Linux でスキャナ（Canon CanoScan LiDE 400）を使う

❯ pacman -Si sane
リポジトリ             : extra
名前                   : sane
バージョン             : 1.2.1-5
説明                   : Scanner Access Now Easy
アーキテクチャ         : x86_64
URL                    : http://www.sane-project.org/
ライセンス             : GPL2
グループ               : なし
提供                   : libsane.so=1-64
依存パッケージ         : bash  cairo  gcc-libs  glibc  libpng  libieee1284  net-snmp  v4l-utils  avahi  libavahi-client.so=3-64  libavahi-common.so=3-64  curl  libcurl.so=4-64  glib2  libgobject-2.0.so=0-64  libgphoto2  libgphoto2.so=6-64
                         libgphoto2_port.so=12-64  libjpeg-turbo  libjpeg.so=8-64  libtiff  libtiff.so=6-64  libusb  libusb-1.0.so=0-64  libxml2  libxml2.so=2-64  poppler-glib  libpoppler-glib.so=8-64  systemd-libs  libsystemd.so=0-64
提案パッケージ         : sane-airscan: for scanners working in driverless mode
衝突パッケージ         : なし
置換パッケージ         : なし
ダウンロード容量       : 3.70 MiB
インストール容量       : 18.29 MiB
パッケージ作成者       : David Runge <[email protected]>
ビルド日時             : 2023年09月02日 22時23分18秒
検証方法               : MD5 Sum  SHA-256 Sum  署名

❯ pacman -Ql sane | grep udev
sane /usr/lib/udev/
sane /usr/lib/udev/hwdb.d/
sane /usr/lib/udev/hwdb.d/20-sane.hwdb
sane /usr/lib/udev/rules.d/
sane /usr/lib/udev/rules.d/65-sane.rules
sane /usr/lib/udev/rules.d/66-saned.rules

❯ lsusb -d 04a9:1912
Bus 004 Device 002: ID 04a9:1912 Canon, Inc. LiDE 400

❯ scanimage --list-devices
device `v4l:/dev/video0' is a Noname HD Pro Webcam C920 virtual device
device `pixma:04A91912_4BB738' is a CANON CanoScan LiDE 400 multi-function peripheral

❯ scanimage --device "pixma:04A91912_4BB738" --help
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|pdf  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
                           This option is incompatible with --output-file.    --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
-o, --output-file=PATH     save output to the given file instead of stdout.
                           This option is incompatible with --batch.
-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
Output format is not set, using pnm as a default.

Options specific to device `pixma:04A91912_4BB738':
    --resolution auto||75|150|300|600|1200|2400|4800dpi [75]
        Sets the resolution of the scanned image.
    --mode auto|Color|Gray|48 bits color|16 bits gray|Lineart [Color]
        Selects the scan mode (e.g., lineart, monochrome, or color).
    --source Flatbed [Flatbed]
        Selects the scan source (such as a document-feeder). Set source before
        mode and resolution. Resets mode and resolution to auto values.
    --button-controlled[=(yes|no)] [no]
        When enabled, scan process will not start immediately. To proceed,
        press "SCAN" button (for MP150) or "COLOR" button (for other models).
        To cancel, press "GRAY" button.
    --custom-gamma[=(auto|yes|no)] [no]
        Determines whether a builtin or a custom gamma-table should be used.
    --gamma-table auto|0..65535,... [inactive]
        Gamma-correction table with 1024 entries. In color mode this option
        equally affects the red, green, and blue channels simultaneously (i.e.,
        it is an intensity gamma table).
    --gamma auto|0.299988..5 [2.2]
        Changes intensity of midtones
    -l auto|0..216.069mm [0]
        Top-left x position of scan area.
    -t auto|0..297.011mm [0]
        Top-left y position of scan area.
    -x auto|0..216.069mm [216.069]
        Width of scan-area.
    -y auto|0..297.011mm [297.011]
        Height of scan-area.
    --button-update [advanced]
        Update button state
    --threshold auto|0..100% (in steps of 1) [inactive]
        Select minimum-brightness to get a white point
    --threshold-curve auto|0..127 (in steps of 1) [inactive]
        Dynamic threshold curve, from light to dark, normally 50-65
    --adf-wait auto|0..3600 (in steps of 1) [inactive]
        When set, the scanner waits up to the specified time in seconds for a
        new document inserted into the automatic document feeder.
    --calibrate auto|Once|Always|Never [Once]
        When to perform scanner calibration. If you choose "Once" it will be
        performed a single time per driver init for single page scans, and for
        the first page for each ADF scan.

Type ``scanimage --help -d DEVICE'' to get list of all options for DEVICE.

List of available devices:
    v4l:/dev/video0 pixma:04A91912

❯ scanimage --device "pixma:04A91912_4BB738" --format=jpeg --output-file out.jpeg --progress
Progress: 100.0%
❯ ls -lh out.jpeg
-rw-r--r-- 1 shida shida 51K 12月 27 12:55 out.jpeg

❯ exiftool example.jpeg 
ExifTool Version Number         : 12.70
File Name                       : example.jpeg
Directory                       : .
File Size                       : 109 kB
File Modification Date/Time     : 2023:12:27 15:15:52+09:00
File Access Date/Time           : 2023:12:27 15:15:52+09:00
File Inode Change Date/Time     : 2023:12:27 15:15:52+09:00
File Permissions                : -rw-r--r--
File Type                       : JPEG
File Type Extension             : jpg
MIME Type                       : image/jpeg
JFIF Version                    : 1.01
Resolution Unit                 : inches
X Resolution                    : 75
Y Resolution                    : 75
Image Width                     : 638
Image Height                    : 877
Encoding Process                : Baseline DCT, Huffman coding
Bits Per Sample                 : 8
Color Components                : 3
Y Cb Cr Sub Sampling            : YCbCr4:2:0 (2 2)
Image Size                      : 638x877
Megapixels                      : 0.560

❯ scanimage --device "pixma:04A91912_4BB738" --help
Usage: scanimage [OPTION]...

