1.24 [12.09.2022]

[sbrunner]

What's new in version 1.24

• Use pngquant instead of JPEG
• Add QR code content
• Support of double-sided roller scanner

Use pngquant instead of JPEG

In version 1.23 we use exiftool to optimize the PDF, but it sometimes transforms the images in ugly JPEG.
In version 1.24 we can use pngquant to quantize the PNG.

By default, none of them are activated, to activate pngquant, use the args run_exiftool and set it to true.
To use pngquant set the args run_pngquant to true, you can also add pngquant_options, by default
it uses: ["--skip-if-larger", "--speed=1", "--strip", "--quality=0-32"].

Add QR code content

In version 2.14 a new page is added at the end of your PDF with the content of all the detected codes.
You can use all the environment variable that starts with SCAN_CODES_ to configure it, see the README.md.

And to be able to scan the (QR)Codes from other sources, I add a new folder /scan-codes.

Note that in the QRbill there are some important empty lines, that didn't work with PDF copy, then I add a pipe in those lines, and
you can run scan --convert-clipboard that will scan your clipboard to do the inverse transform.

Support of double-sided roller scanner

I buy a new scanner: HP Scanjet Pro 2000 s2
And it didn't work out of the box, then I do the following changes:

• Be able to scan to a tiff file (directly get the DPI from the TIFF file).
• Be able to use the double side mode.
• Be able to have a non-white background.

The configuration I use with my new scanner:

scanimage_arguments:
  # scanimage --list-devices
  - --device=airscan:e0:HP ScanJet Pro 2000 s2 (USB)
  - --format=tiff
  - --mode=color
  # 75|150|200|240|300|400|500|600
  - --resolution=400
  - -y
  - '309'

# New option
type: tiff

# New section
modes:
  adf:
    scanimage_arguments:
      - --source=ADF
  double:
    scanimage_arguments:
      - --source=ADF Duplex
    auto_bash: false
    rotate_even: false
  one:
    scanimage_arguments:
      - --source=ADF
      - --batch-count=1

default_args:
  # New Arguments
  auto_mask: {}
  auto_cut: {}
  run_pngquant: true
  cut_white: 200
  
  # The DPI isn't required anymore with TIFF files

Other changes

• Update the deskew and add new option and debug images
• The Creator metadata is fill with the Scan to Paperless image date and tesseract version (e.-g. Scan to Paperless 2022-08-13 03:47:48, Tesseract 4.1.1)
• Now we can extend a configuration with another.
• The progress mode is improved
• The experimental mode is completely removes
• The near black and near white colors are set to black and white respectively, see cut_black and cut_white in the documentation

Don't miss the documentation

• The environment variable present in the README.md.
• The configuration (and process) documentation.
• The full changelog