Efficient robust seal detection and character recognition method based on circle detection

• Main Authors: QU XIANGYAN, LEE JIN, GOU GAOPENG, YU JING, XIONG GANG
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; PHYSICS

The invention discloses an efficient robust seal detection and character recognition method based on circle detection. The method comprises the following steps: 1) obtaining a candidate seal area from a to-be-detected picture based on a circle detection technology; 2) straightening the candidate seal area, and performing character recognition after the annular characters in the candidate seal area are leveled; and 3) filtering the candidate seal area by using the symmetry and character characteristics of the picture in the seal to obtain a seal area in the picture to be detected, and outputting characters in the seal area. The method is higher in robustness, and can detect a blurred color image, a black and white image, a seal containing a plurality of seals, an incomplete and distorted seal in an environment with inconsistent light; the minimum editing distance of character recognition is superior to that of other platforms for the seal with serious character distortion; under the condition of not depending