kopia lustrzana https://gitlab.com/sane-project/backends
274 wiersze
6.3 KiB
HTML
274 wiersze
6.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 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="Author" content="Oliver Rauch">
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<meta name="Description" content="unix scanner driver for UMAX scanners">
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<title>SANE-umax backend</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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<table>
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<tr>
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<td width=200>
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<img SRC="sane-logo.jpg" alt="SANE-logo" hspace=60 align=BOTTOM>
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<br>
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<img SRC="sane-umax-text.jpg" alt="UMAX-logo" HSPACE=50>
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</td>
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<td>
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<blockquote>
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<h1><font color="#009900">SANE-umax backend</font></h1>
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</blockquote>
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</td>
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</tr>
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</table>
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<hr WIDTH="100%">
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<table>
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<tr>
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<td VALIGN=TOP WIDTH="250" BGCOLOR="#E0E0FF">
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<br>
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<ul>
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<li><a href="sane-umax-doc.html">Index</a></li>
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<li>
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Frontend options:
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<ul>
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<li><a href="sane-umax-standard-options-doc.html">Standard options</a></li>
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<li><a href="sane-umax-advanced-options-doc.html">Advanced options</a></li>
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</ul>
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</li>
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<li>
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Supported scanners:
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<ul>
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<li><a href="sane-umax-powerlook-doc.html">Power Look series</a></li>
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<li><a href="sane-umax-mirage-doc.html">Mirage series</a></li>
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<li><a href="sane-umax-astra-doc.html">Astra series</a></li>
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<li><a href="sane-umax-vista-doc.html">Vista series</a></li>
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<li><a href="sane-umax-uc-doc.html">UC series</a></li>
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<li><a href="sane-umax-others-doc.html">others</a></li>
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<li><a href="sane-umax-not-listed-doc.html">Not listed scanners</a></li>
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<li><a href="sane-umax-scanner-clones-doc.html">UMAX scanner clones</a></li>
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</ul>
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</li>
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<li><a href="sane-umax-parport-doc.html">UMAX parallel port scanners</a></li>
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<li><a href="sane-umax-config-doc.html">Configuration</a></li>
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<li><a href="sane-umax-speed-doc.html">Speed of UMAX scanners</a></li>
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<li><a href="http://www.rauch-domain.de/sane-umax">SANE-umax homepage</a></li>
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<li><a href="http://sane-project.org">SANE homepage</a></li>
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<li><a href="http://www.xsane.org/">XSane homepage</a></li>
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</ul>
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<br>
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</td>
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<td VALIGN=TOP BGCOLOR="#FFFFFF">
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<br>
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<blockquote>
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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
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<a href="http://www.xsane.org">XSane</a>:
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<br>
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<br>
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<br>
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<center><img SRC="sane-umax.jpg" alt="main-window"></center>
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<p><br>
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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 correlated to highlight, midlight and shadow sliders in
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the Histogram window.
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<br>
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<h3>Scan modes:</h3>
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<center>
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<table BORDER=2 CELLSPACING=2 CELLPADDING=2>
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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>
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</center>
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<br>
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<h3>Scan sources:</h3>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="300" >
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<tr BGCOLOR="#40E0D0">
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<td><b>Scan sources</b></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>Standard options:</h3>
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<center><img SRC="sane-umax-standard.jpg" ALT="sane-umax-standard-options-screenshot" height=272 width=309></center>
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<p><br>
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<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2>
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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 gamma 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 gamma 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 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>
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<b>*** There is normally no reason to use more than 8 bits/sample! ***</b>
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</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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</blockquote>
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</td>
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</tr>
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</table>
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<hr WIDTH="100%">
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<blockquote>
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Author: <a href="mailto:Oliver.Rauch@rauch-domain.de">Oliver Rauch</a>
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</blockquote>
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</body>
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</html>
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