OpenCV4入门系列教程测试6:绘图综合测试

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绘制图形

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//--------------------------------------【程序说明】-------------------------------------------
// 程序说明:《OpenCV3编程入门》OpenCV3版书本配套示例程序20
// 程序描述:使用OpenCV进行基本的绘图操作
// 2014年11月 Created by @浅墨_毛星云
// 2014年12月 Revised by @浅墨_毛星云
//------------------------------------------------------------------------------------------------

//---------------------------------【头文件、命名空间包含部分】----------------------------
// 描述:包含程序所使用的头文件和命名空间
//------------------------------------------------------------------------------------------------
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
using namespace cv;

//此程序对于OpenCV3版需要额外包含头文件:
#include <opencv2/imgproc/imgproc.hpp>

//-----------------------------------【宏定义部分】--------------------------------------------
// 描述:定义一些辅助宏
//------------------------------------------------------------------------------------------------
#define WINDOW_NAME1 "Drawing1" //为窗口标题定义的宏
#define WINDOW_NAME2 "Drawing2" //为窗口标题定义的宏
#define WINDOW_WIDTH 600 //定义窗口大小的宏

//--------------------------------【全局函数声明部分】-------------------------------------
// 描述:全局函数声明
//-----------------------------------------------------------------------------------------------
void DrawEllipse(Mat img, double angle); //绘制椭圆
void DrawFilledCircle(Mat img, Point center); //绘制圆
void DrawPolygon(Mat img); //绘制多边形
void DrawLine(Mat img, Point start, Point end); //绘制线段

//---------------------------------------【main( )函数】--------------------------------------
// 描述:控制台应用程序的入口函数,我们的程序从这里开始执行
//-----------------------------------------------------------------------------------------------
int main(void) {

// 创建空白的Mat图像
Mat atomImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);
Mat rookImage = Mat::zeros(WINDOW_WIDTH, WINDOW_WIDTH, CV_8UC3);

// ---------------------<1>绘制化学中的原子示例图------------------------

//【1.1】先绘制出椭圆
DrawEllipse(atomImage, 90);
DrawEllipse(atomImage, 0);
DrawEllipse(atomImage, 45);
DrawEllipse(atomImage, -45);

//【1.2】再绘制圆心
DrawFilledCircle(atomImage, Point(WINDOW_WIDTH / 2, WINDOW_WIDTH / 2));

// ----------------------------<2>绘制组合图-----------------------------
//【2.1】先绘制出椭圆
DrawPolygon(rookImage);

// 【2.2】绘制矩形
rectangle(rookImage, Point(0, 7 * WINDOW_WIDTH / 8), Point(WINDOW_WIDTH, WINDOW_WIDTH),
Scalar(0, 255, 255), -1, 8);

// 【2.3】绘制一些线段
DrawLine(rookImage, Point(0, 15 * WINDOW_WIDTH / 16),
Point(WINDOW_WIDTH, 15 * WINDOW_WIDTH / 16));
DrawLine(rookImage, Point(WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8),
Point(WINDOW_WIDTH / 4, WINDOW_WIDTH));
DrawLine(rookImage, Point(WINDOW_WIDTH / 2, 7 * WINDOW_WIDTH / 8),
Point(WINDOW_WIDTH / 2, WINDOW_WIDTH));
DrawLine(rookImage, Point(3 * WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8),
Point(3 * WINDOW_WIDTH / 4, WINDOW_WIDTH));

// ---------------------------<3>显示绘制出的图像------------------------
imshow(WINDOW_NAME1, atomImage);
moveWindow(WINDOW_NAME1, 0, 200);
imshow(WINDOW_NAME2, rookImage);
moveWindow(WINDOW_NAME2, WINDOW_WIDTH, 200);

waitKey(0);
return (0);
}

//-------------------------------【DrawEllipse( )函数】--------------------------------
// 描述:自定义的绘制函数,实现了绘制不同角度、相同尺寸的椭圆
//-----------------------------------------------------------------------------------------
void DrawEllipse(Mat img, double angle) {
int thickness = 2;
int lineType = 8;

ellipse(img, Point(WINDOW_WIDTH / 2, WINDOW_WIDTH / 2),
Size(WINDOW_WIDTH / 4, WINDOW_WIDTH / 16), angle, 0, 360, Scalar(255, 129, 0),
thickness, lineType);
}

