Opencv处理图像之轮廓提取
本文实例为大家分享了Opencv处理图像之轮廓提取,使用cvfindContours对图像进行轮廓检测,供大家参考,具体内容如下
#include<iostream>
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
int main()
{
IplImage* img = cvLoadImage("E:\\test.bmp",0);
IplImage* imgColor = cvCreateImage(cvGetSize(img),8,3);
IplImage* contoursImage = cvCreateImage(cvSize(img->width,img->height),8,1);
cvNamedWindow("hui");
cvShowImage("hui",img);
cvThreshold(img,img,100,255,CV_THRESH_BINARY); //二值化图像以100为阀值
cvNamedWindow("2");
cvShowImage("2",img);
CvSeq* contours = 0,* contoursTemp =0;
cvZero(contoursImage);
cvCvtColor(img,imgColor,CV_GRAY2BGR); //颜色转化函数
//img :需要提前的图片需要二值
//storage:存放的空间
//contours:指向轮廓提取的第一个轮廓
//sizeof(CvContour):采用的是哪一种结构以及大小
//CV_RETR_LIST:轮廓存储方式
//CV_CHAIN_APPROX_NONE:采用坐标集表示轮廓
CvMemStorage* storage = cvCreateMemStorage(0);
int total = cvFindContours(img,storage,&contours,sizeof(CvContour),CV_RETR_LIST,CV_CHAIN_APPROX_NONE,cvPoint(0,0));
printf("%d",total); //输出总的轮廓数
contoursTemp = contours;
while(contoursTemp!=0){
for(int i = 0;i<contoursTemp->total;i++){
CvPoint *pt = (CvPoint*)cvGetSeqElem(contoursTemp,i);
cvSetReal2D(contoursImage,pt->y,pt->x,255.0);
cvSet2D(imgColor,pt->y,pt->x,cvScalar(0,0,255.0));
}
contoursTemp = contoursTemp->h_next;
}
cvNamedWindow("img");
cvShowImage("img",imgColor);
cvNamedWindow("contoursImage");
cvShowImage("contoursImage",contoursImage);
cvWaitKey(0);
return 0;
}
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