====== SANE ======

SANE - Scanner Access Now Easy



====== Sane frontends in Debian ======
  * xsane
  * xscanimage - simple GUI, scans directly to file, not possible to view scanned image
  * simple-scan - perfect to fast scanning of books, etc ,very simple GUI (photo/text) to create multi-pages documents (view of live scan)
    * [[https://gitlab.gnome.org/GNOME/simple-scan|project page]]
    * [-] brightness/contasrt adjustments doesn't work
  * skanlite - works slowly, performs some USB polling
  * gscan2pdf
 
====== Sane backend ======

<code bash>
apt-get install sane xsane sane-utils
usermod -aG scanner user
usermod -aG lp saned
</code>

Prepare udev rules to give access permission to USB:
    * Download and extract udev rules from: [[https://tw.canon/en/support/0100993201/1|ScanGear MP package]]
        * rules are inside `CONTENTS.cpio` file
        * or here: {{ :linux:80-canon_mfp2.rules.gz |}}
    * <code bash>sudo udevadm control --reload-rules</code>
    * <code bash>sudo udevadm trigger --action=add --subsystem-match=usb</code>

List scanners:

<code bash>
scanimage -L
</code>

====== Canon Lide 400 ======

<code>Bus 001 Device 003: ID 04a9:1912 Canon, Inc.</code>

===== proprietary =====

Download and install Canon's ScanGear debian package.
This package provides no compatibility with sane, it provides own tool ''scangearmp2''

===== sane =====

From sane list, it should be supported by ''sane-pixma'' driver: Backend: pixma (0.23.0)

[[http://www.sane-project.org/man/sane-pixma.5.html|sane-pixma.5]]

Move all .conf files from ''/etc/sane.d'' to speedup autodetection.
<code bash>
mkdir /etc/sane.d/OFF
mv /etc/sane.d/*.conf /etc/sane.d/OFF
</code>

Create new config:
<file ini /etc/sane.d/canon_lide400.conf>
# Autodetect the Canon CanoScan LiDE 400
usb 0x04a9 0x1912
</file>

==== Build as DEB ====

<code bash>apt-get install build-essential fakeroot devscripts</code>

=== manual download ===

Download source package from [[https://packages.debian.org/unstable/source/sane-backends]]:
  * sane-backends_1.0.31-4.dsc
  * sane-backends_1.0.31.orig.tar.gz
  * sane-backends_1.0.31-4.debian.tar.xz

<code bash>
dpkg-source -x sane-backends_1.0.31-4.dsc
cd sane-backends-1.0.31
dpkg-checkbuilddeps
sudo mk-build-deps -i
# sudo apt-get install libcurl4-gnutls-dev
dpkg -i ../sane-backends.deb
</code>


=== apt source download ===

<code bash>
apt-get source sane-backends
cd sane-backends-1.0.27
</code>

=== build ===

<code bash>
apt-get build-dep sane-backends
debuild -b -uc -us
dpkg -i ../sane-backends.deb
</code>

==== Build from source ====

Remove files installed by distribution:
<code bash>
sudo apt-get purge libsane-extras
</code>
<code bash>
apt-get install libjpeg-dev libpng-dev libpoppler-glib-dev
git clone https://gitlab.com/sane-project/backends.git
</code>
read ''INSTALL.linux'' how to install

libsane.so: undefined reference to `libusb_set_option'
Solution: check for old libusb in /usr/local/lib. Mine was from microchip IDE.


Download daily snapshoot from: http://www.sane-project.org/snapshots/
<code bash>
apt-get install libjpeg-dev libpng-dev libpoppler-glib-dev libglib2.0-dev
./configure
make
sudo make install
sudo ldconfig
</code>

Now it works:
<code bash>
$ scanimage -L
device `pixma:04A91912_413B3B' is a CANON CanoScan LiDE 400 multi-function peripheral
device `pixma:04A91912' is a CANON CanoScan LiDE 400 multi-function peripheral
</code>


===== gamma adjust =====

Scanner backends supports custom gamma table of size 1024 (10bits). Color range is from 0 to 65535.
To get raw color scan from scanner:
<code bash>
scanimage --custom-gamma=yes --gamma-table `gamma4scanimage 1.0 0 1023 1023 65535`  >image.pnm
</code>

Options are described here: [[http://www.sane-project.org/man/gamma4scanimage.1.html|gamma4scanimage.1]]

To get white paper scans:
<code bash>scanimage -p --resolution=150 --custom-gamma=yes --gamma-table `gamma4scanimage 1.0 0 700 1023 65535`  >image.pnm</code>




===== Issues =====

After restart of computer scanner stops working. 

<code bash>
$ scanimage -L
device 'pixma:04A91912' is a CANON CanoScan LiDE 400 multi-function peripheral

$ scanimage
Output format is not set, using pnm as a default.
scanimage: open of device pixma:04A91912 failed: Device busy

$ SANE_DEBUG_PIXMA=4 scanimage
Output format is not set, using pnm as a default.
[sanei_debug] Setting debug level of pixma to 4.
[pixma] pixma is compiled with pthread support.
[pixma] pixma version 0.24.1
[pixma] pixma_collect_devices() found CanoScan LiDE 400 at libusb:001:004
[pixma] pixma_find_scanners() found 1 devices
[pixma] pixma_collect_devices() found CanoScan LiDE 400 at libusb:001:004
[pixma] pixma_open(): CanoScan LiDE 400
[pixma] pixma_connect() failed EBUSY
[pixma] pixma_open() failed EBUSY
[pixma] pixma_close(): CanoScan LiDE 400
scanimage: open of device pixma:04A91912 failed: Device busy

</code>

Download latest backend snapshot, compile and reinstall - doesn't help.

strace:
<code strace>
openat(AT_FDCWD, "/dev/bus/usb/001/007", O_RDWR|O_CLOEXEC) = 9
ioctl(9, USBDEVFS_GET_CAPABILITIES, 0x56212f5f4098) = 0
ioctl(9, USBDEVFS_CLAIMINTERFACE, 0x7ffff58ba40c) = -1 EBUSY (Device or resource busy)
close(9)                                = 0
</code>

**SOLUTION:**
<code bash>
sudo apt-get remove scanbd
</code>

===== Others =====

Epson driver: [[https://support.epson.net/linux/en/imagescanv3.php|Image Scan v3]]