opencv3/C++绘制几何图形实例
在图像上绘制几何图形
#include#include usingnamespacecv; Matsrc1,dst; voiddrawRectangle(); voiddrawLine(); voiddrawEllipse(); voiddrawCircle(); voidtsxt(); intmain() { src1=imread("E:/image/image/daibola.jpg"); dst=src1.clone(); if(src1.empty()) { printf("cannotloadimage\n"); return-1; } drawRectangle(); drawLine(); drawEllipse(); drawCircle(); tsxt(); cvNamedWindow("output",CV_WINDOW_AUTOSIZE); imshow("output",dst); waitKey(); return0; } voiddrawRectangle() { Rectrect=Rect(150,30,250,250); Scalarcolor=Scalar(0,255,255); rectangle(dst,rect,Scalar(0,255,255),2); } voiddrawLine() { line(dst,Point(450,0),Point(450,150),Scalar(255,0,50),2); } voiddrawEllipse() { ellipse(dst,Point(100,100),Size(50,90),0.0,0.0,360,Scalar(255,255,0),2); } voiddrawCircle() { circle(dst,Point(100,100),60,Scalar(255,0,255),2); } voidtsxt() { putText(dst,"Image",Point(300,330),5,3.0,Scalar(255,0,90),2); }
随机绘制大小不等的圆：
#includeusingnamespacecv; Matdst,src1; voidrandomCircle(); intmain() { src1=imread("E:/image/image/daibola.jpg"); dst=Mat::zeros(src1.size(),src1.type()); randomCircle(); return0; } voidrandomCircle() { RNGrng(0); Pointp1; intr; for(inti=0;i<10000;i++) { p1.x=rng.uniform(0,dst.cols); p1.y=rng.uniform(0,dst.rows); r=rng.uniform(0,dst.rows/3); Scalarcolor=Scalar(rng.uniform(0,255),rng.uniform(0,255),rng.uniform(0,255)); if(waitKey(100)>0) { break; } circle(dst,p1,r,color,2); imshow("circle",dst); } }
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