# 38) [OPENCV] 1.기본다지기

[Point_클래스: Point(x,y)]

가로와 세로 위치를 2차원 좌표로 나타내기 위한 템플릿 클래스

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {
	Point_<int> pt1(100, 200);
	printf("%d %d\n", pt1.x, pt1.y);

	Point_<float> pt2(10.0f, 20.0f);
	printf("%.02f %.02f\n", pt2.x, pt2.y);

	Point_<double> pt3(10.0, 20.0);
	printf("%.02lf %.02lf\n", pt3.x, pt3.y);

	Point2i pt4(100, 200);
	Point2f pt5(100.0f, 200.0f);
	Point2d pt6(100.0, 200.0);
	printf("%d %d\n", pt4.x, pt4.y);

	Point pt7 = pt1 + pt4;
	printf("%d %d\n", pt7.x, pt7.y);

	// 스케일한다
	Point2f pt8 = pt2 * 3.0f;
	printf("%0.2f %0.2f\n", pt8.x, pt8.y);

	// 캐스팅
	Point2i pt9 = pt1 + (Point2i)pt2;

	Point2f pt10(10.0f, 20.0f);
	// dot : 내적(각 성분끼리의 곱에 합)
	float result = pt5.dot(pt10);
	printf("%.02f %.02f\n", result, pt5.dot(pt10));
    
}

[2]

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {

	Point3_<int> pt1(100, 200, 300);
	Point3_<float> pt2(92.3f, 125.23f, 250.f);
	Point3f pt3(0.3f, 0.f, 15.7f);
	Point3d pt4(0.25, 0.6, 33.3);

	Point3i pt5 = pt1 + (Point3i)pt2;
	printf("%.02f %.02f %.02f\n", pt2.x, pt2.y, pt2.z);

	Point3f pt6 = pt2 * 3.14f;
	Point3d pt7 = ((Point3d)pt3 + pt4) * 10.f;

	float result = pt4.dot(pt7);

}

---

[Size_ 클래스 : Size(x,y)]

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {

	Size_<int> sz1(100, 200);
	Size_<float> sz2(192.3f, 25.3f);
	Size_<double> sz3(100.2, 30.9);

	Size sz4(120, 69);
	Size2f sz5(0.3f, 0.f);
	Size2d sz6(0.25, 0.6);

	printf("%d %d\n", sz1.width, sz1.height);//100 200
	printf("%d\n", sz1.area());		//20000

	Point2d pt1(0.25, 0.6);
	Size2i sz7 = sz1 + (Size2i)sz2;
	Size2d sz8 = sz3 + (Size2d)sz4;
}

---

[Rect_클래스]

2차원의 사각형 정보를 나타내기 위한 템플릿 클래스

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {

	Size2d sz(100.5, 60.6);
	Point2f pt1(20.f, 30.f), pt2(100.f, 200.f);

	Rect_<int> rect1(10, 10, 30, 50);
	Rect_<float> rect2(pt1, pt2);
	Rect_<double> rect3(Point2d(20.5, 10), sz);


	printf("%d %d\n", rect1.tl().x, rect1.tl().y);					//tl(): 사각형의 오른쪽위 Point반환
	printf("%d %d\n", rect1.br().x, rect1.br().y);					//br(): 사각형의 왼쪽아래 Point반환
	printf("%d %d\n", rect1.width, rect1.height);
	printf("%d %d\n", rect1.size().width, rect1.size().height);		//size(): Size(width,height)반환
	
	Size2i result = rect1.size();
	printf("%d %d\n", result.width, result.height);

}

---

[Vec 클래스]

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {

	Vec<int, 2> v1(5, 12); // 위치값이 2개, 값은 int
	Vec<double, 3> v2(40, 130.7, 125.6);

	Vec2b v3(10, 10);
	Vec6f v4(40.f, 230.25f, 525.6f);
	Vec3i v5(200, 230, 250);
	Vec3d v6 = v2 + (Vec3d)v5;
	Vec2b v7 = (Vec2b)v1 + v3;
	Vec6f v8 = v4 * 20.0f;

	Point pt1 = v1 + (Vec2i)v7;
	Point3_ <int> pt2 = (Vec3i)v2;

	cout << "[v3] = " << v3 << endl;
	cout << "[v7] = " << v7 << endl;

	cout << "[v3 * v7] = " << v3.mul(v7) << endl;
	cout << "v8[0] = " << v8[0] << endl;
	cout << "v8[1] = " << v8[1] << endl;
	cout << "v8[2] = " << v8[2] << endl;
	cout << "v8[3] = " << v8[3] << endl;
	cout << "[v2] = " << v2 << endl;

	cout << "[pt1] = " << pt1 << endl;
	cout << "[pt2] = " << pt2 << endl;
}

---

[Scalar_ 클래스]

화소의 값을 지정하기 위한 자료형으로 정의B(파랑), G(초록), R(빨강), 투명도의 4개 값 저장

#include <opencv2/opencv.hpp>


using namespace cv;
using namespace std;

int main(void) {

	Scalar_<uchar> red(0, 0, 255);
	Scalar_<int> blue(255, 0, 0);
	Scalar_<double> color1(500);
	Scalar_<float> color2(100.f, 200.f, 125.9f);

	Vec3d green(0, 0, 300.5);
	Scalar green1 = color1 + (Scalar)green;
	Scalar green2 = color2 + (Scalar_<float>)green;

	cout << "blue = " << blue[0] << ", " << blue[1];
	cout << ", " << blue[2] << endl;
	cout << "red = " << red << endl;
	cout << "green = " << green << endl; // green = [0, 0, 300.5]
	cout << "(Scalar)green = " << (Scalar)green << endl; // (Scalar)green = [0, 0, 300.5, 0]
	cout << "green1 = " << green1 << endl; // green1 = [500, 0, 300.5, 0]
	cout << "green2 = " << green2 << endl; // green2 = [100, 200, 426.4, 0]

}