METHOD AND SYSTEM FOR DECODING QR CODE BASED ON WEIGHTED AVERAGE GREY METHOD

摘要

The present invention provides a method and system for decoding a QR code based on a weighted average grey method. The method comprises: partitioning a received QR code image as a bit region of bit data; pre-setting an offset threshold, and moving four original boundary lines of the bit region outwards each for a distance of the offset threshold to obtain four pre-set boundary lines; calculating an average grey value of the bit region according to a weighted average method by using the overlapping area of pixel points in the four pre-set boundary lines and the bit region as a weight; and binarizing the QR code image according to the average grey value of the bit region, and decoding the binarized QR code image. The influence on an average grey value of a bit region caused by pixel points partially overlapped with the bit region is taken into full consideration, and the decoding accuracy rate and success rate are high.