Patent ID: 9070034
Filing Date: 2015-06-30
Classification: G06K

Abstract:
1. A method for correcting a QR code image, the method comprising: determining an initial coordination system where the QR code image locates and a correction coordination system where a corrected image locates, wherein each point in the correction coordination system corresponds to a point in the initial coordination system; obtaining coordinates of a central point of each detection pattern and a locating point in the initial coordinate system and the correction coordinate system respectively; obtaining conversion coefficients according to the coordinates of the central point of each detection pattern and the coordinates of the locating point in the initial coordinate system and the correction coordinate system; finding out, for each point in the correction coordinate system, a module of the QR code image in which its corresponding point in the initial coordinate system locates according to the conversion coefficients, and assigning the grayscale value of that module to the point to realize the correction of the QR code image, wherein the central point of a correction pattern is selected as the locating point.