kopia lustrzana https://gitlab.com/sane-project/backends
160 wiersze
4.4 KiB
Groff
160 wiersze
4.4 KiB
Groff
.TH "sane\-rts8891" "5" "8 Dec 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
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.SH "NAME"
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sane\-rts8891 \- SANE backend for rts8891 based scanners
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.SH "DESCRIPTION"
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The
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.B sane\-rts8891
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library implements a SANE (Scanner Access Now Easy) backend that
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provides access to scanners based on the rts8891 ASIC.
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.PP
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The scanners that work with this backend are:
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.PP
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.RS
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.ft CR
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.nf
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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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.fi
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.ft R
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.RE
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The options the backend supports can either be selected through
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command line options to programs like scanimage or through GUI
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elements in xscanimage or xsane.
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.br
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If you have any strange behavior, please report to the backend
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maintainer 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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.RS
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scanimage \-\-help \-d rts8891
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.RE
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.TP
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.B Scan Mode Options
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.TP
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.B \-\-mode
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selects the basic mode of operation of the scanner valid choices are
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.I R Color ,
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.I Gray
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and
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.I Lineart
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The default mode is Color. The Lineart mode is black and white only (1 bit).
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Grayscale will produce 256 levels of gray (8 bits). Color mode allows for over
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16 million different colors produced from 24 bits of color information.
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.TP
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.B \-\-resolution
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selects the resolution for a scan. The horizontal and vertical resolutions are set
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by the value of this option. The scanner is capable of the following resolutions for the specified option value:
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.PP
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.RS
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.ft CR
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.nf
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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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.fi
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.ft R
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.RE
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.TP
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.B \-\-preview
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requests a preview scan. The resolution used for that scan is 75 dpi
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and the scan area and the scan mode are as specified through their options,
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or the default if not specified. The default value for preview mode is "no".
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.TP
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.B \-\-threshold
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selects the minimum\-brightness to get a white point. The threshold is only used with Lineart mode scans.
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It is specified as a percentage in the range 0..100% (in steps of 1).
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The default value of the threshold option is 50.
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.SH "CONFIGURATION FILE"
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The configuration file
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.B @CONFIGDIR@/rts8891.conf
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contains the usb device ids of supported scanners (eg usb 0x043d 0x007c) and scanner configuration options.
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Empty lines and lines starting with a hash mark (#) are
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ignored.
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.PP
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The options supported are
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.B allowsharing
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,
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.B modelnumber
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.
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Option
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.PP
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.B allowsharing
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enables or not the sharing of the scanner between multiple frontends at the same time.
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.PP
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.B modelnumber
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is used to force the reported model by the backend and is only usefull in the case of a scanner which NVRAM has been erased.
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.RS
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.ft CR
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.nf
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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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.fi
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.ft R
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.RE
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.PP
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.SH "FILES"
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.TP
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.I @LIBDIR@/libsane\-rts8891.a
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The static library implementing this backend.
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.TP
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.I @LIBDIR@/libsane\-rts8891.so
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The shared library implementing this backend (present on systems that
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support dynamic loading).
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.SH "ENVIRONMENT"
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.TP
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.B SANE_DEBUG_RTS8891 SANE_DEBUG_RTS8891_LOW SANE_DEBUG_RTS88XX_LIB
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If the library was compiled with debug support enabled, these
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environment variables controls the debug level for this backend. E.g.,
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a value of 255 requests all debug output to be printed. Smaller levels
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reduce verbosity.
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.SH "LIMITATIONS"
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Scanners of the same model exist with different sensors, due to lack of data
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(ie USB logs) some sensors are better supported than others. At least 75 dpi
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mode is working for any model. Sharing the a scanner between several frontends
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at the same time (allowsharing option) may not work on some USB controllers.
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.PP
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XPA is no (yet) supported.
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.SH "BUGS"
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.br
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No bugs currently known.
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.SH "SEE ALSO"
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sane\-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)
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.SH "AUTHOR"
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.TP
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This backend has been developped by St\['e]phane Voltz.
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.I http://stef.dev.free.fr/sane/rts8891
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.SH "CREDITS"
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.TP
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Many thanks go to:
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Laurent Fournier who donated me a HP4470c.
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Vladimir Sysoev and "TheUnruly Squash" for the time they spent recording
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USB activity and testing the experimental version on HP4400 models.
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