Opencv_08_Point&&Scalar&circle&rectangle&ellipse&line

#include
#include
#include

using namespace std;
using namespace cv;

/*
cv::Point与cv::Scalar
1)Point表示2D平面上的一个点x,y
Point p;
p.x=10;
p.y=8;
or
p=Point(10,8);
2)Scalar表示四个元素的向量
Scalar(a,b,c);    a=blue,b=green,c=red表示RGB三个通道
*/

 

void My_Line();
void My_Rectangle();
void My_Ellipse();
void My_Circle();
void My_Ploygon();
void RandomLinedemo();
const char* drawdemo_win = "draw shapes and test demo";
Mat bgImage;

int main(int argc, char** argv)
{
    string filepath1 = "D:/Learning/Opecv/1.jpg";
    //string filepath2 = "D:/Learning/Opecv/2.jpg";
    //Mat src1, src2, dst;
    bgImage = imread(filepath1);
    //src2 = imread(filepath2);

    if (!bgImage.data)
    {
        cout << "could not load image!!!" << endl;
        return -1;
    }

    //My_Line();
    //My_Rectangle();
    //My_Ellipse();
    //My_Circle();
    //My_Ploygon();

    //putText(bgImage, "Hello OpenCV", Point(300, 300), CV_FONT_BLACK, 1.0, Scalar(12, 255, 200), 1, 8);

    char input_image[] = "input_image";
    namedWindow(input_image, CV_WINDOW_AUTOSIZE);
    imshow(input_image, bgImage);

 

    RandomLinedemo();
    waitKey(0);

 

    return 0;
}

void My_Line()
{
    Point p1 = Point(20, 30);
    Point p2;
    p2.x = 300;
    p2.y = 300;

    Scalar color = Scalar(0, 0, 255);
    line(bgImage, p1, p2, color, 1, LINE_AA);    //LINE_AA->反锯齿

}

void My_Rectangle()
{
    Rect rect = Rect(200, 100, 300, 300);
    Scalar color = Scalar(255, 0, 0);
    rectangle(bgImage, rect, color, 2, LINE_8);
}

void My_Ellipse()
{
    Scalar color = Scalar(0, 255, 0);
    ellipse(bgImage, Point(bgImage.cols / 2, bgImage.rows / 2), Size(bgImage.cols / 4, bgImage.rows / 8), 90, 0, 630, color, 2, LINE_4);

}

void My_Circle()
{
    Scalar color = Scalar(0, 255, 255);
    Point center = Point(bgImage.cols / 2, bgImage.rows / 2);
    circle(bgImage, center, 50, color, 1, LINE_4);
}

void My_Ploygon()
{
    Point pts[1][5];
    pts[0][0] = Point(100, 100);
    pts[0][1] = Point(100, 200);
    pts[0][2] = Point(200, 200);
    pts[0][3] = Point(200, 100);
    pts[0][4] = Point(100, 100);

    const Point* ppts[] = { pts[0] };
    int npt[] = { 5 };
    Scalar color = Scalar(255, 12, 255);
    fillPoly(bgImage, ppts, npt, 1, color, 8);
}

void RandomLinedemo()
{
    RNG rng(12345);
    Point pt1;
    Point pt2;
    Mat bg = Mat::zeros(bgImage.size(), bgImage.type());
    namedWindow("random line demo", CV_WINDOW_AUTOSIZE);
    for (int i = 0; i < 10000; i++)
    {
        pt1.x = rng.uniform(0, bgImage.cols);
        pt2.x = rng.uniform(0, bgImage.cols);
        pt1.y = rng.uniform(0, bgImage.rows);
        pt2.y = rng.uniform(0, bgImage.rows);

        Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));

        if (waitKey(50) > 0)
            break;
        line(bg, pt1, pt2, color, 1, 8);
        imshow("random line demo", bg);
    }
}