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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+   <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+   <meta name="Author" content="Oliver Rauch">
+   <meta name="Description" content="unix scanner driver for UMAX scanners">
+   <title>SANE-umax backend</title>
+</head>
+<body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000">
+
+
+<table>
+<tr>
+<td width=200>
+<img SRC="sane-logo.jpg" alt="SANE-logo" hspace=60 align=BOTTOM>
+<br>
+<img SRC="sane-umax-text.jpg" alt="UMAX-logo" HSPACE=50>
+</td>
+<td>
+<blockquote>
+<h1><font color="#009900">SANE-umax backend</font></h1>
+</blockquote>
+</td>
+</tr>
+</table>
+
+
+<hr WIDTH="100%">
+
+<table>
+<tr>
+<td VALIGN=TOP WIDTH="250" BGCOLOR="#E0E0FF">
+<br>
+<ul>
+<li><a href="sane-umax-doc.html">Index</a></li>
+
+<li>
+Frontend options:
+<ul>
+<li><a href="sane-umax-standard-options-doc.html">Standard options</a></li>
+<li><a href="sane-umax-advanced-options-doc.html">Advanced options</a></li>
+</ul>
+</li>
+
+<li>
+Supported scanners:
+<ul>
+<li><a href="sane-umax-powerlook-doc.html">Power Look series</a></li>
+<li><a href="sane-umax-mirage-doc.html">Mirage series</a></li>
+<li><a href="sane-umax-astra-doc.html">Astra series</a></li>
+<li><a href="sane-umax-vista-doc.html">Vista series</a></li>
+<li><a href="sane-umax-uc-doc.html">UC series</a></li>
+<li><a href="sane-umax-others-doc.html">others</a></li>
+<li><a href="sane-umax-not-listed-doc.html">Not listed scanners</a></li>
+<li><a href="sane-umax-scanner-clones-doc.html">UMAX scanner clones</a></li>
+</ul>
+</li>
+
+<li><a href="sane-umax-parport-doc.html">UMAX parallel port scanners</a></li>
+<li><a href="sane-umax-config-doc.html">Configuration</a></li>
+<li><a href="sane-umax-speed-doc.html">Speed of UMAX scanners</a></li>
+<li><a href="http://www.rauch-domain.de/sane-umax">SANE-umax homepage</a></li>
+<li><a href="http://sane-project.org">SANE homepage</a></li>
+<li><a href="http://www.xsane.org/">XSane homepage</a></li>
+</ul>
+<br>
+</td>              
+
+<td VALIGN=TOP BGCOLOR="#FFFFFF">
+<br>
+<blockquote>
+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
+<a href="http://www.xsane.org">XSane</a>:
+<br>
+<br>
+<br>
+
+<center><img SRC="sane-umax.jpg" alt="main-window"></center>
+
+<p><br>
+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.
+
+<br>
+<h3>Scan modes:</h3>
+
+<center>
+<table BORDER=2 CELLSPACING=2 CELLPADDING=2>
+<tr BGCOLOR="#40E0D0">
+<td><b>Mode</b></td>
+
+<td><b>Remark</b></td>
+</tr>
+
+<tr>
+<td>Lineart</td>
+
+<td>1 bit/pixel black/white mode</td>
+</tr>
+
+<tr>
+<td>Halftone</td>
+
+<td>1 bit/pixel dithered black/white mode</td>
+</tr>
+
+<tr>
+<td>Grayscale</td>
+
+<td>8 / 9 / 10 / 12 / 14 / 16 bits/pixel gray mode</td>
+</tr>
+
+<tr>
+<td>Color</td>
+
+<td>24 / 27 / 30 / 36 / 42 / 48 bits/pixel RGB mode</td>
+</tr>
+</table>
+</center>
+
+
+<br>
+<h3>Scan sources:</h3>
+
+<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2 WIDTH="300" >
+<tr BGCOLOR="#40E0D0">
+<td><b>Scan sources</b></td>
+</tr>
+
+<tr>
+<td>Flatbed</td>
+</tr>
+
+<tr>
+<td>Transparency adapter (UTA)</td>
+</tr>
+
+<tr>
+<td>Automatic document feeder (ADF)</td>
+</tr>
+</table></center>
+
+<br>
+<h3>Standard options:</h3>
+
+<center><img SRC="sane-umax-standard.jpg" ALT="sane-umax-standard-options-screenshot" height=272 width=309></center>
+
+<p><br>
+<center><table BORDER=2 CELLSPACING=2 CELLPADDING=2>
+<tr BGCOLOR="#40E0D0">
+<td><b>Standard options</b></td>
+
+<td><b>Remark</b></td>
+</tr>
+
+<tr>
+<td>Analog gamma correction</td>
+
+<td>Define the value for analog gamma correction. *
+<br>Value between 1.0 and 2.0 .
+<br>(Analog gamma correction doesn't reduce the number of used colors)</td>
+</tr>
+
+<tr>
+<td>Highlight</td>
+
+<td>Define the intensity that shall be considered white. *</td>
+</tr>
+
+<tr>
+<td>Shadow</td>
+
+<td>Define the intensity that shall be considered black. *</td>
+</tr>
+
+<tr>
+<td>Contrast</td>
+
+<td>Define the contrast of the image - only available in halftone-mode.</td>
+</tr>
+
+<tr>
+<td>Brightness</td>
+
+<td>Define the brightness of the image - only available in halftone-mode.</td>
+</tr>
+
+<tr>
+<td>Threshold</td>
+
+<td>Define the minimum intensity to get a white point- only available in
+lineart-mode.</td>
+</tr>
+
+<tr>
+<td>Use custom gamma table</td>
+
+<td>Use free definable scanner internal digital gamma table.
+<br>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
+<b><i>bit depth</i></b> (see below).
+<br>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).
+<br>(Side-effect: digital gamma correction may reduce the number of used
+colors -especally if the used bit depth is low.)</td>
+</tr>
+
+<tr>
+<td>Quality calibration</td>
+
+<td>Use quality white calibration. *</td>
+</tr>
+
+<tr>
+<td>Double optical resolution</td>
+
+<td>Use lens 2 on high end scanners, this reduces the scanwidth and increases
+the maximum scanresolution. *</td>
+</tr>
+
+<tr>
+<td>Negative scan</td>
+
+<td>Inverts color intensity - for scanning negatives.</td>
+</tr>
+
+<tr>
+<td>Bit depth</td>
+
+<td>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 <i>use custom gamma table</i> (see above) because
+the scanner internal gamma correction is done with the maximum available
+bit depth!!!
+<center>
+<b>*** There is normally no reason to use more than 8 bits/sample! ***</b>
+</center>
+</td>
+</tr>
+
+<tr>
+<td>Lamp warmup</td>
+
+<td>Enable extended lamp-warmup. *</td>
+</tr>
+</table></center>
+
+<center>
+<p>* only available for some scanners</center>
+
+</blockquote>
+</td>
+</tr>
+</table>
+
+<hr WIDTH="100%">
+
+<blockquote>
+Author: <a href="mailto:Oliver.Rauch@rauch-domain.de">Oliver Rauch</a>
+</blockquote>
+
+</body>
+</html>
+