opencv-Mat

Mat應用：

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <cv.h>
#include <iostream>

using namespace std;
using namespace cv;

int main()
{
  
    //Mat() Constructor
    Mat M(2,2,CV_8UC3,Scalar(0,0,255));
    cout<<"M = "<<endl<<" "<<M<<endl<<endl;
  
    //C/C++ arrays and initialize via constructor
    int sz[3]={2,2,2};//建立一個三維矩陣
    Mat L(3,sz,CV_8UC1,Scalar::all(0));
    //cout<<"L = "<<endl<<" "<<L<<endl<<endl;


    //create a header for an already existing IplImage pointer
    IplImage* img = cvLoadImage("D:\\lena.bmp",1);
    Mat mtx(img);//把IplImage*轉換為Mat
  
    //create()函數
    M.create(4,4,CV_8UC(2));
    cout<<"M = "<<endl<<" "<<M<<endl<<endl;
  
    //MATLAB風格初始化:zero(),ones(),:eyes().
    Mat E = Mat::eye(4,4,CV_64F);
    cout<<"E = "<<endl<<" "<<E<<endl<<endl;
    Mat O = Mat::ones(2,2,CV_32F);
    cout<<"O = "<<endl<<" "<<O<<endl<<endl;
    Mat Z = Mat::zeros(3,3,CV_8UC1);
    cout<<"Z = "<<endl<<" "<<Z<<endl<<endl;
  
    //小矩陣用逗号初始化
    Mat C = ( Mat_<double>(3,3)<< 0,-1,0,-1,5,-1,0,-1,0);
    cout<<"C = "<<endl<<" "<<C<<endl<<endl;


    //對已經存在的Mat對象建立新的頭，并克隆或複制
    Mat RowClone = C.row(1).clone();
    cout<<"RowClone = "<<endl<<" "<<RowClone<<endl<<endl;
  
    //利用随機函數建立Mat矩陣
    Mat R = Mat(3,2,CV_8UC3);
    randu(R,Scalar::all(0),Scalar::all(255));
    cout<<"R = "<<endl<<" "<<R<<endl<<endl;
  
    //列印輸出格式化
    //default格式
    cout<<"R(default) = "<<endl<<R<<endl<<endl;
    //Python格式
    cout<<"R(Python) = "<<endl<<format(R,"python")<<endl<<endl;
    //comma separated values(CSV)
    cout<<"R(csv) = "<<endl<<format(R,"csv")<<endl<<endl;
    //numpy
    cout<<"R(numpy) = "<<endl<<format(R,"numpy")<<endl<<endl;
    //C
    cout<<"R(c) = "<<endl<<format(R,"C")<<endl<<endl;

    //2D Point
    Point2f p(5,1);
    cout<<"Point(2D) = "<<p<<endl<<endl;
    //3D Point
    Point3f P3f(2,6,7);
    cout<<"Point (3D) = "<<P3f<<endl<<endl;
    //std::vector via cv::Mat
    vector<float> v;
    v.push_back((float)CV_PI);
    v.push_back(2);
    v.push_back(3.01f);
    cout<<"Vector of floats via Mat = "<<Mat(v)<<endl<<endl;
    //std::vector of points
    vector<Point2f> vPoints(20);
    for(size_t E=0;E<vPoints.size();++E)
    vPoints[E] = Point2f((float)(E*5),(float)(E%7));
    cout<<"A Vector of 2D POINTS = "<<vPoints<<endl<<endl;
    return 0;
}