1.目的 （1）使用随机数发生器（RNG）获得均匀分布的随机数 （2）使用putText函数显示文字
2.部分代码实现 （1）实例化一个随机数发生器
//使用0xffffffff初始化随机数生成器 RNG rng(0xffffffff)（2）使用随机数发生器产生均匀分布
//产生0-100的随机整数 //uniform:均匀分布 int min = 0; int max = 100; rng.uniform(min, max);（3）使用随机数发生器随机产生Scalar
static Scalar RandomColor(RNG rng){ return(Scalar(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255))); }（4）使用随机数发生器绘制随机线条
int DrawingRandomLine(Mat& image, char windowName[], RNG rng){ if(!image.data){ cout << "more parameters are required!!!" << endl; return(-1); } int lineType = 8; Point X,Y; for(int i=0; i<100; i++){ //使用rng.uniform获取1-500的随机整数 X.x = rng.uniform(1,500); X.y = rng.uniform(1,500); Y.x = rng.uniform(1,500); Y.y = rng.uniform(1,500); //RandomColor(rng)：随机产生颜色 line(image, X, Y, RandomColor(rng), rng.uniform(1,10), lineType); imshow(windowName, image); //waitKey（DELAY）等待键盘输入，并延迟 if(waitKey(DELAY)>=0){ return(-1); } } return(0); }（4）使用随机数发生器绘制文字
int DrawingText(Mat& image, char windowName[], RNG rng){ int lineType = 8; Point org; for(int i=0; i<100; i++){ org.x = rng.uniform(1,500); org.y = rng.uniform(1,500); /* putText参数解释 image:绘制画板 “OpenCV Forever”:绘制的文字信息 org：绘制的文字的左上角坐标 rng.uniform(0,8):字体类型 rng.uniform(1,5):文字缩放比例 RandomColor(rng)：字体颜色 rng.uniform(1,10)：字体粗细 lineType：画线类型 */ putText(image, "OpenCV Forever", org, rng.uniform(0,8), rng.uniform(1,5), RandomColor(rng), rng.uniform(1,10), lineType); imshow(windowName, image); if(waitKey(DELAY)>=0){ return(-1); } } waitKey(0); return(0); }3.完整代码 Random.cpp
#include "CommonInclude.h" #define DELAY 10 static Scalar RandomColor(RNG rng){ return(Scalar(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255))); } int DrawingRandomLine(Mat& image, char windowName[], RNG rng){ if(!image.data){ cout << "more parameters are required!!!" << endl; return(-1); } int lineType = 8; Point X,Y; for(int i=0; i<100; i++){ //使用rng.uniform获取1-500的随机整数 X.x = rng.uniform(1,500); X.y = rng.uniform(1,500); Y.x = rng.uniform(1,500); Y.y = rng.uniform(1,500); line(image, X, Y, RandomColor(rng), rng.uniform(1,10), lineType); imshow(windowName, image); //waitKey（DELAY）等待键盘输入，并延迟 if(waitKey(DELAY)>=0){ return(-1); } } return(0); } int DrawingText(Mat& image, char windowName[], RNG rng){ int lineType = 8; Point org; for(int i=0; i<100; i++){ org.x = rng.uniform(1,500); org.y = rng.uniform(1,500); /* putText参数解释 image:绘制画板 “OpenCV Forever”:绘制的文字信息 org：绘制的文字的左上角坐标 rng.uniform(0,8):字体类型 rng.uniform(1,5):文字缩放比例 RandomColor(rng)：字体颜色 rng.uniform(1,10)：字体粗细 lineType：画线类型 */ putText(image, "OpenCV Forever", org, rng.uniform(0,8), rng.uniform(1,5), RandomColor(rng), rng.uniform(1,10), lineType); imshow(windowName, image); if(waitKey(DELAY)>=0){ return(-1); } } waitKey(0); return(0); } int main(int argc, char** argv){ int imageX; int cReturn; char windowName[] = "RandomDrawing"; cout << "Input size of image:"; cin >> imageX; Mat image = Mat::zeros(imageX,imageX,CV_8UC3); //实例化一个随机数生成器 RNG rng(0xFFFFFFFF); cReturn = DrawingRandomLine(image, windowName, rng); if(cReturn == -1){ cout << "end of the function!!!" << endl; return(-1); } cReturn = DrawingText(image, windowName, rng); if(cReturn == -1){ cout << "end of the function!!!" << endl; return(-1); } return(0); }CommonInclude.h
#ifndef COMMON_INCLUDE #define COMMON_INCLUDE #include<iostream> #include<opencv2/core/core.hpp> #include<opencv2/highgui/highgui.hpp> #include<opencv2/imgproc/imgproc.hpp> using namespace std; using namespace cv; #endif参考文献 1.http://www.opencv.org.cn/opencvdoc/2.3.2/html/doc/tutorials/core/random_generator_and_text/random_generator_and_text.html#drawing-2
