【OpenCV】车牌识别检测

一：EasyPR开源库 ubuntu下配置

二：车牌识别UI绘制

三：车牌识别代码实现

四：车牌识别成果展示

一：EasyPR开源库 ubuntu下配置

1.确定好工程路径

如/root/Qt_workspace/omo220315_001

2.将/opt/EasyPR/model 的 model文件夹拷贝到上述的Qt工程目录下

3.修改Qt pro

注意点：需要加 \ 再加配置文件

   /opt/EasyPR/src/core/chars_identify.cpp \/opt/EasyPR/src/core/chars_recognise.cpp \/opt/EasyPR/src/core/chars_segment.cpp \/opt/EasyPR/src/core/core_func.cpp \/opt/EasyPR/src/core/feature.cpp \/opt/EasyPR/src/core/params.cpp \/opt/EasyPR/src/core/plate_detect.cpp \/opt/EasyPR/src/core/plate_judge.cpp \/opt/EasyPR/src/core/plate_locate.cpp \/opt/EasyPR/src/core/plate_recognize.cpp \/opt/EasyPR/src/train/ann_train.cpp \/opt/EasyPR/src/train/annCh_train.cpp \/opt/EasyPR/src/train/create_data.cpp \/opt/EasyPR/src/train/svm_train.cpp \/opt/EasyPR/src/train/train.cpp \/opt/EasyPR/src/util/kv.cpp \/opt/EasyPR/src/util/program_options.cpp \/opt/EasyPR/src/util/util.cpp \/opt/EasyPR/thirdparty/LBP/helper.cpp \/opt/EasyPR/thirdparty/LBP/lbp.cpp \/opt/EasyPR/thirdparty/mser/mser2.cpp \/opt/EasyPR/thirdparty/svm/corrected_svm.cpp \/opt/EasyPR/thirdparty/textDetect/erfilter.cpp \/opt/EasyPR/thirdparty/xmlParser/xmlParser.cpp/opt/EasyPR/include/easypr/core/character.hpp \/opt/EasyPR/include/easypr/core/chars_identify.h \/opt/EasyPR/include/easypr/core/chars_recognise.h \/opt/EasyPR/include/easypr/core/chars_segment.h \/opt/EasyPR/include/easypr/core/core_func.h \/opt/EasyPR/include/easypr/core/feature.h \/opt/EasyPR/include/easypr/core/params.h \/opt/EasyPR/include/easypr/core/plate.hpp \/opt/EasyPR/include/easypr/core/plate_detect.h \/opt/EasyPR/include/easypr/core/plate_judge.h \/opt/EasyPR/include/easypr/core/plate_locate.h \/opt/EasyPR/include/easypr/core/plate_recognize.h \/opt/EasyPR/include/easypr/train/ann_train.h \/opt/EasyPR/include/easypr/train/annCh_train.h \/opt/EasyPR/include/easypr/train/create_data.h \/opt/EasyPR/include/easypr/train/svm_train.h \/opt/EasyPR/include/easypr/train/train.h \/opt/EasyPR/include/easypr/util/kv.h \/opt/EasyPR/include/easypr/util/program_options.h \/opt/EasyPR/include/easypr/util/switch.hpp \/opt/EasyPR/include/easypr/util/util.h \/opt/EasyPR/include/easypr/api.hpp \/opt/EasyPR/include/easypr/config.h \/opt/EasyPR/include/easypr/version.h \/opt/EasyPR/include/easypr.h \/opt/EasyPR/test/accuracy.hpp \/opt/EasyPR/test/chars.hpp \/opt/EasyPR/test/config.hpp \/opt/EasyPR/test/plate.hpp \/opt/EasyPR/test/result.hpp \/opt/EasyPR/thirdparty/LBP/helper.hpp \/opt/EasyPR/thirdparty/LBP/lbp.hpp \/opt/EasyPR/thirdparty/mser/mser2.hpp \/opt/EasyPR/thirdparty/svm/precomp.hpp \/opt/EasyPR/thirdparty/textDetect/erfilter.hpp \/opt/EasyPR/thirdparty/xmlParser/xmlParser.hINCLUDEPATH +=/usr/local/include/
LIBS+=/usr/local/lib/libopencv_world.soINCLUDEPATH += /opt/EasyPR/include/DISTFILES += \model/ann_chinese.xml \model/ann.xml \model/annCh.xml \model/svm_hist.xml

