The rMQR Code is a rectangular two-dimensional barcode. This is easy to print in narrow space compared to conventional QR Code. This package can generate an rMQR Code image. This is implemented based on ISO/IEC 23941: Rectangular Micro QR Code (rMQR) bar code symbology specification.

You can try this online: https://rmqr.oudon.xyz .

• To read rMQR code, we can use QRQR app. However many other QR code readers may have not been supported yet.
• Please verify an image generated by this software whether it can decode correctly before use.

pip install rmqrcode 

Generate an rMQR Code image from your command line, use rmqr command:

rmqr "Text data""my_qr.png"

See the help to list the options:

➜ rmqr -h usage: rmqr [-h] [--ecc {M,H}] [--version VERSION] [--fit-strategy {min_width,min_height,balanced}] DATA OUTPUT positional arguments: DATA Data to encode. OUTPUT Output file path optional arguments: -h, --help show this help message and exit --ecc {M,H} Error correction level. (default: M) --version VERSION rMQR Code version like 'R11x139'. --fit-strategy {min_width,min_height,balanced} Strategy how to determine rMQR Code size.

Alternatively, you can also use in python scripts:

fromrmqrcodeimportrMQRimportrmqrcodedata="https://oudon.xyz"qr=rMQR.fit( data, ecc=rmqrcode.ErrorCorrectionLevel.M, fit_strategy=rmqrcode.FitStrategy.MINIMIZE_WIDTH )

The ecc parameter is an enum value of rmqrcode.ErrorCorrectionLevel to select error correction level. The following values are available:

• ErrorCorrectionLevel.M: Approx. 15% Recovery Capacity.
• ErrorCorrectionLevel.H: Approx. 30% Recovery Capacity.

The fit_strategy parameter is enum value of rmqrcode.FitStrategy to specify how to determine size of rMQR Code. The following values are available:

• FitStrategy.MINIMIZE_WIDTH: Try to minimize width.
• FitStrategy.MINIMIZE_HEIGHT: Try to minimize height.
• FitStrategy.BALANCED: Try to keep balance of width and height.

Here is an example of images generated by each fit strategies for data Test test test:

fromrmqrcodeimportQRImageimage=QRImage(qr, module_size=8) image.show() image.save("my_qr.png")

To select rMQR Code size manually, use rMQR() constructor.

fromrmqrcodeimportrMQR, ErrorCorrectionLevelqr=rMQR('R11x139', ErrorCorrectionLevel.H)

R11x139 means 11 rows and 139 columns. The following table shows available combinations.

The rMQR Code has the four encoding modes Numeric, Alphanumeric, Byte and Kanji to convert data efficiently. We can select encoding mode for each data segment separately. The following example shows how to encode data "123Abc". The first segment is for "123" in the Numeric mode. The second segment is for "Abc" in the Byte mode. We can select an encoding mode by passing the encoder_class argument to the rMQR#add_segment method. In this example, the length of bits after encoding is 47 in the case combined with the Numeric mode and the Byte mode, which is shorter than 56 in the Byte mode only.

fromrmqrcodeimportrMQR, ErrorCorrectionLevel, encoderqr=rMQR('R7x43', ErrorCorrectionLevel.M) qr.add_segment("123", encoder_class=encoder.NumericEncoder) qr.add_segment("Abc", encoder_class=encoder.ByteEncoder) qr.make()

The value for encoder_class is listed in the below table.

The rMQR.fit method mentioned above computes the optimal segmentation. For example, the data "123Abc" is divided into the following two segments.

In the case of other segmentation like "123A bc", the length of the bit string after encoding will be longer than the above optimal case.

Any suggestions are welcome! If you are interesting in contributing, please read CONTRIBUTING.

• Rectangular Micro QR Code (rMQR) bar code symbology specification: ISO/IEC 23941
• rMQR Code | QRcode.com | DENSO WAVE
• Creating a QR Code step by step

The word "QR Code" is registered trademark of DENSO WAVE Incorporated.
http://www.denso-wave.com/qrcode/faqpatent-e.html