vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

2026-08-22 00:11:13 +08:00
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+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Tencent is pleased to support the open source community by making WeChat QRCode available.
+// Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
+
+#ifndef __OPENCV_WECHAT_QRCODE_HPP__
+#define __OPENCV_WECHAT_QRCODE_HPP__
+#include "opencv2/core.hpp"
+/** @defgroup wechat_qrcode WeChat QR code detector for detecting and parsing QR code.
+ */
+namespace cv {
+namespace wechat_qrcode {
+//! @addtogroup wechat_qrcode
+//! @{
+/**
+ * @brief  WeChat QRCode includes two CNN-based models:
+ * A object detection model and a super resolution model.
+ * Object detection model is applied to detect QRCode with the bounding box.
+ * super resolution model is applied to zoom in QRCode when it is small.
+ *
+ */
+class CV_EXPORTS_W WeChatQRCode {
+public:
+    /**
+     * @brief Initialize the WeChatQRCode.
+     * It includes two CNN-based models in ONNX format:
+     * a detector model and a super resolution model.
+     *
+     * @param detector_model_path onnx model file path for the detector
+     * @param super_resolution_model_path onnx model file path for the super resolution model
+     */
+    CV_WRAP WeChatQRCode(const std::string& detector_model_path = "",
+                         const std::string& super_resolution_model_path = "");
+    ~WeChatQRCode(){};
+
+    /**
+     * @brief  Both detects and decodes QR code.
+     * To simplify the usage, there is a only API: detectAndDecode
+     *
+     * @param img supports grayscale or color (BGR) image.
+     * @param points optional output array of vertices of the found QR code quadrangle. Will be
+     * empty if not found.
+     * @return list of decoded string.
+     */
+    CV_WRAP std::vector<std::string> detectAndDecode(InputArray img, OutputArrayOfArrays points = noArray());
+
+    /**
+    * @brief set scale factor
+    * QR code detector use neural network to detect QR.
+    * Before running the neural network, the input image is pre-processed by scaling.
+    * By default, the input image is scaled to an image with an area of 160000 pixels.
+    * The scale factor allows to use custom scale the input image:
+    * width = scaleFactor*width
+    * height = scaleFactor*width
+    *
+    * scaleFactor valuse must be > 0 and <= 1, otherwise the scaleFactor value is set to -1
+    * and use default scaled to an image with an area of 160000 pixels.
+    */
+    CV_WRAP void setScaleFactor(float _scalingFactor);
+
+    CV_WRAP float getScaleFactor();
+
+protected:
+    class Impl;
+    Ptr<Impl> p;
+};
+
+//! @}
+}  // namespace wechat_qrcode
+}  // namespace cv
+#endif  // __OPENCV_WECHAT_QRCODE_HPP__