运行程序在原图像上画个入侵检测的方框，有运动目标进入方框产生报警，并将入侵时的帧保存为视频
程序如下：
// 26RuQinDetection_BaseTwoDiff.cpp : 定义控制台应用程序的入口点。
// 区域入侵检测，基于两帧差分法
#include "stdafx.h"
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>
//CAM定义用摄像头获得视频else文件
//#define CAM
int apos=30;
CvRect box;
bool Drawing=false;
bool out=false;
int xx1,xx2,yy1,yy2;
int n=0;
CvVideoWriter* writer;//保存视频
CvFont font; //字体
void DrawRect(IplImage*img,CvRect rect)
{
xx1=box.x;
xx2=box.x +box.width ;
yy1=box.y ;
yy2=box.y +box.height ;
cvRectangle(img,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0x00,0xff,0x00),2);
}
//实现对窗口Window_Name上的对象param添加鼠标响应操作
void my_mouse_callback(int event,int x,int y,int flags,void* param)
{
IplImage*img=(IplImage*)param;
switch(event)
{
case CV_EVENT_MOUSEMOVE:
{
if(Drawing)
{
box.width=x-box.x;
box.height=y-box.y;
}
}
break;
case CV_EVENT_LBUTTONDOWN:
{
Drawing=true;
box=cvRect(x,y,0,0);
}
break;
case CV_EVENT_LBUTTONUP:
{
Drawing=false;
if (box.width<0)
{
box.x+=box.width;
box.width*=-1;
}
if (box.height<0)
{
box.y+=box.height;
box.height*=-1;
}
out=true;
DrawRect(img,box);
}
break;
}
}
void on_trackbar(int pos)
{
apos=pos;
}
int main( int argc, char** argv )
{
//声明IplImage指针
IplImage* pFrame = NULL; //原始视频帧
IplImage* pFrImg = NULL; //提取的前景图像，即运动目标
IplImage* pBkImg = NULL; //背景图像
CvMat* pFrameMat = NULL; //原始视频矩阵
CvMat* pFrMat = NULL; //前景矩阵
CvMat* pBkMat = NULL; //背景矩阵
CvCapture* pCapture = NULL;
//帧数
int nFrmNum = 0;
box=cvRect(0,0,-1,-1);
CvScalar s;
int i, j;
cvInitFont(&font, CV_FONT_HERSHEY_COMPLEX, 1.0, 1.0, 0, 2, 8);
//创建窗口
cvNamedWindow("video", 1);
//cvNamedWindow("background",1);
cvNamedWindow("foreground",1);
//使窗口有序排列
cvMoveWindow("video", 30, 0);
//cvMoveWindow("background", 360, 0);
cvMoveWindow("foreground", 690, 0);
// 滑动条
//int nThreshold = 30;
cvCreateTrackbar("阀值", "foreground", &apos, 100, on_trackbar);
#ifdef CAM
if( !(pCapture = cvCaptureFromCAM(0)))
{
//pCapture = cvCaptureFromCAM(-1))
fprintf(stderr, "Can not open CAM .\n");
return -2;
}
#else
char *filename="../../0VideoSource/zjk_out.avi";
if( !(pCapture = cvCaptureFromAVI(filename)))
{
//pCapture = cvCaptureFromCAM(-1))
fprintf(stderr, "Can not open file %s.\n",filename);
return -2;
}
#endif
pFrame = cvQueryFrame( pCapture );
IplImage*temp1=cvCloneImage(pFrame);
cvSetMouseCallback("video",my_mouse_callback,(void*)pFrame);
while(out==false)
{
cvCopyImage(pFrame,temp1);
if(Drawing)
DrawRect(temp1,box);
cvShowImage("video",temp1);
if(cvWaitKey(100)==27)
break;
}
printf("%d,%d,%d,%d,",xx1,xx2,yy1,yy2);
//创建视频
writer = cvCreateVideoWriter( "zjk_out.avi", CV_FOURCC('M','J','P','G'), 27, cvSize(pFrame->width, pFrame->height));
