01.15

#include "widget.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    VideoCapture mv;
   mv.open("D:\\opencv\\heads\\01.mp4");

   //定义一个存放视频里读取到的一帧图像
   Mat src;
   //定义一个存放灰度视频的
   Mat gray;
   //定义一个存放均衡化的容器
    Mat dst;
   while(mv.read(src)){
        //显示图像

       imshow("test1",src);

       //灰度处理
        cvtColor(src,gray,CV_BGR2GRAY);
        namedWindow("test2");
        imshow("test2",gray);

       equalizeHist(gray,dst);
       namedWindow("test3");

       imshow("test3",dst);

       if(waitKey(40)==27){
            break;

       }
   }

void Widget::on_deleteBtn_clicked()
{
    QSqlQuery query;
    int numb=ui->numberEdit->text().toUInt();
     QString name=ui->nameEdit->text();
     if(numb==0&&name.isEmpty()){
         QMessageBox::information(this,"提示","请填写完整信息");
     return;
     }else if(numb!=0){
    QString sql=QString("delete from stu_info_table where numb=%1 ").arg(numb);
    if(query.exec(sql)){
        QMessageBox::information(this,"提示","删除成功!");

    }else{
           QMessageBox::information(this,"错误","删除失败!");

    }
     }else if(!name.isEmpty()){
         QString sql=QString("delete from stu_info_table where name='%1' ").arg(name);

    if(query.exec(sql)){
        QMessageBox::information(this,"提示","删除成功!");

    }else{
           QMessageBox::information(this,"错误","删除失败!");

    }
     }
}