System for decoding two dimensional code and method thereof

A system for decoding a two dimensional code, the system comprising:

• a binarization module for performing a binarization process on a two dimensional code image to obtain a binary image, further comprising:
• a dividing unit for dividing the two dimensional code image into a plurality of block regions;
• a grayscale value obtaining unit 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 unit for determining, a grayscale threshold for each block region according to an average grayscale value of a predetermined area where the block region locates;
• a binary image obtaining unit for binarizing pixels in the block region to obtain a binary image, according to a grayscale threshold corresponding to each block region;
• a decoding module for decoding the binary image to obtain information content contained in the two dimensional code.

A system for decoding two dimensional code, the system comprising;

• a processor, the processor is configured to
• performing a binarization process on a two dimensional code image to obtain a binary image, the binarization process comprising:
• dividing the two dimensional code image into a plurality of block regions;
• 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;
• determining, a grayscale threshold for each block region according to an average grayscale value of a predetermined area where the block region locates;
• binarizing pixels in the block region to obtain a binary image, according to a grayscale threshold corresponding to each block region;
• decoding the binary image to obtain information content contained in the two dimensional code.