1sane-rts8891(5) SANE Scanner Access Now Easy sane-rts8891(5)
2
6 sane-rts8891 - SANE backend for rts8891 based scanners
7
9 The sane-rts8891 library implements a SANE (Scanner Access Now Easy)
10 backend that provides access to scanners based on the rts8891 ASIC.
11 The scanners that work with this backend are:
13 Vendor Model status
15 ---------------------- -----------
16 Umax Astra 4400 untested
17 Umax Astra 4450 untested
18 HP scanjet 4000c good
19 HP scanjet 4470c good
20 The options the backend supports can either be selected through command
22 line options to programs like scanimage or through GUI elements in
23 xscanimage or xsane.
24 If you have any strange behavior, please report to the backend main‐
26 tainer or to the SANE mailing list.
27 Valid command line options and their syntax can be listed by using
29 scanimage --help -d rts8891
30 Scan Mode Options
33 --mode selects the basic mode of operation of the scanner valid choices
36 are R Color , Gray and Lineart The default mode is Color. The
37 Lineart mode is black and white only (1 bit). Grayscale will
38 produce 256 levels of gray (8 bits). Color mode allows for over
39 16 million different colors produced from 24 bits of color
40 information.
41 --resolution
44 selects the resolution for a scan. The horizontal and vertical
45 resolutions are set by the value of this option. The scanner is
46 capable of the following resolutions for the specified option
47 value:
48 Value Hor. Resolution Vert. Resolution
50 ----- --------------- -------------------
51 75 75dpi 75dpi
52 150 150dpi 150dpi
53 300 300dpi 300dpi
54 600 600dpi 600dpi
55 1200 1200dpi 1200dpi
56 --preview
59 requests a preview scan. The resolution used for that scan is 75
60 dpi and the scan area and the scan mode are as specified through
61 their options, or the default if not specified. The default
62 value for preview mode is "no".
63 --threshold
66 selects the minimum-brightness to get a white point. The
67 threshold is only used with Lineart mode scans. It is specified
68 as a percentage in the range 0..100% (in steps of 1). The
69 default value of the threshold option is 50.
70
74 The configuration file /etc/sane.d/rts8891.conf contains the usb device
75 ids of supported scanners (eg usb 0x043d 0x007c) and scanner configura‐
76 tion options. Empty lines and lines starting with a hash mark (#) are
77 ignored.
78 The options supported are allowsharing , modelnumber
80 Option
82 allowsharing enables or not the sharing of the scanner between multiple
84 frontends at the same time.
85 modelnumber is used to force the reported model by the backend and is
87 only usefull in the case of a scanner which NVRAM has been erased.
88 0 to report a HP4470c.
89 1 to report a HP4400c.
90 2 to report an Astra 4400.
91
94 /usr/lib64/sane/libsane-rts8891.a
95 The static library implementing this backend.
96 /usr/lib64/sane/libsane-rts8891.so
98 The shared library implementing this backend (present on systems
99 that support dynamic loading).
100
104 SANE_DEBUG_RTS8891 SANE_DEBUG_RTS8891_LOW SANE_DEBUG_RTS88XX_LIB
105 If the library was compiled with debug support enabled, these
106 environment variables controls the debug level for this backend.
107 E.g., a value of 255 requests all debug output to be printed.
108 Smaller levels reduce verbosity.
109
113 Scanners of the same model exist with different sensors, due to lack of
114 data (ie USB logs) some sensors are better supported than others. At
115 least 75 dpi mode is working for any model. Sharing the a scanner
116 between several frontends at the same time (allowsharing option) may
117 not work on some USB controllers.
118 XPA is no (yet) supported.
120
122 No bugs currently known.
123
127 sane-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)
128
132 This backend has been developped by Stéphane Voltz.
133 http://stef.dev.free.fr/sane/rts8891
134
136 Many thanks go to:
137 Laurent Fournier who donated me a HP4470c. Vladimir Sysoev and
138 "TheUnruly Squash" for the time they spent recording USB activ‐
139 ity and testing the experimental version on HP4400 models.
140 8 Dec 2008 sane-rts8891(5)