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<img SRC="sane-logo2.jpg" height=150 width=128 align=LEFT></h1>
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<h1>
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<font color="#009900"> </font></h1>
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<h1>
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<font color="#009900"> </font><u><font color="#000099">OPTIONS</font></u></h1>
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<p><br><img SRC="sane-umax-text.jpg" height=45 width=157 align=ABSCENTER>
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<br>
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<br>
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<h2>
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<b>FRONTEND FUNCTIONS AND OPTIONS:</b></h2>
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<blockquote>This backend dynamically enabeles the options that are supported
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by the scanner in dependence of the scanning-mode and other options. Here
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is an example of the frontend <a href="http://www.wolfsburg.de/~rauch/sane/sane-xsane.html"><i>x</i>sane</a>
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:</blockquote>
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<center><img SRC="sane-umax.jpg" height=441 width=270><img SRC="sane-umax-histogram.jpg" height=369 width=280></center>
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<p><br>
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<blockquote>
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<blockquote>The options Gamma, brightness, contrast and negative in the
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main window come from xsane that calculates a gamma table using this values.
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These values are corelated to highlight, midlight and shadow sliders in
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the Histogram window.</blockquote>
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</blockquote>
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<br>
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<h3>
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Scan modes:</h3>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="700" >
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<tr BGCOLOR="#40E0D0">
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<td><b>Mode</b></td>
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<td><b>Remark</b></td>
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</tr>
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<tr>
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<td>Lineart</td>
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<td>1 bit/pixel black/white mode</td>
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</tr>
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<tr>
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<td>Halftone</td>
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<td>1 bit/pixel dithered black/white mode</td>
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</tr>
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<tr>
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<td>Grayscale</td>
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<td>8 / 9 / 10 / 12 / 14 / 16 bits/pixel gray mode</td>
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</tr>
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<tr>
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<td>Color</td>
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<td>24 / 27 / 30 / 36 / 42 / 48 bits/pixel RGB mode</td>
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</tr>
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</table></center>
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<br>
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<h3>
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Scan sources:</h3>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="300" NOSAVE >
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<tr BGCOLOR="#40E0D0">
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<td B>Scan sources</td>
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</tr>
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<tr>
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<td>Flatbed</td>
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</tr>
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<tr>
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<td>Transparency adapter (UTA)</td>
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</tr>
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<tr>
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<td>Automatic document feeder (ADF)</td>
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</tr>
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</table></center>
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<br>
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<h3>
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Standard options:</h3>
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<center><img SRC="sane-umax-standard.jpg" height=272 width=309></center>
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<p><br>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="700" >
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<tr BGCOLOR="#40E0D0">
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<td><b>Standard options</b></td>
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<td><b>Remark</b></td>
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</tr>
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<tr>
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<td>Analog <a href="http://www.mostang.com/sane/sane-gamma.html">gamma</a>
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correction</td>
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<td>Define the value for analog gamma correction. *
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<br>Value between 1.0 and 2.0 .
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<br>(Analog gamma correction doesn't reduce the number of used colors)</td>
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</tr>
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<tr>
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<td>Highlight</td>
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<td>Define the intensity that shall be considered white. *</td>
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</tr>
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<tr>
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<td>Shadow</td>
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<td>Define the intensity that shall be considered black. *</td>
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</tr>
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<tr>
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<td>Contrast</td>
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<td>Define the contrast of the image - only available in halftone-mode.</td>
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</tr>
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<tr>
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<td>Brightness</td>
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<td>Define the brightness of the image - only available in halftone-mode.</td>
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</tr>
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<tr>
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<td>Threshold</td>
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<td>Define the minimum intensity to get a white point- only available in
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lineart-mode.</td>
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</tr>
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<tr>
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<td>Use custom <a href="http://www.mostang.com/sane/sane-gamma.html">gamma</a>
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table</td>
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<td>Use free definable scanner internal digital gamma table.
