Combining a qr code and an image

A method for overlaying a QR code and an image, comprising:

• generating a QR code comprising a plurality of modules, each module containing at least one of plurality of pixels;
• allocating each module of the QR code to one of a plurality of regions;
• for modules allocated to a first region, setting a first transparency value for pixels contained in those modules;
• for modules allocated to a second region, dividing the module into an inner portion and an outer shell portion, setting a second transparency value for pixels contained in the inner portion, and setting a third transparency value for pixels contained in the outer shell portion;
• and
• overlaying the QR code and the image pixel-by-pixel using alpha-compositing according to the transparency value set for each pixel.

A non-transitory computer-readable medium comprising instructions which, in response to execution by a computer system, cause the computer system to perform a method comprising:

• generating a QR code comprising a plurality of modules, each module containing at least one of a plurality of pixels;
• allocating each module of the QR code to one of a plurality of regions;
• for modules allocated to a first region, setting a first transparency value for pixels contained in those modules;
• for modules allocated to a second region;
• dividing the module into an inner portion and an outer shell portion, setting a second transparency value for pixels contained in the inner portion, and setting a third transparency value for pixels contained in the outer shell portion;
• and
• overlaying the QR code and the image pixel-by-pixel using alpha-compositing according to the transparency value set for each pixel.