opencv輪廓提取與輪廓擬合

opencv輪廓提取與輪廓擬合#include<iostream>#include<vector>#include<opencv2/core/core.hpp>#include<opencv2/imgproc/imgproc.hpp>#include<opencv2/highgui/highgui.hpp>usingnamespacestd;usingnamespacecv;intmain(){//ReadinputbinaryimageMatimage二imread("./binaryGroup.bmp",O);if(!image.data)return0;namedWindow("BinaryImage");imshow("BinaryImage",image);//Getthecontoursoftheconnectedcomponentsvector<vector<Point>>contours;//findContours的輸入是二值圖像findContours(image,contours,//avectorofcontoursCV_RETR_EXTERNAL,//retrievetheexternalcontoursCV_CHAIN_APPROX_NONE);//retrieveallpixelsofeachcontours//Printcontours'length輪廓的個(gè)數(shù)cout<<"Contours:"<<contours.size()<<endl;vector<vector<Point>>::const_iteratoritContours二contours.begin();for(;itContours!二contours.end();++itContours){cout<<"Size:"<<itContours->size()<<endl;//每個(gè)輪廓包含的點(diǎn)數(shù)}//drawblackcontoursonwhiteimage

Matresult(image.size(),CV_8U,Scalar(0));drawContours(result,contours,//畫出輪廓-1,//drawallcontoursScalar(255),//inblack2);//withathicknessof2namedWindow("Contours");imshow("Contours",result);//Eliminatetooshortortoolongcontoursintcmin=100;//minimumcontourlengthintcmax=1000;//maximumcontourlengthvector<vector<Point>>::const_iteratoritc二contours.begin();while(itc!=contours.endO){if(itc->size()<cmin||itc->size()>cmax)itc二contours.erase(itc);else++itc;}//drawcontoursontheoriginalimageMatoriginal二imread("./group.bmp");drawContours(original,contours,-1,//drawallcontoursScalar(255,255,255),//inwhite2);//withathicknessof2namedWindow("ContoursonAnimals");imshow("ContoursonAnimals",original);//Let'snowdrawblackcontoursonwhiteimage//result.setTo(Scalar(0));//Ifthethirdparameterofthisfunctionisanegativevalue,thenallcontoursaredrawn.//Otherwise,itispossibletospecifytheindexofthecontourtobedrawndrawContours(result,contours,-1,//drawallcontoursScalar(255),//inblack1);//withathicknessof1image=imread("./binaryGroup.bmp",1);//testingtheboundingbox

Rectr0=boundingRect(Mat(contours[0]));//boundingRect獲取這個(gè)外接矩形rectangle(result,r0,Scalar(255,255,255),2);//testingtheenclosingcirclefloatradius;Point2fcenter;minEnclosingCircle(Mat(contours[l]),center,radius);//對(duì)輪廓進(jìn)行多變形逼近c(diǎn)ircle(result,Point(center),static_cast<int>(radius),Scalar(255),2);RotatedRectrrect二fitEllipse(Mat(contours[2]));ellipse(result,rrect,Scalar(255),2);//testingtheapproximatepolygonvector<Point>poly;approxPolyDP(Mat(contours[2]),poly,5,true);cout<<"Polygonsize:"<<poly.size()<<endl;////Iterateovereachsegmentanddrawitvector<Point>::const_iteratoritp二poly.begin();while(itp!=(poly.end()T)){line(result,*itp,*(itp+l),Scalar(255),2);++itp;}//lastpointlinkedtofirstpointline(result,*(poly.begin()),*(poly.end()-l),Scalar(20),2);//testingtheconvexhullvector<Point>hull;convexHull(Mat(contours[3]),hull);//Iterateovereachsegmentanddrawitvector<Point>::const_iteratorit二hull.begin();while(it!二(hull.end()-l)){line(result,*it,*(it+l),Scalar(255),2);++it;}//lastpointlinkedtofirstpointline(result,*(hull.begin()),*(hull.end()—l),Scalar(255),2);//testingthemoments

//iterateoverallcontoursitc二contours.begin();while(itc!=contours.endO){//computeallmomentsMomentsmom二moments(Mat(*itc++));//drawmasscentercircle(result,//positionofmasscenterconvertedtointegerPoint(mom.ml0/mom.m00,mom.m01/mom.m00),2,Scalar(255),2);//drawblackdot}namedWindow("SomeShapedescriptors");imshow("SomeShapedescriptors",result);//NewcalltofindContoursbutwithCV_RETR_LISTflagimage=imread("./binaryGroup.bmp",O);//GetthecontoursoftheconnectedcomponentsfindContours(image.contourscontours,//avectorofcontoursCV_RETR_LIST,//retrievetheexternalandinternalCV_CHAIN_APPROX_NONE);//retrieveallpixelsofeachcontours//drawblackcontoursonwhiteimageresult.setTo(Scalar(O));drawCon