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试了下QZXing这个识别二维码库，下载地址：百度网盘 CSDN下载链接 本站下载连接
例子是打开当前目录下的图片二维码进行识别
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#include "widget.h"
#include "ui_widget.h"
#include "QZXing.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(
new
Ui::Widget)
{
ui->setupUi(
this
);
QImage img;
qDebug()<<img.load(
"./TestPics/mm_facetoface_coll.png"
);
qDebug()<<img.width()<<img.height();
QZXing zxing;
qDebug()<<zxing.decodeImage(img);
}
Widget::~Widget()
{
delete
ui;
}
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