〜略〜

Options specific to device `pixma:04A91912_4BB738':
    --resolution auto||75|150|300|600|1200|2400|4800dpi [75]
        Sets the resolution of the scanned image.

❯ scanimage --device "pixma:04A91912_4BB738" --help

〜略〜

Options specific to device `pixma:04A91912_4BB738':

〜略〜

    -l auto|0..216.069mm [0]
        Top-left x position of scan area.
    -t auto|0..297.011mm [0]
        Top-left y position of scan area.
    -x auto|0..216.069mm [216.069]
        Width of scan-area.
    -y auto|0..297.011mm [297.011]
        Height of scan-area.

❯ scanimage --device "pixma:04A91912_4BB738" --format=jpeg -l 0 -t 0 -x auto -y auto --output-file file.jpeg --resolution 300 --progress
scanimage: option --x: bad option value (rest of option: auto)

❯ PAGER=cat man scanimage

〜略〜
       -l 0..218mm [0]
              Top-left x position of scan area.

              The  description above shows that option -l expects an option value in the range from 0 to 218 mm.  The value in square
              brackets indicates that the current option value is 0 mm. Most backends provide similar geometry options for top-left y
              position (-t), width (-x) and height of scan-area (-y).
〜略〜

#!/bin/bash

set -eu

show_help() {
    cat <<EOF
Usage: $0 [OPTIONS]

This script is a wrapper for the scanimage command at Canon CanoScan LiDE 400.

Options:
  --device, -d DEVICE     Set the scan device. [Required]
  --output-file FILE      Set the output file name. [Required]
  --format FORMAT         Set the output format (pnm, tiff, png, jpeg, pdf). [jpeg]
  --resolution DPI        Set the scan resolution in dots per inch (auto, 75, 150, 300, 600, 1200, 2400, 4800). [300]
  --size, -s SIZE         Set the scan size (a4, a5, b5, hagaki, hagaki2). [a4]
  --progress              Show progress during the scan.
  --list-devices, -L      List available scan devices.
  --help                  Show this help message.

Example:
  $0 --device 'your_device_name' --output-file output.jpeg --resolution 300 --size a4 --progress
EOF
}

list_devices() {
    echo "Available scan devices:"
    scanimage -L
}

if ! command -v scanimage > /dev/null; then
    echo "Error: scanimage command not found. Please install SANE."
    exit 1
fi

# default
device=""
output_file=""
format="jpeg"
resolution="300"
size="a4"
progress=""

# parse options
while [[ "$#" -gt 0 ]]; do
    case $1 in
        --device|-d)
            device="$2";
            shift ;;
        --output-file)
            output_file="$2";
            shift ;;
        --format)
            case $2 in
                pnm|tiff|png|jpeg|pdf) format="$2" ;;
                *) echo "Error: Unsupported format. Supported formats are: pnm, tiff, png, jpeg, pdf."; exit 1 ;;
            esac
            shift
            ;;
        --resolution)
            case $2 in
                auto|75|150|300|600|1200|2400|4800) resolution="$2" ;;
                *) echo "Error: Unsupported DPI. Supported DPI values are: auto, 75, 150, 300, 600, 1200, 2400, 4800."; exit 1 ;;
            esac
            shift ;;
        --size|-s)
            case $2 in
                a4) size="210x297" ;;
                a5) size="148x210" ;;
                b5) size="182x257" ;;
                hagaki) size="100x148" ;;
                hagaki2) size="200x148" ;;
                *) echo "Error: Unsupported size. Supported sizes are: a4, a5, b5, hagaki, hagaki2."; exit 1 ;;
            esac
            shift
            ;;
        --progress)
            progress="--progress" ;;
        --list-devices|-L)
            list_devices;
            exit 0 ;;
        --help)
            show_help;
            exit 0 ;;
        *)
            echo "Unknown option: $1";
            exit 1 ;;
    esac
    shift
done

if [ -z "$device" ]; then
    echo "Error: --device option is required."
    exit 1
fi

if [ -z "$output_file" ]; then
    echo "Error: --device option is required."
    exit 1
fi

if [ -e "$output_file" ]; then
    echo "Error: Output file '$output_file' already exists."
    exit 1
fi


# build command
scanimage_cmd="scanimage"

if [ -n "$device" ]; then
    scanimage_cmd="$scanimage_cmd --device $device"
fi

if [ -n "$output_file" ]; then
    scanimage_cmd="$scanimage_cmd --output-file $output_file"
fi

if [ -n "$format" ]; then
    scanimage_cmd="$scanimage_cmd --format $format"
fi

if [ -n "$resolution" ]; then
    scanimage_cmd="$scanimage_cmd --resolution $resolution"
fi

if [ -n "$size" ]; then
    x=$(echo $size | cut -d'x' -f1)
    y=$(echo $size | cut -d'x' -f2)
    scanimage_cmd="$scanimage_cmd -l 0 -t 0 -x $x -y $y"
fi

scanimage_cmd="$scanimage_cmd $progress"


echo "Running: $scanimage_cmd"
eval $scanimage_cmd

❯ ./scan-lide400 -d pixma:04A91912_4BB738 --output-file script-test.jpeg --size a5 --progress
Running: scanimage --device pixma:04A91912_4BB738 --output-file script-test.jpeg --format jpeg --resolution 300 -l 0 -t 0 -x 148 -y 210 --progress
Progress: 100.0%