1sane-hs2p(5) SANE Scanner Access Now Easy sane-hs2p(5)
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6 sane-hs2p - SANE backend for Ricoh SCSI flatbed/ADF scanners
7
9 The sane-hs2p library implements a SANE (Scanner Access Now Easy) back‐
10 end that provides access to the Ricoh IS450 family of scanners. Should
11 also work with the IS420, IS410, and IS430 scanners, but these are
12 untested. Please contact the maintainer or the sane-devel mailing list
13 if you own such a scanner.
14 This backend is alpha-quality. It may have bugs and some scanners
16 haven't been tested at all. Be careful and pull the plug if the scanner
17 causes unusual noise.
18
21 This backend expects device names of the form:
22 special
24 Where special is either the path-name for the special device that cor‐
26 responds to a SCSI scanner. The program sane-find-scanner helps to find
27 out the correct device. Under Linux, such a device name could be
28 /dev/sg0 or /dev/sga, for example. See sane-scsi(5) for details.
29
32 The contents of the hs2p.conf file is a list of device names that cor‐
33 respond to SCSI scanners. Empty lines and lines starting with a hash
34 mark (#) are ignored. See sane-scsi(5) on details of what constitutes
35 a valid device name.
36
39 /etc/sane.d/hs2p.conf
40 The backend configuration file (see also description of
41 SANE_CONFIG_DIR below).
42 /usr/lib64/sane/libsane-hs2p.a
44 The static library implementing this backend.
45 /usr/lib64/sane/libsane-hs2p.so
47 The shared library implementing this backend (present on systems
48 that support dynamic loading).
49
51 SANE_CONFIG_DIR
52 This environment variable specifies the list of directories that
53 may contain the configuration file. Under UNIX, the directories
54 are separated by a colon (`:'), under OS/2, they are separated
55 by a semi-colon (`;'). If this variable is not set, the config‐
56 uration file is searched in two default directories: first, the
57 current working directory (".") and then in /etc/sane.d. If the
58 value of the environment variable ends with the directory sepa‐
59 rator character, then the default directories are searched after
60 the explicitly specified directories. For example, setting
61 SANE_CONFIG_DIR to "/tmp/config:" would result in directories
62 "tmp/config", ".", and "/etc/sane.d" being searched (in this
63 order).
64 SANE_DEBUG_HS2P
66 If the library was compiled with debug support enabled, this
67 environment variable controls the debug level for this backend.
68 A value of 255 prints all debug output. Smaller values reduce
69 verbosity.
70
73 The hs2p backend is now in version 1.00. All major scanning-related
74 features are supported, except for those features requiring the
75 optional IPU. Scanning from the flatbed or ADF (either simplex or
76 duplex) is supported. Lineart, halftone, 4-bit gray, and 8-bit gray are
77 supported. Pre-set gamma tables and halftone patterns are supported, as
78 well as brightness, threshold, contrast. Also supported is scan wait
79 mode, binary and gray filtering, negative scanning, and absolute or
80 relative white setting. Printing with the optional endorser also is
81 supported.
82
85 This scanner can scan from the ADF in continuous simplex mode. Sur‐
86 prisingly, many scanners scan an entire document from the ADF into mem‐
87 ory before ejecting the sheet. Thus if the document is too long, the
88 scanner cannot hold the entire image data in memory. But if the scan‐
89 ner would send its image data when its memory got full, and then read
90 the next buffer's worth of data, continuous scanning could be achieved.
91
94 The SCSI commands for uploading (2AH) or downloading (28H) custom
95 halftone patterns (02H) and gamma vectors (03H) should work, but
96 require implementing the SANE Option-Value code to allow the user to
97 create the tables to be uploaded to the scanner. No support for Mainte‐
98 nance Data (80H) is planned as this functionality is more suited to a
99 stand-alone utility to be used by a technician when replacing the lamp
100 or ADF unit. Nor is support for reading or changing IPU (93H) parame‐
101 ters and adjustments planned, since my IS450 lacks such a unit. The
102 31-byte Auto Photo/Letter struct and 21-byte Dynamic threshold struct
103 are documented in the hs2p-scsi.h file should someone wish to use their
104 IPU for image data processing.
105
108 sane(7), sane-find-scanner(1), sane-scsi(5),
109
112 jeremy <jeremy@acjlaw.net>
113 Maintained by Jeremy Johnson <jeremy@acjlaw.net>
114 13 Jul 2008 sane-hs2p(5)