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165 wiersze
6.3 KiB
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<TITLE>sane-rts8891.5</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>sane-rts8891.5</H1>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<B><A HREF="sane-rts8891.5.html">sane-rts8891(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-rts8891.5.html">sane-rts8891(5)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-rts8891 - SANE backend for rts8891 based scanners
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-rts8891</B> library implements a SANE (Scanner Access Now Easy)
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backend that provides access to scanners based on the rts8891 ASIC.
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The scanners that work with this backend are:
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Vendor Model status
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---------------------- -----------
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Umax Astra 4400 untested
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Umax Astra 4450 untested
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HP scanjet 4000c good
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HP scanjet 4470c good
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The options the backend supports can either be selected through command
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line options to programs like <B><A HREF="scanimage.1.html">scanimage(1)</A></B> or through GUI elements in
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<B><A HREF="xscanimage.1.html">xscanimage(1)</A></B> or <B><A HREF="xsane.1.html">xsane(1)</A></B>.
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If you notice any strange behavior, please report to the backend main-
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tainer or to the SANE mailing list.
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Valid command line options and their syntax can be listed by using
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scanimage --help -d rts8891
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<B>Scan</B> <B>Mode</B> <B>Options</B>
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<B>--mode</B> selects the basic mode of operation of the scanner. Valid
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choices are <I>Color</I>, <I>Gray</I> and <I>Lineart</I>. The default mode is <I>Color</I>.
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The <I>Lineart</I> mode is for black and white only (1 bit). <I>Gray</I> will
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produce 256 levels of gray (8 bits). <I>Color</I> mode allows for over
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16 million different colors produced from 24 bits of color in-
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formation.
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<B>--resolution</B>
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selects the resolution for a scan. The horizontal and vertical
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resolutions are set by the value of this option. The scanner is
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capable of the following resolutions for the specified option
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value:
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Value Hor. Resolution Vert. Resolution
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----- --------------- -------------------
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75 75dpi 75dpi
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150 150dpi 150dpi
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300 300dpi 300dpi
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600 600dpi 600dpi
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1200 1200dpi 1200dpi
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<B>--preview</B>
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requests a preview scan. The resolution used for that scan is 75
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dpi and the scan area and the scan mode are as specified through
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their options, or the default if not specified. The default
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value for preview mode is "no".
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<B>--threshold</B>
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selects the minimum-brightness to get a white point. The
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threshold is only used with Lineart mode scans. It is specified
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as a percentage in the range 0..100% (in steps of 1). The de-
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fault value of the threshold option is 50.
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</PRE>
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<H2>CONFIGURATION FILE</H2><PRE>
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The configuration file <I>/usr/local/etc/sane.d/rts8891.conf</I> contains the
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usb device ids of supported scanners (eg usb 0x043d 0x007c) and scanner
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configuration options. Empty lines and lines starting with a hash mark
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(#) are ignored.
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The options supported are <B>allowsharing</B>, <B>modelnumber</B>
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Option
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<B>allowsharing</B>
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enables or not the sharing of the scanner between multiple
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frontends at the same time.
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<B>modelnumber</B>
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is used to force the reported model by the backend and is only
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useful in the case of a scanner which NVRAM has been erased.
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0 to report a HP4470c.
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1 to report a HP4400c.
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2 to report an Astra 4400.
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/lib/sane/libsane-rts8891.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-rts8891.so</I>
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The shared library implementing this backend (present on systems
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that support dynamic loading).
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_DEBUG_RTS8891</B> <B>SANE_DEBUG_RTS8891_LOW</B> <B>SANE_DEBUG_RTS88XX_LIB</B>
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If the library was compiled with debug support enabled, these
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environment variables control the debug level for this backend.
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E.g., a value of 255 requests all debug output to be printed.
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Smaller levels reduce verbosity.
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</PRE>
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<H2>LIMITATIONS</H2><PRE>
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Scanners of the same model exist with different sensors, due to lack of
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data (ie USB logs) some sensors are better supported than others. At
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least 75 dpi mode is working for any model. Sharing the scanner between
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several frontends at the same time (allowsharing option) may not work
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on some USB controllers.
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XPA is not (yet) supported.
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</PRE>
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<H2>BUGS</H2><PRE>
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No bugs currently known.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B>, <B><A HREF="scanimage.1.html">scanimage(1)</A></B>, <B><A HREF="xscanimage.1.html">xscanimage(1)</A></B>, <B><A HREF="xsane.1.html">xsane(1)</A></B>, <B><A HREF="sane.7.html">sane(7)</A></B>
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</PRE>
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<H2>AUTHOR</H2><PRE>
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This backend has been developed by St<B>e</B>phane Voltz.
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<I>http://stef.dev.free.fr/sane/rts8891</I>
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</PRE>
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<H2>CREDITS</H2><PRE>
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Many thanks go to:
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Laurent Fournier who donated me a HP4470c. Vladimir Sysoev and
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"TheUnruly Squash" for the time they spent recording USB activ-
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ity and testing the experimental version on HP4400 models.
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8 Dec 2008 <B><A HREF="sane-rts8891.5.html">sane-rts8891(5)</A></B>
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</PRE>
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