QR Code Pattern Recognition

QR two-dimensional barcode pattern recognition effectively identifies barcode pattern information through image processing algorithms

QR Code as a High-Speed, Omni-Directional Recognizable 2D Barcode

QR Code, as a high-speed, omni-directionally recognizable two-dimensional barcode, has been applied across various industries and holds significant development potential. This study addresses challenges in QR code image recognition, including image noise interference, partial QR code presence in captured images, tilt, and geometric distortion. It proposes an enhanced median filtering approach for noise removal, utilizes QR code symbol characteristics for positioning and tilt correction through rotation, and employs control point transformation with bilinear interpolation for geometric correction in mildly distorted images. Experimental results demonstrate that the proposed method is simple yet effective, significantly improving barcode recognition accuracy.