Game 17
We have a QR code image that needs to be processed and decoded. Start by enhancing the image with ImageMagick:
$ convert qr.png -threshold 85% out.png$ convert out.png -background black -alpha remove -alpha off oo.pngThe note describes manually restoring the three QR finder patterns in an image editor. It does not retain the pattern assets, module size, placement coordinates, or repaired image. Save the repaired result as repaired.png; decoding oo.png would otherwise test the pre-repair image. Exact repair parameters cannot be reconstructed from the retained commands alone.
Once repaired, decode the QR code with zbarimg:
$ zbarimg repaired.pngThis yields the flag:
Good Job! Congraturation! AuthKey is YouAreQRCodeMaster~!YouAreQRCodeMaster~!