qrtool-decode(1)
NAME
qrtool-decode - detect and decode a QR code
DESCRIPTION
This command detects and decodes a QR code. By default, the result will be output to stdout.
qrtool dec and qrtool d are aliases for this command.
POSITIONAL ARGUMENTS
- IMAGE
Input image file. If IMAGE is not specified, or if "-" is specified, the image will be read from stdin. Supported raster image formats are based on the formats supported by the image crate. The format of IMAGE is determined based on the extension or the magic number if possible. If the format cannot be determined, use --type. Note that the SVG image is rasterized before scanning.
OPTIONS
- -t, --type FORMAT
The format of the input. If FORMAT is not specified, the format is determined based on the extension or the magic number.
- The possible values are:
- bmp
Windows Bitmap.
- dds
DirectDraw Surface.
- farbfeld
Farbfeld.
- gif
Graphics Interchange Format.
- hdr
Radiance RGBE.
- ico
ICO file format. This value also includes the CUR file format.
- jpeg
JPEG.
- openexr
OpenEXR.
- png
Portable Network Graphics.
- pnm
Portable Anymap Format.
- qoi
Quite OK Image Format.
- svg
Scalable Vector Graphics. This value also includes the gzip-compressed SVG image.
- tga
Truevision TGA.
- tiff
Tag Image File Format.
- webp
WebP.
- --verbose
Also print the metadata. It is output to stderr. This option conflicts with --metadata.
- --metadata
Print only the metadata. It is output to stderr. This option conflicts with --verbose.
- -h, --help
Print help message. The short flag (-h) will print a condensed help message while the long flag (--help) will print a detailed help message.
- -V, --version
Print version number. The long flag (--version) will also print the copyright notice, the license notice and where to report bugs.
EXIT STATUS
- 0
Successful program execution.
- 1
An error occurred.
- 2
An error occurred while parsing command-line arguments.
- 65
The input data was incorrect in some way.
- 66
An input file did not exist or was not readable.
- 69
A service is unavailable.
- 71
An operating system error has been detected.
- 74
An error occurred while doing I/O on some file.
- 77
You did not have sufficient permission to perform the operation.
EXAMPLES
- Detect and decode a QR code from the given image:
$ qrtool decode input.png
- Decode a QR code from the given WebP image:
$ qrtool decode -t webp input.webp
- Also print the metadata when decoding a QR code:
$ qrtool decode --verbose input.qoi
COPYRIGHT
Copyright © 2022-2024 Shun Sakai
This program is distributed under the terms of either the Apache License 2.0 or the MIT License.
This manual page is distributed under the terms of the Creative Commons Attribution 4.0 International Public License.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.