kopia lustrzana https://gitlab.com/sane-project/backends
154 wiersze
4.8 KiB
Groff
154 wiersze
4.8 KiB
Groff
.TH sane\-dmc 5 "13 Jul 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
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.IX sane\-dmc
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.SH NAME
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sane\-dmc \- SANE backend for the Polaroid Digital Microscope Camera
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.SH DESCRIPTION
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The
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.B sane\-dmc
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library implements a SANE (Scanner Access Now Easy) backend that
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provides access to the Polaroid Digital Microscope Camera.
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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 the UNIX path-name for the special device that corresponds to the
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scanner. The special device name must be a generic SCSI device or a
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symlink to such a device. Under Linux, such a device name could be
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.I /dev/sga
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or
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.IR /dev/sge ,
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for example.
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.SH IMAGING MODES
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The Polaroid DMC supports a number of imaging modes. This driver supports
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five of the imaging modes:
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.PP
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.TP
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.B Full Frame
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This mode corresponds to the 801-by-600 pixel full-color full-frame image.
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.TP
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.B Viewfinder
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This mode corresponds to the 270-by-201 pixel grey-scale viewfinder image.
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This image is acquired very quickly.
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.TP
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.B Raw
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This mode corresponds to the 1599-by-600 pixel "raw" image from the
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CCD. It is grey-scale, with pixels alternating horizontally between
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red, green and blue stripes. The pixels are twice as high as they are
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wide, so the image is distorted.
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.TP
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.B Thumbnail
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This mode corresponds to the 80-by-60 pixel full-color thumbnail image.
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.TP
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.B Super Resolution
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This image is a 1599-by-1200 pixel full-color image constructed by filtering
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and interpolating the "raw" image. The filtering and interpolation is
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done in software, so this mode is very slow. Also, this mode places
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restrictions on how the image is read which means that the "preview" mode
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of xscanimage does not work in Super Resolution mode.
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.RB ( xcam (1)
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and the non-preview modes of
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.BR scanimage (1)
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and
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.BR xscanimage (1)
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work fine, however.)
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.PP
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.SH OTHER SETTINGS
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.TP
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.B ASA Setting
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This setting adjusts the camera's sensitivity. You can choose one of
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25, 50, or 100 "equivalent" ASA.
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.TP
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.B Shutter Speed
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You can select a shutter speed from 8 to 1000 milliseconds. The shutter
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speed is quantized in units of 32 microseconds.
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.TP
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.B White Balance
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You can choose one of "Daylight", "Incandescent" or "Fluorescent"
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white balances. This setting more-or-less corresponds to the
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"Color Temperature" settings on Polaroid's Windows and Mac software.
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.SH CONFIGURATION
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The contents of the
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.I dmc.conf
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file is a list of device names that correspond to DMC
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scanners. Empty lines and lines starting with a hash mark (#) are
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ignored. A sample configuration file is shown below:
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.PP
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.RS
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/dev/scanner
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.br
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# this is a comment
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.br
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/dev/sge
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.RE
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.SH FILES
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.TP
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.I @CONFIGDIR@/dmc.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\-dmc.a
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The static library implementing this backend.
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.TP
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.I @LIBDIR@/libsane\-dmc.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
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.IR @CONFIGDIR@ .
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If the value of the environment variable ends with the directory separator
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character, then the default directories are searched after the explicitly
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specified directories. For example, setting
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.B SANE_CONFIG_DIR
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to "/tmp/config:" would result in directories
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.IR "tmp/config",
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.IR ".",
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and
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.I "@CONFIGDIR@"
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being searched (in this order).
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.TP
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.B SANE_DEBUG_DMC
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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. E.g.,
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a value of 128 requests all debug output to be printed. Smaller
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levels reduce verbosity.
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.SH BUGS
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In the "Full Frame" and "Raw" modes, images must be read in units
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of entire lines. The driver performs no buffering in these modes;
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if you ask sane_read to read a non-integral number of lines, it
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may read less than you ask for. If you ask sane_read to read
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less than a single line, it returns SANE_STATUS_INVAL.
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.PP
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In the "Super Resolution" mode, images must be read in units of
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\fItwo\fR lines (3198 pixels or 9594 bytes). If you try to read less
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than two lines, you get SANE_STATUS_INVAL. The Super Resolution mode
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is very slow.
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.PP
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In the "Viewfinder" and "Thumbnail" modes, the entire image must
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be read in one SCSI transfer. In this case, the driver performs
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buffering and you can read the image in as small an increment as you
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like.
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.SH "SEE ALSO"
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.BR sane (7),
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.BR sane\-scsi (5)
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.SH AUTHOR
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David F. Skoll
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.PP
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The backend is derived from
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.BR sane\-hp (5)
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by David Mosberger
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