//-----------------------------------【DrawFilledCircle( )函数】---------------------------
// 描述:自定义的绘制函数,实现了实心圆的绘制
//-----------------------------------------------------------------------------------------
void DrawFilledCircle(Mat img, Point center) {
int thickness = -1;
int lineType = 8;

circle(img, center, WINDOW_WIDTH / 32, Scalar(0, 0, 255), thickness, lineType);
}

//-----------------------------------【DrawPolygon( )函数】--------------------------
// 描述:自定义的绘制函数,实现了凹多边形的绘制
//--------------------------------------------------------------------------------------
void DrawPolygon(Mat img) {
int lineType = 8;

//创建一些点
Point rookPoints[ 1 ][ 20 ];
rookPoints[ 0 ][ 0 ] = Point(WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 1 ] = Point(3 * WINDOW_WIDTH / 4, 7 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 2 ] = Point(3 * WINDOW_WIDTH / 4, 13 * WINDOW_WIDTH / 16);
rookPoints[ 0 ][ 3 ] = Point(11 * WINDOW_WIDTH / 16, 13 * WINDOW_WIDTH / 16);
rookPoints[ 0 ][ 4 ] = Point(19 * WINDOW_WIDTH / 32, 3 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 5 ] = Point(3 * WINDOW_WIDTH / 4, 3 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 6 ] = Point(3 * WINDOW_WIDTH / 4, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 7 ] = Point(26 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 8 ] = Point(26 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
rookPoints[ 0 ][ 9 ] = Point(22 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
rookPoints[ 0 ][ 10 ] = Point(22 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 11 ] = Point(18 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 12 ] = Point(18 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
rookPoints[ 0 ][ 13 ] = Point(14 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 4);
rookPoints[ 0 ][ 14 ] = Point(14 * WINDOW_WIDTH / 40, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 15 ] = Point(WINDOW_WIDTH / 4, WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 16 ] = Point(WINDOW_WIDTH / 4, 3 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 17 ] = Point(13 * WINDOW_WIDTH / 32, 3 * WINDOW_WIDTH / 8);
rookPoints[ 0 ][ 18 ] = Point(5 * WINDOW_WIDTH / 16, 13 * WINDOW_WIDTH / 16);
rookPoints[ 0 ][ 19 ] = Point(WINDOW_WIDTH / 4, 13 * WINDOW_WIDTH / 16);

const Point *ppt[ 1 ] = {rookPoints[ 0 ]};
int npt[] = {20};

fillPoly(img, ppt, npt, 1, Scalar(255, 255, 255), lineType);
}

//-----------------------------------【DrawLine( )函数】--------------------------
// 描述:自定义的绘制函数,实现了线的绘制
//---------------------------------------------------------------------------------
void DrawLine(Mat img, Point start, Point end) {
int thickness = 2;
int lineType = 8;
line(img, start, end, Scalar(0, 0, 0), thickness, lineType);
}

测试结果:

testing6

动态绘制图形

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//--------------------------------------【程序说明】-------------------------------------------
// 程序说明:《OpenCV3编程入门》OpenCV2版书本附赠示例程序01
// 程序描述:随机图形和文字生成示例
// 2014年11月 Revised by @浅墨_毛星云
//------------------------------------------------------------------------------------------------

//---------------------------------【头文件、命名空间包含部分】----------------------------
// 描述:包含程序所使用的头文件和命名空间
//------------------------------------------------------------------------------------------------
#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <stdio.h>
using namespace cv;

//-----------------------------------【全局变量声明部分】---------------------------------------
// 描述:声明全局变量
//---------------------------------------------------------------------------------------------------
const int NUMBER = 100;
const int DELAY = 5;

const int window_width = 900;
const int window_height = 600;
int x_1 = -window_width / 2;
int x_2 = window_width * 3 / 2;
int y_1 = -window_width / 2;
int y_2 = window_width * 3 / 2;

