NAME<\/a> sane\u2212epkowa – SANE backend for EPSON scanners<\/p>\n The sane\u2212epkowa<\/b> library implements a SANE (Scanner Access Now Easy) backend that provides access to a large number of EPSON devices. A list with supported device information may be found in the iscan-data<\/i> package\u2019s documentation directory, typically \/usr\/share\/doc\/iscan-data\/.<\/i><\/p>\n The options the backend supports can either be selected through command line options to programs like scanimage or through GUI elements in xscanimage or xsane.<\/p>\n Valid command line options and their syntax can be listed by using<\/p>\n scanimage \u2212\u2212help \u2212d epkowa<\/p>\n Not all devices support all options and not all options may be docmented below. The \u2212\u2212mode<\/i> switch selects the basic mode of operation of the scanner valid choices are Binary, Gray and Color.<\/i> The Binary mode is black and white only, Gray will produce up to 256 levels of gray and Color means 24 bit color mode. Some scanners will internally use 36 bit color, the external interface however does only support 24 bits.<\/p>\n The \u2212\u2212halftoning<\/i> switch selects the mode that is used in Binary mode. Valid options are None, Halftone A (Hard Tone), Halftone B (Soft Tone), Halftone C (Net Screen), Dither A (4×4 Bayer), Dither B (4×4 Spiral), Dither C (4×4 Net Screen), Dither D (8×4 Net Screen), Text Enhanced Technology, Download pattern A, and Download pattern B.<\/p>\n The \u2212\u2212dropout<\/i> switch selects the so called dropout color. Valid options are None, Red, Green and Blue. The default is None. The dropout color is used for monochrome scanning and selects the color that is not scanned. This can be used to e.g. scan an original with a colored background.<\/p>\n The \u2212\u2212brightness<\/i> switch controls the brightness of the scan. Valid options are the numbers from \u22123 to 3. The default is 0. The larger the brightness value, the brighter the image gets. If a user defined table for the gamma correction is selected, the brightness parameter is not available.<\/p>\n The \u2212\u2212sharpness<\/i> switch sets the sharpness of the image data. Valid options are the numbers from \u22122 to 2, with \u22122 meaning “Defocus”, \u22121 “Defocus slightly”, 0 “Normal”, 1 “Sharpen slighly” and 2 “Sharpen”.<\/p>\n The \u2212\u2212gamma\u2212correction<\/i> switch controls the scanner\u2019s internal gamma correction. Valid options are “Default”, “User defined”, “High density printing” “Low density printing” and “High contrast printing”.<\/p>\n The \u2212\u2212color\u2212correction<\/i> switch controls the scanner\u2019s internal color correction function. Valid options are “No Correction”, “Impact\u2212dot printers”, “Thermal printers”, “Ink\u2212jet printers” and “CRT monitors”. The default is “CRT monitors”.<\/p>\n The \u2212\u2212resolution<\/i> switch selects the resolution for a scan. Many EPSON scanners will scan in any resolution between the lowest and highest possible value. The list reported by the scanner can be displayed using the “\u2212\u2212help \u2212d epkowa” parameters to scanimage.<\/p>\n The \u2212\u2212mirror<\/i> option controls the way the image is scanned. By reading the image data from right to left the image is mirored. Valid options are “yes” and “no”. The default is “no”.<\/p>\n The \u2212\u2212speed<\/i> option can improve the scan speed in monochrome mode. Valid options are “yes” or “no”, the “yes” option will speed up the scan if this option is supported.<\/p>\n The \u2212\u2212auto\u2212area\u2212segmentation<\/i> switch turns on the automatic area segmentation for monochrome scans. The scanner will try to determine which areas are text and which contain images. The image areas will be halftoned, and the text will be impoved. Valid options are “yes” and “no”. The default is “yes”.<\/p>\n The \u2212\u2212gamma\u2212table<\/i> parameter can be used to download a user defined gamma table. The options takes 256 values from the range 0..255. In color mode this option equally affects the red, green, and blue channel.<\/p>\n The \u2212\u2212red\u2212gamma\u2212table<\/i> parameter can be used to download a user defined gamma table for the red channel. The valid options are the same as for \u2212\u2212gamma\u2212table.<\/p>\n The \u2212\u2212green\u2212gamma\u2212table<\/i> parameter can be used to download a user defined gamma table for the green channel. The valid options are the same as for \u2212\u2212gamma\u2212table.<\/p>\n The \u2212\u2212blue\u2212gamma\u2212table<\/i> parameter can be used to download a user defined gamma table for the blue channel. The valid options are the same as for \u2212\u2212gamma\u2212table.<\/p>\n The color correction coefficients \u2212\u2212cct\u22121 \u2212\u2212cct\u22122 \u2212\u2212cct\u22123 … \u2212\u2212cct\u22129<\/i> will install color correction coefficients for the user defined color correction. Possible values are in the range \u2212127..127.<\/p>\n The \u2212\u2212preview<\/i> option requests a preview scan. The frontend software automatically selects a low resolution. Valid options are “yes” and “no”. The default is “no”.<\/p>\n The \u2212\u2212preview\u2212speed<\/i> options will increase the scan speed if this is supported by the scanner. Valid options are “yes” and “no”, the default is “no”.<\/p>\n The geometry options \u2212l \u2212t \u2212x \u2212y<\/i> control the scan area: \u2212l sets the top left x coordinate, \u2212t the top left y coordinate, \u2212x selects the width and \u2212y the height of the scan aea. All parameters are specified in milimeters.<\/p>\n The \u2212\u2212quick\u2212format<\/i> option lets the user select a scan area with predefined sizes. Valid parameters are “CD”, “A5 portrait”, “A5 landscape”, “Letter”, “A4” and “max”. The default is “max”, which selects the largest possible area.<\/p>\n The \u2212\u2212source<\/i> option selects the scan source. Valid options depend on the installed options. The default is “Flatbed”.<\/p>\n The \u2212\u2212auto\u2212eject<\/i> option will eject a page after scanning from the document feeder.<\/p>\n The configuration file \/etc\/sane.d\/epkowa.conf specifies the device(s) that the backend will use. Possible connection types are:<\/p>\n
DESCRIPTION<\/a>
OPTIONS<\/a>
CONFIGURATION FILE<\/a>
FILES<\/a>
ENVIRONMENT<\/a>
SEE ALSO<\/a>
BUGS<\/a>
UNSUPPORTED DEVICES<\/a>
AUTHOR<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
DESCRIPTION <\/a> <\/h2>\n
OPTIONS <\/a> <\/h2>\n
Scan Mode<\/i><\/p>\nCONFIGURATION FILE <\/a> <\/h2>\n