此时点击生成，可能还会有报错，在thirdparty前加上 ../即可，一个一个慢慢加，大概有4处

运行一下工程，有窗口运行，就代表配置成功

当然，你看到了如下 /opt/EasyPR 和 Other files生成，也代表你配置成功了

二：车牌识别UI绘制

三：车牌识别代码实现

类PlayerVideoThread

#ifndef PLAYERVIDEOTHREAD_H
#define PLAYERVIDEOTHREAD_H
#include <QDebug>
#include <QThread>
#include <opencv2/opencv.hpp>using namespace cv;class PlayerVideoThread : public QThread
{Q_OBJECT
public:PlayerVideoThread(char *videopath);void run();
private:VideoCapture cap;Mat frame;
signals:void frameVideo(Mat frame);
};#endif // PLAYERVIDEOTHREAD_H

#include "playervideothread.h"PlayerVideoThread::PlayerVideoThread(char *videopath):QThread ()
{if(cap.open(videopath)){qDebug()<<"open video success";}}
void PlayerVideoThread::run()
{while(cap.read(frame)){emit frameVideo(frame);msleep(40);}}

类 widget

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QDebug>
#include <easypr.h>
#include <opencv2/opencv.hpp>
#include "playervideothread.h"using namespace easypr;
using namespace cv;namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = nullptr);~Widget();private slots:void on_pushButton_clicked();void on_pushButton_2_clicked();private:Ui::Widget *ui;CPlateRecognize pr;VideoCapture cap;vector<CPlate> plateVec;Mat frame;CPlate plate;Mat plateMat;PlayerVideoThread *playerVideoThread;
protected:void paintEvent(QPaintEvent *e);
public slots:void updateImage(Mat img);};#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget)
{ui->setupUi(this);pr.setDetectType(PR_DETECT_CMSER|PR_DETECT_COLOR);pr.setMaxPlates(4);pr.setResultShow(false);
}Widget::~Widget()
{delete ui;
}void Widget::on_pushButton_clicked()
{this->playerVideoThread = new PlayerVideoThread ("./video/car_input.mp4");connect(this->playerVideoThread,SIGNAL(frameVideo(Mat)),this,SLOT(updateImage(Mat)),Qt::BlockingQueuedConnection);this->playerVideoThread->start();
}void Widget::on_pushButton_2_clicked()
{Mat car_number;int result = pr.plateRecognize(this->frame,plateVec);qDebug()<<"result ="<<result;if(result == 0){plate = plateVec.at(0); //car infoplateMat = plate.getPlateMat(); //car number infocvtColor(plateMat,car_number,CV_BGR2RGB);cvtColor(car_number,car_number,CV_BGR2RGB);QImage q_image = QImage(car_number.data,car_number.cols,car_number.rows,QImage::Format_RGB888);ui->label_2->setPixmap(QPixmap::fromImage(q_image));ui->label_2->setScaledContents(true);string str_car_num = plateVec[0].getPlateStr();QString q_str = QString::fromLocal8Bit(str_car_num.c_str());ui->lineEdit->clear();ui->lineEdit->insert(q_str);}plateVec.clear();}void Widget::paintEvent(QPaintEvent *e)
{QImage q_image = QImage(frame.data,frame.cols,frame.rows,QImage::Format_RGB888);ui->label->setPixmap(QPixmap::fromImage(q_image));ui->label->setScaledContents(true);
}void Widget::updateImage(Mat img)
{this->frame = img.clone();cvtColor(frame,frame,CV_BGR2RGB);this->update();
}

主入口测试

#include "widget.h"
#include <QApplication>
#include <easypr.h>using namespace easypr;int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}

四：车牌识别成果展示

当车牌靠近缓冲带时候，点击carnum 即可车牌识别

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【OpenCV】车牌识别检测

一：EasyPR开源库 ubuntu下配置

二：车牌识别UI绘制

三：车牌识别代码实现

四：车牌识别成果展示

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【OpenCV】 车牌识别检测

一：EasyPR开源库 ubuntu下配置

二：车牌识别UI绘制

三：车牌识别代码实现

四：车牌识别成果展示

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