[人工智能]opencv_C++学习（3）

1.绘制形状和文字

代码演示：

#include<opencv2/opencv.hpp>
#include<iostream>

using namespace cv;
Mat bgImage;
const char* dravdemo_vin = "draw shapes and text demo";
void MyLines();
void MyRectangle();
void MyEllipse();
void MyCircle();
void MyPolygon();
int main(int argc, char** argv)
{
	bgImage = imread("C:/ERRT/c16d7c94363dc0f6e95e46187605e803.jpg");
	if (!bgImage.data)
	{
		printf("could not load image...\n");
		return -1;
	}
	MyLines();
	MyRectangle();
	MyEllipse();
	MyCircle();
	MyPolygon();

	putText(bgImage, "Hello CAT", Point(bgImage.cols / 2, bgImage.rows / 2), FONT_HERSHEY_COMPLEX, 2.0, Scalar(177, 178, 23), 3, LINE_AA);
	namedWindow(dravdemo_vin, WINDOW_FREERATIO);
	imshow(dravdemo_vin, bgImage);

	

	waitKey(0);
	return 0;
}

void MyLines()
{
	Point p1 = Point(20,30);
	Point p2;
	p2.x = 700;
	p2.y = 700;
	Scalar color = Scalar(0, 0, 255);
	line(bgImage, p1, p2, color, 1, LINE_AA);
}

void MyRectangle()
{
	Rect rect = Rect(700, 100, 700, 700);
	Scalar color = Scalar(255, 0, 0);
	rectangle(bgImage, rect, color, 2, LINE_8);
}

void MyEllipse()
{
	Scalar color = Scalar(0, 255, 0);
	ellipse(bgImage, Point(bgImage.cols / 2, bgImage.rows / 2), Size(bgImage.cols / 4, bgImage.rows / 8), 45, 0, 360, color, 2, LINE_8);
}

void MyCircle()
{
	Scalar color = Scalar(0, 255, 255);
	Point center = Point(bgImage.cols / 2, bgImage.rows / 2);
	circle(bgImage, center, 500, color, 2, 8);
}

void MyPolygon()
{
	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);
}

效果图：

2.模糊图像1

代码演示：

#include<opencv2/opencv.hpp>
#include<iostream>

using namespace cv;

int main(int argc, char** argv)
{
	Mat src, dst;
	src = imread("C:/ERRT/c16d7c94363dc0f6e95e46187605e803.jpg");
	if (!src.data)
	{
		printf("could not load image...\n");
		return -1;
	}
	char input_title[] = "input image";
	char output_title[] = "blur image";
	namedWindow(input_title, WINDOW_FREERATIO);
	namedWindow(output_title, WINDOW_FREERATIO);
	imshow(input_title, src);

	blur(src, dst, Size(25, 25), Point(-1, -1));
	imshow(output_title, dst);

	Mat gblur;
	GaussianBlur(src, gblur, Size(25, 25), 11, 11);
	namedWindow("gaussianblur", WINDOW_FREERATIO);
	imshow("gaussianblur", gblur);

	waitKey(0);
	return 0;
}

?效果图：

3.模糊图像2

代码演示：

#include<opencv2/opencv.hpp>
#include<iostream>

using namespace cv;

int main(int argc, char** argv)
{
	Mat src, dst;
	src = imread("C:/ERRT/c16d7c94363dc0f6e95e46187605e803.jpg");
	if (!src.data)
	{
		printf("could not load image...\n");
		return -1;
	}
	namedWindow("input image", WINDOW_FREERATIO);
	imshow("input image", src);

	//medianBlur(src, dst, 3);
	bilateralFilter(src, dst, 15, 150, 3);
	namedWindow("median Filter Result", WINDOW_FREERATIO);
	imshow("median Filter Result", dst);

	

	waitKey(0);
	return 0;
}

效果图：

?

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