1、图像显示

#include<opencv2/opencv.hpp>
using namespace cv; //使用命名空间
void main(){Mat srcImage = imread('1.jpg');//载入图像imshow('图像标题',srcImage);//显示图像waitKey(0);//等待按键按下  
}

2、图像腐蚀

#include <opencv2/opencv.hpp>  
#include <opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;
int main()
{Mat srcImage = imread("E:\\4.JPG");imshow("原图--腐蚀操作", srcImage);Mat element = getStructuringElement(MORPH_RECT, Size(15, 15));Mat dsImage;erode(srcImage, dsImage, element);  //腐蚀函数imshow("效果图", dsImage);waitKey(0);return 0;
}

3、图像模糊

#include <opencv2/opencv.hpp>  
#include <opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;int main()
{Mat srcImage = imread("E:\\4.JPG");imshow("原图--腐蚀操作", srcImage);Mat dsImage;blur(srcImage, dsImage, Size(7, 7)); //进行滤波操作imshow("效果图", dsImage);waitKey(0);return 0;
}

4、边缘检测

#include <opencv2/opencv.hpp>  
#include <opencv2/highgui/highgui.hpp>
using namespace std;
using namespace cv;int main()
{Mat srcImage = imread("E:\\4.JPG");imshow("原图--腐蚀操作", srcImage);Mat dsImage,grayImage,edge;//创建与原图同类型和大小的矩阵dstdsImage.create(srcImage.size(), srcImage.type());//将原图转化为灰度图像cvtColor(srcImage, grayImage, CV_BGR2GRAY);//使用3*3内核降噪blur(grayImage, edge, Size(3, 3));//运行canny算子Canny(edge,edge,3,9,3);imshow("效果图", edge);waitKey(0);return 0;
}

5、读取视频或调用摄像头

int main()
{//初始化VideoCapture capture("E://1.avi");//调用摄像头//VideoCapture capture(0);//循环每一帧，相当一张图while (1) {Mat frame;capture >> frame;//存储每一帧imshow("视频", frame);waitKey(50);//50ms}return 0;
}

6、写视频文件

int main() {  IplImage *iplImg = cvLoadImage("/home/huanglei/wr.jpg", 1);  IplImage *iplImgNew = cvCreateImage(cvSize(320,240),8,3) ;  //改变图片大小适应视频  cvResize(iplImg,iplImgNew,CV_INTER_LINEAR) ;  CvVideoWriter* video = cvCreateVideoWriter("/home/huanglei/tree1.avi",  CV_FOURCC('P', 'I', 'M', '1'), 20,  cvSize(iplImgNew->width, iplImgNew->height), 1);  /* * 逐帧读取视频，并保存到另外一个视频文件中 */  CvCapture *cap;  cap = cvCreateFileCapture("/home/huanglei/tree.avi");  IplImage *imgVideo ;  int q ;  while (imgVideo = cvQueryFrame(cap)) {  q = cvWriteFrame(video, imgVideo);  }  /* * 在新的视频文件的末尾插入图片 */  int i;  for (int x = 0; x < 50; x++) {  i = cvWriteFrame(video, iplImgNew);  }  /* * 释放指针 */  if (video) {  cvReleaseVideoWriter(&video);  cvReleaseImage(&imgVideo);  cvReleaseImage(&imgVideo);  cvReleaseImage(&iplImg);  }  return 0;  
}