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Simple QR Code decoder script written in Python (for educational purposes)
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QR Decoder Supports QR code versions 1-40 containing numeric, alphanumeric, or 8-bit byte data. BCH and Reed-Solomon error correction not implemented. Note: the image processing is rudimentary. It detects the image origin by the first black pixel encountered starting from the top-left corner. It detects the bit pixel width by doing a horizontal and vertical scan from the origin and finding the smallest run of black pixels. It detects the image width by finding the last black pixel on a horizontal scan starting from the origin, and the QR size by dividing this width by the bit pixel width. This is suitable for online generated pixel perfect QR codes, but may need some help (pre-processing) for less perfect images. See qrd-test.txt for a sample output.