System for decoding two dimensional code and method thereof
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United States of America Patent
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Sep 15, 2015
Grant Date -
Apr 2, 2015
app pub date -
Dec 12, 2013
filing date -
Sep 29, 2013
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Abstract
Method and system for decoding a two dimensional code is disclosed. In the binarization process of a two dimensional code image, through performing a dividing operation on the two dimensional code image, each block region has a different grayscale threshold. For each block region, whether a pixel in the block region is determined as black or white is not solely based on the grayscale value of the pixel itself, but also an average grayscale value of a predetermined area set for the block region where the pixel locates. When the predetermined area in which the block region locates has a larger grayscale value as a whole, the grayscale threshold corresponding to the block region may become larger, and vice versa.
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