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

Claim 0:
1. 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 QR code image;
dividing a coded area of the QR 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 performing a feature point search on a QR code image to determine a plurality of feature points in the QR code image comprises:
searching the QR code image to find a plurality of finder patterns therein; and
finding and determining the feature points according to the finder patterns,
wherein the step of finding and determining the feature points according to the finder patterns comprises:
searching each of the finder patterns to find a plurality of vertices close to the coded area therein as the feature points, and searching a correction reference pattern in the QR code image to find a center point therein as one of the feature points, and
wherein the step of searching each of the finder patterns to find a plurality of vertices close to the coded area therein as the feature points comprises:
searching along a search direction by using a center point of each of the finder patterns as a starting point to determine an outer edge point of each of the finder patterns, and searching along outer edges of each of the finder patterns by using the outer edge point as a starting point of each finder pattern to determine the vertices.