MVRT Vision Trainings

MVRT Vision Trainings Examples Week 6

add.cpp

int add(int x, int y)
{
    return x + y;
}

add.hpp

// This is start of the header guard
// ADD_HPP can be any unique name
// By convention, we use the name of the header file
#ifndef ADD_HPP
#define ADD_HPP
 
// This is the content of the .hpp file, which is where the declarations go
int add(int x, int y); // function prototype for add.hpp -- don't forget the semicolon!
 
// This is the end of the header guard
// Recall, expressions beginning with the "#" sign are preprocessors
#endif

cameraFeed.cpp

#include "opencv2/opencv.hpp"
using namespace cv;
int main(int, char**)
{
   VideoCapture cap(0); // open the default camera
   if(!cap.isOpened())  // check if we succeeded
       return -1;
   Mat edges;
   namedWindow("edges",1);
   for(;;)
   {
       Mat frame;
       cap >> frame; // get a new frame from camera
       cvtColor(frame, edges, COLOR_BGR2GRAY);
       GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
       Canny(edges, edges, 0, 30, 3);
       imshow("edges", edges);
       if(waitKey(30) >= 0) break;
   }
   // the camera will be deinitialized automatically in VideoCapture destructor
   return 0;
}

headerFiles.cpp

#include <iostream>

// Note that custom header files are in quotation marks by convention,
// but standard libraries such as iostream are in side angled brackets
#include "add.hpp"
 
int main()
{
    using namespace std;
    cout << "The sum of 3 and 4 is " << add(3, 4) << endl;
    return 0;
}

matrixMethod.cpp

#include "opencv2/opencv.hpp"
using namespace cv;

void exampleMethod (cv::Mat& frame);

int main(int, char**)
{
   VideoCapture cap(0); // open the default camera
   if(!cap.isOpened())  // check if we succeeded
       return -1;
   Mat edges;
   namedWindow("edges",1);
   for(;;)
   {
       Mat frame;
       cap >> frame; // get a new frame from camera
       cvtColor(frame, edges, COLOR_BGR2GRAY);
       GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
       Canny(edges, edges, 0, 30, 3);
       imshow("edges", edges);
       if(waitKey(30) >= 0) break;
   }
   // the camera will be deinitialized automatically in VideoCapture destructor
   return 0;
}

// Pass frame as alias instead of by instance to save memory
void exampleMethod (cv::Mat& frame)
{
	// Do stuff with frame now
}