This Python script allows you to encode data into a QR code image and decode the QR code to retrieve the original data. It also provides functionality to merge three QR codes encoded with different colors into a single colored QR code image.

• qrcode
• Pillow (PIL)
• subprocess
• Zbar(https://zbar.sourceforge.net)

You can install the dependencies using pip: pip install qrcode pillow

To encode data into a QR code image, use the enc function with the following parameters:

enc(data_1, data_2, data_3, output_filename, version)

• data_1, data_2, data_3: Data strings to be encoded into the three channels of the QR code.
• output_filename: Filename for the output QR code image.
• version: Version of the QR code (numeric value).

Example:

enc('hello', 'world', '123', 'output.png', ver=4)

To decode a QR code image, use the dec function with the filename of the input image:

dec(input_filename)

This function returns a tuple containing the decoded data from the three channels of the QR code.

Example:

decoded_data = dec('output.png') print(decoded_data)

The main function demonstrates an example usage of encoding and decoding data.