资源简介
基于帧间差分法的运动目标检测vc源代码,调用OpenCV编程实现,文件中包含运行时所要的运动视频。
代码片段和文件信息
#include “cv.h“
#include “highgui.h“
#include
#include
#include
#include
#include
// various tracking parameters (in seconds)
const double MHI_DURATION = 0.5;
const double MAX_TIME_DELTA = 0.5;
const double MIN_TIME_DELTA = 0.05;
const int N = 3;
//
const int CONTOUR_MAX_AERA = 16;
// ring image buffer
IplImage **buf = 0;
int last = 0;
// temporary images
IplImage *mhi = 0; // MHI: motion history image
CvFilter filter = CV_GAUSSIAN_5x5;
CvConnectedComp *cur_comp min_comp;
CvConnectedComp comp;
CvMemStorage *storage;
CvPoint pt[4];
// 参数:
// img – 输入视频帧
// dst – 检测结果
void update_mhi( IplImage* img IplImage* dst int diff_threshold )
{
double timestamp = clock()/100.; // get current time in seconds
CvSize size = cvSize(img->widthimg->height); // get current frame size
int i j idx1 idx2;
IplImage* silh;
uchar val;
float temp;
IplImage* pyr = cvCreateImage( cvSize((size.width & -2)/2 (size.height & -2)/2) 8 1 );
CvMemStorage *stor;
CvSeq *cont *result *squares;
CvSeqReader reader;
if( !mhi || mhi->width != size.width || mhi->height != size.height )
{
if( buf == 0 )
{
buf = (IplImage**)malloc(N*sizeof(buf[0]));
memset( buf 0 N*sizeof(buf[0]));
}
for( i = 0; i < N; i++ )
{
cvReleaseImage( &buf[i] );
buf[i] = cvCreateImage( size IPL_DEPTH_8U 1 );
cvZero( buf[i] );
}
cvReleaseImage( &mhi );
mhi = cvCreateImage( size IPL_DEPTH_32F 1 );
cvZero( mhi ); // clear MHI at the beginning
} // end of if(mhi)
cvCvtColor( img buf[last] CV_BGR2GRAY ); // convert frame to grayscale
idx1 = last;
idx2 = (last + 1) % N; // index of (last - (N-1))th frame
last = idx2;
// 做帧差
silh = buf[idx2];
cvAbsDiff( buf[idx1] buf[idx2] silh ); // get difference between frames
// 对差图像做二值化
cvThreshold( silh silh 30 255 CV_THRESH_BINARY ); // and threshold it
cvUpdateMotionHistory( silh mhi timestamp MHI_DURATION ); // update MHI
cvCvtScale( mhi dst 255./MHI_DURATION
(MHI_DURATION - timestamp)*255./MHI_DURATION );
cvCvtScale( mhi dst 255./MHI_DURATION 0 );
// 中值滤波,消除小的噪声
cvSmooth( dst dst CV_MEDIAN 3 0 0 0 );
// 向下采样,去掉噪声
cvPyrDown( dst pyr 7 );
cvDilate( pyr pyr 0 1 ); // 做膨胀操作,消除目标的不连续空洞
cvPyrUp( pyr dst 7 );
//
// 下面的程序段用来找到轮廓
//
// Create dynamic structure and sequence.
stor = cvCreateMemStorage(0);
cont = cvCreateSeq(CV_SEQ_ELTYPE_POINT sizeof(CvSeq) sizeof(CvPoint) stor);
// 找到所有轮廓
cvFindContours( dst stor &cont sizeof(CvContour)
CV_RETR_LIST CV_CHAIN_APPROX_SIMPLE cvPoint(00));
/*
for(;cont;cont = cont->h_next)
{
// Number point must be more than or equal to 6 (for cvFitEllipse_32f).
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 140 2007-02-24 14:01 运动目标检测\Makefile
文件 4905 2007-02-24 14:02 运动目标检测\motiondetect.c
文件 4220 2007-03-07 20:41 运动目标检测\motiondetect.dsp
文件 549 2007-03-07 20:41 运动目标检测\motiondetect.dsw
文件 432700 2006-09-05 00:10 运动目标检测\video.avi
目录 0 2010-04-24 23:51 运动目标检测
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