kopia lustrzana https://gitlab.com/sane-project/backends
121 wiersze
4.5 KiB
Groff
121 wiersze
4.5 KiB
Groff
.TH sane\-hs2p 5 "13 Jul 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
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.IX sane\-hs2p
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.SH NAME
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sane\-hs2p \- SANE backend for Ricoh SCSI flatbed/ADF scanners
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.SH DESCRIPTION
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The
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.B sane\-hs2p
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library implements a SANE (Scanner Access Now Easy) backend that provides
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access to the Ricoh IS450 family of scanners. Should also work with the IS420,
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IS410, and IS430 scanners, but these are untested.
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Please contact the maintainer or the sane\-devel mailing list if you own such a scanner.
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.PP
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This backend is alpha-quality. It may have bugs and some scanners haven't been
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tested at all. Be careful and pull the plug if the scanner causes unusual
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noise.
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.SH "DEVICE NAMES"
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This backend expects device names of the form:
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.PP
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.RS
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.I special
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.RE
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.PP
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Where
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.I special
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is either the path-name for the special device that corresponds to a SCSI
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scanner. The program
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.I sane\-find\-scanner
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helps to find out the correct device. Under Linux, such a device name could be
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.I /dev/sg0
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or
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.IR /dev/sga ,
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for example. See
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.BR sane\-scsi (5)
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for details.
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.SH CONFIGURATION
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The contents of the
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.I hs2p.conf
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file is a list of device names that correspond to SCSI
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scanners. Empty lines and lines starting with a hash mark (#) are
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ignored. See
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.BR sane\-scsi (5)
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on details of what constitutes a valid device name.
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.SH FILES
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.TP
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.I @CONFIGDIR@/hs2p.conf
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The backend configuration file (see also description of
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.B SANE_CONFIG_DIR
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below).
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.TP
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.I @LIBDIR@/libsane\-hs2p.a
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The static library implementing this backend.
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.TP
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.I @LIBDIR@/libsane\-hs2p.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_CONFIG_DIR
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This environment variable specifies the list of directories that may
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contain the configuration file. Under UNIX, the directories are
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separated by a colon (`:'), under OS/2, they are separated by a
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semi-colon (`;'). If this variable is not set, the configuration file
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is searched in two default directories: first, the current working
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directory (".") and then in @CONFIGDIR@. If the value of the
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environment variable ends with the directory separator character, then
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the default directories are searched after the explicitly specified
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directories. For example, setting
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.B SANE_CONFIG_DIR
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to "/tmp/config:" would result in directories "tmp/config", ".", and
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"@CONFIGDIR@" being searched (in this order).
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.TP
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.B SANE_DEBUG_HS2P
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend.
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A value of 255 prints all debug output. Smaller values reduce verbosity.
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.SH CURRENT STATUS
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The hs2p backend is now in version 1.00. All major scanning-related features
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are supported, except for those features requiring the optional IPU. Scanning
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from the flatbed or ADF (either simplex or duplex) is supported. Lineart,
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halftone, 4-bit gray, and 8-bit gray are supported. Pre-set gamma tables and
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halftone patterns are supported, as well as brightness, threshold, contrast.
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Also supported is scan wait mode, binary and gray filtering, negative scanning,
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and absolute or relative white setting. Printing with the optional endorser
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also is supported.
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.SH PLANNED FUNCTIONALITY
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This scanner can scan from the ADF in continuous simplex mode.
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Surprisingly, many scanners scan an entire document from the ADF
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into memory before ejecting the sheet. Thus if the document is too
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long, the scanner cannot hold the entire image data in memory.
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But if the scanner would send its image data when its memory got full,
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and then read the next buffer's worth of data, continuous scanning
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could be achieved.
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.SH MISSING FUNCTIONALITY
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The SCSI commands for uploading (2AH) or downloading (28H)
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custom halftone patterns (02H) and gamma vectors (03H) should work,
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but require implementing the SANE Option-Value code to allow the
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user to create the tables to be uploaded to the scanner. No support
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for Maintenance Data (80H) is planned as this functionality is more
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suited to a stand-alone utility to be used by a technician when
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replacing the lamp or ADF unit. Nor is support for reading or changing
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IPU (93H) paramters and adjustments planned, since my IS450 lacks
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such a unit. The 31-byte Auto Photo/Letter struct and 21-byte Dynamic
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threshold struct are documented in the hs2p-scsi.h file should someone
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wish to use their IPU for image data processing.
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.SH "SEE ALSO"
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.BR sane (7),
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.BR sane\-find\-scanner (1),
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.BR sane\-scsi (5),
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.SH AUTHOR
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jeremy <jeremy@acjlaw.net>
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.br
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Maintained by Jeremy Johnson <jeremy@acjlaw.net>
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