1、error: 'explict' does not name a type e
#ifndef CAMERA_H
#define CAMERA_H
#include <QImage>
#include <QDebug>
#include <QTimer>
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
class Camera :public QObject
{
public:
explict Camera{QObject *parent=0};//错误定位至此处，去除explict 括号写成了大括号
~Camera();
private:
VideoCapture *capture;
QTimer *timer;
QImage matToImage(const Mat&);
2、
E:\QTprogram\0215camere\camera.h:10: error: new types may not be defined in a return type
class Camera :public QObject
class Camera :public QObject //定位至此处 类Camera 末尾未加；
{
public:
Camera(QObject *parent=0);
~Camera();
private:
VideoCapture *capture;
QTimer *timer;
QImage matToImage(const Mat&);
signals:
void readyImage(const QImage&);
参照：现类的声明时没加“；”
class 类名
{
public:
protected:
private:
} ---------这里没有“；”
3、
E:\opencv3.4.0\OpenCV-MinGW-Build-OpenCV-3.4.5\include\opencv2\core\hal\interface.h:83: error: invalid use of member (did you forget the '&' ?)
#define CV_MAKETYPE(depth,cn) (CV_MAT_DEPTH(depth) + (((cn)-1) << CV_CN_SHIFT))
^
QImage Camera::matToImage(const Mat &img)
{
if(img.type==CV_8UC3) //img不是类， 是对象 后面调用类的成员函数 需要加（） img.type()
{
标签：问题,const,读取,img,QObject,shexiangtou,Camera,include,public
From： https://www.cnblogs.com/dq0618/p/17131615.html