关键词: 快速响应码, 识别, 倾斜校正, 几何校正, 取样, 自适应匹配

Abstract: The QR code acquired by camera always comes with some distortion, so it needs to be recognised to the standard QR code before decode. Aimming at the QR coderecognition, distortion and correction is analyzed and studied in this paper. Some inevitable distortion still existed based on the tilt correction and geometric correction；the traditional method can’t sample the QR code accurately. According to the problem, this paper proposes the adaptive match method, acquire the effective sampling region of QRcode by the matching rate of two adjacent pixel row（column）. Experiment shows that the method is real-time with good stability, it can sampling the QR code fast and accurately.

Key words: QR code, recognition, tilt correction, geometric correction, sampling, adaptive match