1、源**
#include "stdafx.h"
#include #include #include #include #include #include #include #include #include #include#include //跟蹤引數
const double mhi_duration = 0.5;//最大跟蹤時間
const double max_time_delta = 0.5;
const double min_time_delta = 0.05;
const int n = 3;
const int contour_max_aera = 100;//矩形面積
iplimage **buf = 0;
int last = 0;
int flag;
iplimage *mhi = 0; // mhi: motion history image
cvconnectedcomp *cur_comp, min_comp;
cvconnectedcomp comp;
cvmemstorage *storage;
cvpoint pt[4];
// dst – 檢測結果
void update_mhi(iplimage* img, iplimage* dst, int diff_threshold)
for (i = 0; i < n; i++)
cvreleaseimage(&mhi);
mhi = cvcreateimage(size, ipl_depth_32f, 1);
cvzero(mhi);
} cvcvtcolor(img, buf[last], cv_bgr2gray); //rgb->gray
idx1 = last;
idx2 = (last + 1) % n;
last = idx2;
// 做幀差
silh = buf[idx2];
cvabsdiff(buf[idx1], buf[idx2], silh); //兩幀差異
// 對差影象做二值化
cvthreshold(silh, silh, 30, 255, cv_thresh_binary); //src(x,y)>threshold ,dst(x,y) = max_value; 否則,dst(x,y)=0;
cvupdatemotionhistory(silh, mhi, timestamp, mhi_duration); //更新畫素點的運動歷史
cvcvtscale(mhi, dst, 255. / mhi_duration,
(mhi_duration - timestamp)*255. / mhi_duration);//timestamp是時間戳;mhi_duration,獲得的是當前時間
cvcvtscale(mhi, dst, 255. / mhi_duration, 0);
// 中值濾波,消除小的雜訊
cvsmooth(dst, dst, cv_median, 3, 0, 0, 0);
// 向下取樣,去掉雜訊
cvpyrdown(dst, pyr, 7);
cvdilate(pyr, pyr, 0, 1); // 做膨脹操作,消除目標的不連續空洞
cvpyrup(pyr, dst, 7);
// // 下面的程式段用來找到輪廓
// // create dynamic structure and sequence.
stor = cvcreatememstorage(0);
cont = cvcreateseq(cv_seq_eltype_point, sizeof(cvseq), sizeof(cvpoint), stor);
// 找到所有輪廓
cvfindcontours(dst, stor, &cont, sizeof(cvcontour),
// 直接使用contour中的矩形來畫輪廓
for (; cont; cont = cont->h_next)
else
}cvreleasememstorage(&stor);
cvreleaseimage(&pyr);
}int main(int argc, char** argv)
}update_mhi(image, motion, 6);
cvputtext(image, t_y, cvpoint(10, 25), &font, cv_rgb(255, 0, 0));
cvshowimage("motion", image);
if (cvwaitkey(10) >= 0)
break;
}cvreleasecapture(&capture);
cvdestroywindow("motion");
} }return 0;
}
2、實驗結果
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