//逐帧读取视频
while(pFrame = cvQueryFrame( pCapture ))
{
nFrmNum++;
n=0;
//如果是第一帧，需要申请内存，并初始化
if(nFrmNum == 1)
{
pBkImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pFrImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pBkMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrameMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
//转化成单通道图像再处理
cvCvtColor(pFrame, pBkImg, CV_BGR2GRAY); //第一帧作为背景了
//cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY); //
//转换成矩阵
cvConvert(pBkImg, pFrameMat); //虽然没用，相当于给矩阵赋了初值
cvConvert(pBkImg, pFrMat); //虽然没用，相当于给矩阵赋了初值
cvConvert(pBkImg, pBkMat);
}
else
{
cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
cvConvert(pFrImg, pFrameMat);
//高斯滤波先，以平滑图像
//cvSmooth(pFrameMat, pFrameMat, CV_GAUSSIAN, 3, 0, 0);
//当前帧跟背景图相减 计算两个数组差的绝对值
cvAbsDiff(pFrameMat, pBkMat, pFrMat);
//二值化前景图
cvThreshold(pFrMat, pFrImg, apos, 255.0, CV_THRESH_BINARY);
//进行形态学滤波，去掉噪音 只有摄像头时候会用
#ifdef CAM
cvErode(pFrImg, pFrImg, 0, 1);
cvDilate(pFrImg, pFrImg, 0, 1);
/* cvDilate(pFrImg, pFrImg, 0, 1);
cvErode(pFrImg, pFrImg, 0, 1);*/
#endif
//更新背景
//cvRunningAvg(pFrameMat, pBkMat, 0.003, 0);
//将背景转化为图像格式，用以显示
//cvConvert(pBkMat, pBkImg);
cvCopy(pFrameMat,pBkMat,NULL);
//pBkMat=pFrameMat;
//显示图像
for(j = xx1; j < xx2; j++)
for(i = yy1; i < yy2; i++)
{
s = cvGet2D(pFrImg,i,j);
if (s.val[0]==0xff)//0xff为白色的
{
n++;
}
}
printf("n=%d\n",n);
//没有目标入侵
if(n<=50)
{
//在原图像上画框
cvRectangle(pFrame,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0x00,0xff,0x00),2);
//在二值化前景图上画框
cvRectangle(pFrImg,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0xff,0xff,0xff),2);
}
else //有目标入侵
{
//在原图像上报警并保存视频
cvRectangle(pFrame,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0x00,0x00,0xff),2);
cvPutText(pFrame, "warning!", cvPoint(0,20), &font, CV_RGB(255,0,0));
cvWriteFrame(writer, pFrame);//将图像写入视频
//在二值化前景图上报警
cvRectangle(pFrImg,cvPoint(box.x,box.y),cvPoint(box.x+box.width,box.y+box.height),cvScalar(0xff,0xff,0xff),2);
cvPutText(pFrImg, "warning!", cvPoint(0,20), &font, CV_RGB(255,255,255));
}
cvShowImage("video", pFrame);
//cvShowImage("background", pBkImg);
cvShowImage("foreground", pFrImg);
//如果有按键事件，则跳出循环
//此等待也为cvShowImage函数提供时间完成显示
//等待时间可以根据CPU速度调整
if( cvWaitKey(100) >= 0 )
{
printf("into wait if");
//break;
}
}
}
cvWaitKey();
//销毁窗口
cvDestroyWindow("video");
//cvDestroyWindow("background");
cvDestroyWindow("foreground");
//释放图像和矩阵
cvReleaseImage(&pFrImg);
cvReleaseImage(&pBkImg);
cvReleaseMat(&pFrameMat);
cvReleaseMat(&pFrMat);
cvReleaseMat(&pBkMat);
cvReleaseCapture(&pCapture);
cvReleaseVideoWriter(&writer);
return 0;
}
结果如下：
