Did you check if device is working with for example the program "cheese" works with UVC devices
For this program maybe you have to disable the v4l backend in /etc/sane.d/dll.conf Regards, Gerard Klaver On Thu, 2017-01-05 at 22:28 +0100, Torfinn Ingolfsen wrote: > Hello, > Does anyone here have experience with the v4l backend? > I recently got myself a CZUR ET16 scanner[1,2] and it shows up as a > video device, that is why I have to use the v4l backend. The scanner > has a 16Mpixel sensor, according to the company. > The company has (working) software for Windows, with software for Mac > OS X in beta. No plans for Linux support at this time. > But this device is a USB video class device, so it should work with > sane, provided that the v4l backend is good enough (the man page > still > claims that it is alpha...). > > Anyway, how do you convince the v4l backend to scan in a different > resolution than 640x480? > [tingo@kg-u35jc ~]$ scanimage -V > scanimage (sane-backends) 1.0.25; backend version 1.0.25 > > > [tingo@kg-u35jc ~]$ scanimage -L > device `v4l:/dev/video1' is a Noname CZUR virtual device > device `v4l:/dev/video0' is a Noname USB 2.0 UVC 0.3M Webcam virtual > device > > [tingo@kg-u35jc ~]$ scanimage --help --device-name v4l:/dev/video1 > Usage: scanimage [OPTION]... > > Start image acquisition on a scanner device and write image data to > standard output. > > Parameters are separated by a blank from single-character options > (e.g. > -d epson) and by a "=" from multi-character options (e.g. --device- > name=epson). > -d, --device-name=DEVICE use a given scanner device (e.g. > hp:/dev/scanner) > --format=pnm|tiff|png|jpeg file format of output file > -i, --icc-profile=PROFILE include this ICC profile into TIFF file > -L, --list-devices show available scanner devices > -f, --formatted-device-list=FORMAT similar to -L, but the FORMAT of > the output > can be specified: %d (device name), %v > (vendor), > %m (model), %t (type), %i (index number), > and > %n (newline) > -b, --batch[=FORMAT] working in batch mode, FORMAT is > `out%d.pnm' `out%d.tif' > `out%d.png' or `out%d.jpg' by default > depending on --format > --batch-start=# page number to start naming files with > --batch-count=# how many pages to scan in batch mode > --batch-increment=# increase page number in filename by # > --batch-double increment page number by two, same as > --batch-increment=2 > --batch-print print image filenames to stdout > --batch-prompt ask for pressing a key before scanning a > page > --accept-md5-only only accept authorization requests using > md5 > -p, --progress print progress messages > -n, --dont-scan only set options, don't actually scan > -T, --test test backend thoroughly > -A, --all-options list all available backend options > -h, --help display this help message and exit > -v, --verbose give even more status messages > -B, --buffer-size=# change input buffer size (in kB, default > 32) > -V, --version print version information > > Options specific to device `v4l:/dev/video1': > Scan Mode: > --mode Gray|Color [Gray] > Selects the scan mode (e.g., lineart, monochrome, or color). > --channel Camera 1 [inactive] > Selects the channel of the v4l device (e.g. television or > video-in. > Geometry: > -l 0..447pel (in steps of 1) [inactive] > Top-left x position of scan area. > -t 0..271pel (in steps of 1) [inactive] > Top-left y position of scan area. > -x 320..767pel (in steps of 1) [inactive] > Width of scan-area. > -y 240..511pel (in steps of 1) [inactive] > Height of scan-area. > Enhancement: > --brightness 0..255 [0] > Controls the brightness of the acquired image. > --hue 0..255 [0] > Controls the "hue" (blue-level) of the acquired image. > --color 0..255 [0] > Sets the picture's color. > --contrast 0..255 [0] > Controls the contrast of the acquired image. > --white-level 0..255 [0] > Selects what radiance level should be considered "white". > > Type ``scanimage --help -d DEVICE'' to get list of all options for > DEVICE. > > List of available devices: > v4l:/dev/video1 v4l:/dev/video0 > > [tingo@kg-u35jc ~]$ scanimage -d v4l:/dev/video1 --mode Color -T > scanimage: scanning image of size 640x480 pixels at 24 bits/pixel > scanimage: acquiring RGB frame, 8 bits/sample > scanimage: reading one scanline, 1920 bytes... PASS > scanimage: reading one byte... PASS > scanimage: stepped read, 2 bytes... PASS > scanimage: stepped read, 4 bytes... PASS > scanimage: stepped read, 8 bytes... PASS > scanimage: stepped read, 16 bytes... PASS > scanimage: stepped read, 32 bytes... PASS > scanimage: stepped read, 64 bytes... PASS > scanimage: stepped read, 128 bytes... PASS > scanimage: stepped read, 256 bytes... PASS > scanimage: stepped read, 512 bytes... PASS > scanimage: stepped read, 1024 bytes... PASS > scanimage: stepped read, 2048 bytes... PASS > scanimage: stepped read, 2047 bytes... PASS > scanimage: stepped read, 1023 bytes... PASS > scanimage: stepped read, 511 bytes... PASS > scanimage: stepped read, 255 bytes... PASS > scanimage: stepped read, 127 bytes... PASS > scanimage: stepped read, 63 bytes... PASS > scanimage: stepped read, 31 bytes... PASS > scanimage: stepped read, 15 bytes... PASS > scanimage: stepped read, 7 bytes... PASS > scanimage: stepped read, 3 bytes... PASS > > Gray doesn't work: > [tingo@kg-u35jc ~]$ scanimage -d v4l:/dev/video1 --mode Gray -T > scanimage: sane_start: Invalid argument > > More info can be found at my Fedora page[3] for this scanner. > If more info / testing / debugging is needed, I can do it. > > References: > 1) http://www.czur.com/product/ET16 > 2) https://www.indiegogo.com/projects/czur-scanner-build-your-own-dig > ital-library--2/ > 3) https://sites.google.com/site/tingox/ig_czurtek_czur_scanner_fedor > a > -- > Regards, > Torfinn Ingolfsen > Oslo, Norway > -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