//-----------------------------------【函数声明部分】-------------------------------------------
// 描述:函数原型声明
//---------------------------------------------------------------------------------------------------
static Scalar randomColor(RNG &rng);
int Drawing_Random_Lines(Mat image, char *window_name, RNG rng);
int Drawing_Random_Rectangles(Mat image, char *window_name, RNG rng);
int Drawing_Random_Ellipses(Mat image, char *window_name, RNG rng);
int Drawing_Random_Polylines(Mat image, char *window_name, RNG rng);
int Drawing_Random_Filled_Polygons(Mat image, char *window_name, RNG rng);
int Drawing_Random_Circles(Mat image, char *window_name, RNG rng);
int Displaying_Random_Text(Mat image, char *window_name, RNG rng);
int Displaying_Big_End(Mat image, char *window_name, RNG rng);

//-----------------------------------【main( )函数】-------------------------------------------
// 描述:控制台应用程序的入口函数,我们的程序从这里开始
//-----------------------------------------------------------------------------------------------
int main(void) {
int c;

//创建窗口
char window_name[] = "Drawing2";

// 创建随机的RNG
RNG rng(0xFFFFFFFF);

//初始化矩阵
Mat image = Mat::zeros(window_height, window_width, CV_8UC3);

// 在 DELAY ms内显示窗口
imshow(window_name, image);
waitKey(DELAY);

//线条的绘制
c = Drawing_Random_Lines(image, window_name, rng);
if (c != 0)
return 0;

// 矩形的绘制
c = Drawing_Random_Rectangles(image, window_name, rng);
if (c != 0)
return 0;

// 椭圆的绘制
c = Drawing_Random_Ellipses(image, window_name, rng);
if (c != 0)
return 0;

// 折线的绘制
c = Drawing_Random_Polylines(image, window_name, rng);
if (c != 0)
return 0;

// 多边形的绘制
c = Drawing_Random_Filled_Polygons(image, window_name, rng);
if (c != 0)
return 0;

// 绘制圆形
c = Drawing_Random_Circles(image, window_name, rng);
if (c != 0)
return 0;

// 随机绘制文字
c = Displaying_Random_Text(image, window_name, rng);
if (c != 0)
return 0;

//绘制最终的谢幕
c = Displaying_Big_End(image, window_name, rng);
if (c != 0)
return 0;

waitKey(0);
return 0;
}

//-----------------------------------【randomColor( )函数】-----------------------------------
// 描述:生成随机颜色
//---------------------------------------------------------------------------------------------------
static Scalar randomColor(RNG &rng) {
int icolor = (unsigned)rng;
return Scalar(icolor & 255, (icolor >> 8) & 255, (icolor >> 16) & 255);
}

//---------------------------【Drawing_Random_Lines( )函数】-------------------------------
// 描述:绘制随机的线条
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Lines(Mat image, char *window_name, RNG rng) {
Point pt1, pt2;

for (int i = 0; i < NUMBER; i++) {
pt1.x = rng.uniform(x_1, x_2);
pt1.y = rng.uniform(y_1, y_2);
pt2.x = rng.uniform(x_1, x_2);
pt2.y = rng.uniform(y_1, y_2);

line(image, pt1, pt2, randomColor(rng), rng.uniform(1, 10), 8);
imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

//---------------------------【Drawing_Random_Ellipses( )函数】----------------------------
// 描述:绘制随机的矩形
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Rectangles(Mat image, char *window_name, RNG rng) {
Point pt1, pt2;
int lineType = 8;
int thickness = rng.uniform(-3, 10);

for (int i = 0; i < NUMBER; i++) {
pt1.x = rng.uniform(x_1, x_2);
pt1.y = rng.uniform(y_1, y_2);
pt2.x = rng.uniform(x_1, x_2);
pt2.y = rng.uniform(y_1, y_2);

rectangle(image, pt1, pt2, randomColor(rng), MAX(thickness, -1), lineType);

imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

//---------------------------【Drawing_Random_Ellipses( )函数】----------------------------
// 描述:绘制随机的椭圆
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Ellipses(Mat image, char *window_name, RNG rng) {
int lineType = 8;

for (int i = 0; i < NUMBER; i++) {
Point center;
center.x = rng.uniform(x_1, x_2);
center.y = rng.uniform(y_1, y_2);

