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(1) helps to
27 find 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 order).
63 SANE_DEBUG_HS2P
65 If the library was compiled with debug support enabled, this
66 environment variable controls the debug level for this backend.
67 A value of 255 prints all debug output. Smaller values reduce
68 verbosity.
69
72 The sane-hs2p backend is now in version 1.00. All major scanning-
73 related features are supported, except for those features requiring the
74 optional IPU. Scanning from the flatbed or ADF (either simplex or
75 duplex) is supported. Lineart, halftone, 4-bit gray, and 8-bit gray are
76 supported. Pre-set gamma tables and halftone patterns are supported, as
77 well as brightness, threshold, contrast. Also supported is scan wait
78 mode, binary and gray filtering, negative scanning, and absolute or
79 relative white setting. Printing with the optional endorser also is
80 supported.
81
84 This scanner can scan from the ADF in continuous simplex mode. Sur‐
85 prisingly, many scanners scan an entire document from the ADF into mem‐
86 ory before ejecting the sheet. Thus if the document is too long, the
87 scanner cannot hold the entire image data in memory. But if the scan‐
88 ner would send its image data when its memory got full, and then read
89 the next buffer's worth of data, continuous scanning could be achieved.
90
93 The SCSI commands for uploading (2AH) or downloading (28H) custom
94 halftone patterns (02H) and gamma vectors (03H) should work, but
95 require implementing the SANE Option-Value code to allow the user to
96 create the tables to be uploaded to the scanner. No support for Mainte‐
97 nance Data (80H) is planned as this functionality is more suited to a
98 stand-alone utility to be used by a technician when replacing the lamp
99 or ADF unit. Nor is support for reading or changing IPU (93H) parame‐
100 ters and adjustments planned, since my IS450 lacks such a unit. The
101 31-byte Auto Photo/Letter struct and 21-byte Dynamic threshold struct
102 are documented in the hs2p-scsi.h file should someone wish to use their
103 IPU for image data processing.
104
107 sane(7), sane-find-scanner(1), sane-scsi(5),
108
111 jeremy <jeremy@acjlaw.net>
112 Maintained by Jeremy Johnson <jeremy@acjlaw.net>
113 13 Jul 2008 sane-hs2p(5)