OpenCV学习一一椭圆拟合分类：Opencv2011-06-0719:0046人阅读评论(0)收藏举报#include"cv.h"#inelude"highgui.h"intslider_pos=70;〃阈值IplImage*image02=0,*image03=0,*image04=0;voidprocess_image(inth);intmain(intargc,char**argv){constchar*filename="rice.png";if((image03=cvLoadlmage(filename,0))==0)〃读入图像为灰度图像{return-1;}image02=cvClonelmage(image03);image04=cvClonelmage(image03);cvNamedWindow("Source",1);cvNamedWindow("Result",1);cvShowImage("Source",image03);cvCreateTrackbar("Threshold","Result",&slider_pos,255,process，_image);process」mage(0);cvWaitKey(0);cvSaveImage("1.jpg",image04);cvReleaseImage(&image02);cvReleaseImage(&image03);cvDestroyWindow("Source");cvDestroyWindow("Result");return0;〃这个函数寻找出轮廓、用椭圆拟合画出voidprocess_image(inth){CvMemStorage*stor;CvSeq*cont;CvBox2D32f*box;CvPoint*PointArray;CvPoint2D32f*PointArray2D32f;stor=cvCreateMemStorage(O);cont=cvCreateSeq(CV_SEQ_ELTYPE_POINT,sizeof(CvSeq),sizeof(CvPoint),stor);cvThreshold(imageO3,imageO2,slider_pos,255,CV_THRESH_BINARY);cvFindContours(image02,stor，&cont,sizeof(CvContour),CV_RETR_LIST,CV_CHAIN_APPROX_NONE,cvPoint(O,O));cvZero(imageO2);cvZero(imageO4);〃绘制所有轮廓并用椭圆拟合for(;cont;cont=cont->h_next){inti;intcount=cont->total;〃轮廓个数CvPointcenter;CvSizesize;/*个数必须大于6,这是cvFitEllipse_32f的要求*/if(count<6){continue;}〃分配内存给点集PointArray=(CvPoint*)malloc(count*sizeof(CvPoint));PointArray2D32f=(CvPoint2D32f*)malloc(count*sizeof(CvPoint2D32f));〃分配内存给椭圆数据box=(CvBox2D32f*)malloc(sizeof(CvBox2D32f));〃得到点集(这个方法值得借鉴)cvCvtSeqToArray(cont,PointArray,CV_WHOLE_SEQ);〃将CvPoint点集转化为CvBox2D32f集合for(i=0;i
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关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
示center.x=cvRound(box->center.x);center.y=cvRound(box->center.y);size.width=cvRound(box->size.width*0.5);size.height=cvRound(box->size.height*0.5);box->angle=-box->angle;〃画椭圆cvEllipse(imageO4,center,size,box->angle,0,360,CV_RGB(0,0,255),1,CV_AA,0);free(PointArray);free(PointArray2D32f);free(box);}cvShowlmage("Result",imageO4);
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