Size axes;
axes.width = rng.uniform(0, 200);
axes.height = rng.uniform(0, 200);

double angle = rng.uniform(0, 180);

ellipse(image, center, axes, angle, angle - 100, angle + 200, randomColor(rng),
rng.uniform(-1, 9), lineType);

imshow(window_name, image);

if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

//---------------------------【Drawing_Random_Polylines( )函数】--------------------------
// 描述:绘制随机的折线
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Polylines(Mat image, char *window_name, RNG rng) {
int lineType = 8;

for (int i = 0; i < NUMBER; i++) {
Point pt[ 2 ][ 3 ];
pt[ 0 ][ 0 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 0 ].y = rng.uniform(y_1, y_2);
pt[ 0 ][ 1 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 1 ].y = rng.uniform(y_1, y_2);
pt[ 0 ][ 2 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 2 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 0 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 0 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 1 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 1 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 2 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 2 ].y = rng.uniform(y_1, y_2);

const Point *ppt[ 2 ] = {pt[ 0 ], pt[ 1 ]};
int npt[] = {3, 3};

polylines(image, ppt, npt, 2, true, randomColor(rng), rng.uniform(1, 10), lineType);

imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}
return 0;
}

//---------------------------【Drawing_Random_Filled_Polygons( )函数】------------------
// 描述:绘制随机的多边形
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Filled_Polygons(Mat image, char *window_name, RNG rng) {
int lineType = 8;

for (int i = 0; i < NUMBER; i++) {
Point pt[ 2 ][ 3 ];
pt[ 0 ][ 0 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 0 ].y = rng.uniform(y_1, y_2);
pt[ 0 ][ 1 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 1 ].y = rng.uniform(y_1, y_2);
pt[ 0 ][ 2 ].x = rng.uniform(x_1, x_2);
pt[ 0 ][ 2 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 0 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 0 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 1 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 1 ].y = rng.uniform(y_1, y_2);
pt[ 1 ][ 2 ].x = rng.uniform(x_1, x_2);
pt[ 1 ][ 2 ].y = rng.uniform(y_1, y_2);

const Point *ppt[ 2 ] = {pt[ 0 ], pt[ 1 ]};
int npt[] = {3, 3};

fillPoly(image, ppt, npt, 2, randomColor(rng), lineType);

imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}
return 0;
}

//---------------------------【Drawing_Random_Circles( )函数】-----------------------------
// 描述:绘制随机的圆
//---------------------------------------------------------------------------------------------------
int Drawing_Random_Circles(Mat image, char *window_name, RNG rng) {
int lineType = 8;

for (int i = 0; i < NUMBER; i++) {
Point center;
center.x = rng.uniform(x_1, x_2);
center.y = rng.uniform(y_1, y_2);

circle(image, center, rng.uniform(0, 300), randomColor(rng), rng.uniform(-1, 9), lineType);

imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

//---------------------------【Displaying_Random_Text( )函数】-----------------------------
// 描述:绘制随机的文字
//---------------------------------------------------------------------------------------------------
int Displaying_Random_Text(Mat image, char *window_name, RNG rng) {
int lineType = 8;

for (int i = 1; i < NUMBER; i++) {
Point org;
org.x = rng.uniform(x_1, x_2);
org.y = rng.uniform(y_1, y_2);

putText(image, "Testing text rendering", org, rng.uniform(0, 8),
rng.uniform(0, 100) * 0.05 + 0.1, randomColor(rng), rng.uniform(1, 10), lineType);

imshow(window_name, image);
if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

//---------------------------【Displaying_Big_End( )函数】------------------------------------
// 描述:绘制最终的结束效果
//---------------------------------------------------------------------------------------------------
int Displaying_Big_End(Mat image, char *window_name, RNG) {
Size textsize = getTextSize("OpenCV forever!", FONT_HERSHEY_COMPLEX, 3, 5, 0);
Point org((window_width - textsize.width) / 2, (window_height - textsize.height) / 2);
int lineType = 8;

Mat image2;

for (int i = 0; i < 255; i += 2) {
image2 = image - Scalar::all(i);
putText(image2, "OpenCV forever!", org, FONT_HERSHEY_PLAIN, 3, Scalar(50, i, i), 5,
lineType);

imshow(window_name, image2);
if (waitKey(DELAY) >= 0) {
return -1;
}
}

return 0;
}

测试效果如图:

dyna

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