File & QR-Code Converter

Introduction

For some reason, some file (such as document, script, or pictures) cannot be copied from any computer (for example, from companies, organizations or government), however, this project allows us to export small file through QR Code:)

Unfortunately, it can support only one file of conversion (be sure to pack all files in only one file).

Only small files are allowed since one QR Code can only store as much as 6kb data (maximum of 65536 qr-code are supported).

It is safe to use since multiple way of file checking will ensure NO DATA WILL LOSS from any conversion.

Taking pictures

Use camera with 1 to 1 ratio of pictures when taking pictures from screen can achieve better result.

Requirement

The python library of pillow, segno, pypng, zbar and pyzbar are required. The system library of libzbar is also needed (Ubuntu: apt-get install libzbar-dev).

Usage

Argument

• --input: the input file of converting to qr-code, or folders of images to decode.
• --output: the output folder for qr-code, or target file to export from qr-code.
• --chunk_size: the number of byte for each data to store for each qr-code (manipulate this number as long as the program will not break).
• --cpu_number: the number of CPU to process files.
• --quality: error allowance, L, M, Q, H from low to high.
• --black_white: the black and white regular qr-code if have, otherwise the RGB color mode.
• --index_byte: the number of byte for indexes encoding, default is 2 (danger!! user may not know this number).

Demo

Type python convert.py -i demo -o mozart_11.mid, it decodes one or multiple qr-code images from the folder demo to the mid music file -- mozart_11.mid is the Mozart Piano Sonata No.11 (first part) I played.

Of course, the script python convert.py -o demo -i mozart_11.mid is the reverse way of encoding back from the file to multiple qr-code images.

Since the file name are also stored in the qr-code, for the decoding part, if the output is the folder, the program will restore the file within this folder. Namely, type python convert.py -i demo -o <folder>, the mozart_11.mid file will appear within <folder>. If output is not defined, a new folder with name pattern #__[<name>]__# will appear at the same level of the input path.

More Method

More methods in ./m2 and ./m3.

Disclaimer

This project can only be used under the law of the state or country from any user.

However, it can be used for research purposes without penalty.