METHOD FOR DECODING MATRIX TYPE TWO DIMENSIONAL CODE

摘要

Provided is a method for decoding a matrix type two dimensional code. A decoded matrix type two dimensional code image is a matrix type two dimensional code symbol jointing code matrix combined with a plurality of same unit code patterns; The image obtained by scanning need not contain a single complete unit code pattern. The decoding procedure thereof comprises: obtaining a binarization image of a matrix type two dimensional code symbol joining code matrix to be decoded; locating the location of each data point in the unit code pattern to which it is subordinate to restore a complete unit code pattern; and then decoding same. The present invention only needs an area which is twice as large as that of the unit code pattern when decoding under the circumstance that the condition for scanning and graphing is the worst but the decoding method in the prior art at least needs an area which is six times as large as that of the unit code pattern under the worst condition for scanning and graphing. In addition the oblique situation of the code pattern image in the present invention can also be applicable the operation quantity is smaller than that of the prior art and the resources are saved.