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生成zxing

下载zxing，zxing-cpp-master
https://github.com/zxing-cpp/zxing-cpp

Cmake生成项目，点Generate，把OpenCV_DIR修改了，NameValue没有报红就点Generate。然后点Open Project打开项目。

打开项目后，右击解决方案属性页，勾选后再生成解决方案。


全部生成成功后，新建一个文件夹zxing-cpp，下面有include和lib文件夹，include下再放个zxing文件夹。

复制D:/zxing-cpp-master-build/core/Debug/ZXing.lib到D:\zxing-cpp\lib文件夹下。
复制D:\zxing-cpp-master\core\src下的所有文件到D:\zxing-cpp\include\zxing文件夹下。

配置项目

新建一个项目，配置属性页
C++ ->常规-> 附加包含目录 D:\zxing-cpp\include
链接器 ->常规 -> 附加库目录 D:\zxing-cpp\lib
链接器 ->输入-> 附加依赖项 ZXing.lib
复制D:\zxing-cpp-master-build\core\Debug\ZXing.dll到 自己项目的Debug目录下（ …\TestZxing\x64\Debug）。

测试代码

已有opencv、zxing的环境下：

#include <opencv2/opencv.hpp>
#include <zxing/ReadBarcode.h>using namespace ZXing;
using namespace cv;
struct decodeResStruct {Point pt1, pt2, pt3, pt4;String strQRDecode;decodeResStruct() {}decodeResStruct(Point pt1_, Point pt2_, Point pt3_, Point pt4_, String strQRDecode_) {pt1 = pt1_;pt2 = pt2_;pt3 = pt3_;pt4 = pt4_;strQRDecode = strQRDecode_;}
};std::vector<decodeResStruct> resDecoded;//结果集int main() {Mat src = imread("D:/test.bmp");auto fmt = ImageFormat::None;switch (src.channels()) {case 1: fmt = ImageFormat::Lum; break;case 3: fmt = ImageFormat::BGR; break;case 4: fmt = ImageFormat::BGRX; break;}ZXing::DecodeHints hints;ZXing::BarcodeFormats format = BarcodeFormat::QRCode;hints.setFormats(format);ImageView image{ src.data, src.cols, src.rows, fmt};ZXing::Results z_results = ReadBarcodes(image, hints);for (auto&& result : z_results) {const ZXing::Position pos = result.position();Point pt1 = { (int)pos[0].x,(int)pos[0].y };Point pt2 = { (int)pos[1].x,(int)pos[1].y };Point pt3 = { (int)pos[2].x,(int)pos[2].y };Point pt4 = { (int)pos[3].x,(int)pos[3].y };decodeResStruct stru = decodeResStruct{ pt1, pt2, pt3, pt4, result.text()};resDecoded.push_back(stru);}for (auto one : resDecoded) {line(src, one.pt1, one.pt2, Scalar(0, 255, 0), 2);line(src, one.pt2, one.pt3, Scalar(0, 255, 0), 2);line(src, one.pt3, one.pt4, Scalar(0, 255, 0), 2);line(src, one.pt4, one.pt1, Scalar(0, 255, 0), 2);putText(src, one.strQRDecode, one.pt1, 0, 0.5, Scalar(255, 0, 0), 2);}imshow("res", src);waitKey();
}