Patent ID: 11908108
Assignee: SIGMASTAR TECHNOLOGY LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. An image correction method, comprising:
performing a feature point search on a quick response (QR) code image to determine a plurality of feature points in the OR code image;
dividing a coded area of the OR code image into a plurality of sub-regions according to the feature points; and
determining a compensation vector for each of the sub-regions according to the feature points corresponding to each of the sub-regions, and compensating and correcting each of the sub-regions according to the compensation vector of each of the sub-regions to obtain a corrected image,
wherein the step of dividing a coded area of the QR code image into a plurality of sub-regions according to the feature points comprises:
dividing the coded area into the sub-regions according to the feature points by using a constraint of regarding at least one of the feature points as a vertex of one of the sub-regions, and
wherein the step of determining a compensation vector for each of the sub-regions according to the feature points corresponding to each of the sub-regions, and compensating and correcting each of the sub-regions according to the compensation vector of each of the sub-regions to obtain a corrected image comprises:
determining a horizontal unit compensation vector in a horizontal direction and a vertical unit compensation vector in a vertical direction of each of the sub-regions according to the feature points corresponding to each of the sub-regions; and
compensating and correcting each of the sub-regions according to the horizontal unit compensation vector and the vertical unit compensation vector of each of the sub-regions.