Method and system for binarization of two dimensional code image

A system for binarizing a two dimensional code image, the system comprising:

• an image dividing module, for dividing the two dimensional code image into a plurality of block regions;
• a grayscale value obtaining module, for obtaining grayscale values of all pixels in each block region, and obtaining a grayscale value for each block region according to the grayscale values of all the pixels;
• a grayscale threshold obtaining module, for determining for each block region a grayscale threshold of the block region according to an average grayscale value of a predetermined area where the block region locates;
• a binarization module, for binarizing pixels in the block region according to a grayscale threshold corresponding to each block region.

A system for binarizing a two dimensional code image, the system comprising a processor, wherein the process is configured to:

• divide the two dimensional code image into a plurality of block regions;
• obtain grayscale values of all pixels in each block region, and obtaining a grayscale value for each block region according to the grayscale values of all the pixels;
• determine for each block region a grayscale threshold of the block region according to an average grayscale value of a predetermined area where the block region locates;
• binarize pixels in the block region according to a grayscale threshold corresponding to each block region.