AZTEC 2D decoder from an image in C++ -- 2

I'm looking for a clean solution in C++ to decode the AZTEC 2D images from the polish vehicle identification cards (I will provide samples, but basically it's a classic AZTEC 2D image). [login to view URL] The code has to be in C++, it CANNOT use external image libraries, entire algorithm has to be coded in a single C++ file + header (it has to be portable). No OpenCV! No external libraries! No OS dependencies! (Don't waste yours and my time if you want to use those libraries) You can use ONLY standard C++ library and its modules, structures & functions. NOTHING ELSE (sorry), so NO EXTERNAL LIBRARIES & REFERENCES, NO OS SPECIFIC functions :) The only function I want is something like this: std::string Decode(const unsigned char *imageBits, const std::size_t imageWidth, const std::size_t imageHeight) { for (std::size_t y = 0, unsigned char *pixels = imageBits; y < imageHeight; ++y) { for (std::size_t x = 0; x < imageWidth; ++x) { std::size_t red, green, blue; red = pixels[0]; green = pixels[1]; blue = pixels[2]; // actual image processing // 3 bytes per pixel (it should be easily customizable) pixels += 3; } } ... return "decoded string"; } 1. It has to decode AZTEC 2D images 2. It cannot use external libraries and OS calls 3. It CAN use standard C++ library [login to view URL] Please note that the images of the AZTEC 2D might not be in very good quality and the library should handle them as well (it won't be perfect pixel by pixel image!). If you are seriously interested in this project - please send me a PM with your ideas and we can talk about the rest.