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<br>If you enable this option, the gamma correction is done inside the
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scanner. If you have a scanner with more than 8/24 bits/pixel, the image
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is scanned with the maximum available bit depth. The gamma correction does
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transform the image form the internal bit depth to the selected output
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<b><i>bit
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depth</i></b> (see below).
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<br>The frontends do handle the usage of the gamma table different. If
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you use xsane, you should enable this option to use the maximum available
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bit depth (otherwise xsane does the conversion with the selected output
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bit depth).
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<br>(Side-effect: digital gamma correction may reduce the number of used
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colors -especally if the used bit depth is low.)</td>
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</tr>
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<tr>
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<td>Quality calibration</td>
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<td>Use quality white calibration. *</td>
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</tr>
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<tr>
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<td>Double optical resolution</td>
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<td>Use lens 2 on high end scanners, this reduces the scanwidth and increases
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the maximum scanresolution. *</td>
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</tr>
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<tr>
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<td>Negative scan</td>
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<td>Inverts color intensity - for scanning negatives.</td>
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</tr>
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<tr>
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<td>Bit depth</td>
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<td>Image depth in bits/sample the scanner sends to the computer, normally
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8 in grayscale and color mode. Some scanners support more than 8bits/sample,
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but only few file formats support it. If your scanner supports more than
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8bis/sample you already get an improvement if you set the bit detpth to
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8 and enable the option <i>use custom gamma table</i> (see above) because
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the scanner internal gamma correction is done with the maximum available
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bit depth!!!
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<center><b>*** There is normally no reason to use more than 8 bits/sample!
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***</b></center>
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</td>
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</tr>
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<tr>
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<td>Lamp warmup</td>
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<td>Enable extended lamp-warmup. *</td>
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</tr>
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</table></center>
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<center>
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<p>* only available for some scanners</center>
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<p><br>
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<h3>
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Advanced Options:</h3>
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<center><img SRC="sane-umax-advanced.jpg" height=235 width=291></center>
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<p><br>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="700" >
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<tr BGCOLOR="#40E0D0">
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<td><b>Advanced options</b></td>
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<td><b>Remark</b></td>
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</tr>
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<tr>
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<td>Set exposure time</td>
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<td>Enable selection of exposure time, if not enabled, scanner uses default
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values. *</td>
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</tr>
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<tr>
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<td>Cal. exposure time</td>
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<td>Define exposure time for calibration. *</td>
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</tr>
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<tr>
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<td>Scan exposure time</td>
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<td>Define exposure time for scan. *</td>
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</tr>
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<tr>
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<td>Set lamp density</td>
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<td>Enable selection of lamp density, if not enabled, scanner automatically
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selects a value. *</td>
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</tr>
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<tr>
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<td>Cal. lamp density</td>
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<td>Define lamp density for calibration. *</td>
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</tr>
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<tr>
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<td>Set scan lamp density</td>
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<td>Enable selection of lamp density for scan, if not enabled scanner uses
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the value that was used for calibration. *</td>
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</tr>
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<tr>
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<td>Scan lamp density</td>
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<td>Define lamp density for scan. *</td>
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</tr>
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<tr>
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<td>lamp on</td>
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<td>Turn on scanner lamp. *</td>
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</tr>
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<tr>
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<td>lamp off</td>
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<td>Turn off scanner lamp. *</td>
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</tr>
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<tr>
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<td>lamp off at exit</td>
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<td>Turn off scanner lamp when program exits (when sane_close is called)
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*</td>
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</tr>
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</table></center>
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<center>
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<p>* only available for some scanners</center>
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<p>
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<hr WIDTH="100%">
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<center><a href="sane-umax-doc.html">SANE-UMAX index</a>
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<br>
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<hr WIDTH="100%">
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<br><font color="#009900">This page has been changed on 28th. august 2000</font></center>
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<p><br>
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<br>
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</body>
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</html>
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