Opencv 讀視頻文件和運(yùn)動(dòng)物體檢測(cè)讀視頻文件和運(yùn)動(dòng)物體檢測(cè)

1、讀視頻文件和運(yùn)動(dòng)物體檢測(cè)例程簡(jiǎn)要說明：本程序 嘗試打開本電腦上的攝像頭作為視頻輸入設(shè)備，或者將命令行的輸入?yún)?shù)作為文件名來打開的視頻文件。不管是哪一種方法，最終都是不斷的循環(huán)處理一幀一幀地處理，涉及到的圖像處理有背景擦除，平滑濾波，二值化等。/* 背景建模，運(yùn)動(dòng)物體檢測(cè)*/* opencv example* by shiqi yu 2006*/#include <stdio.h>#include <cv.h> #include <cxcore.h> #include <highgui.h>int main( int argc, char* arg

2、v )/聲明iplimage 指針iplimage* pframe = null; iplimage* pfrimg = null; iplimage* pbkimg = null;cvmat* pframemat = null; cvmat* pfrmat = null; cvmat* pbkmat = null;cvcapture* pcapture = null;int nfrmnum = 0;/創(chuàng)建窗口cvnamedwindow(“video“, 1); cvnamedwindow(“background“,1); cvnamedwindow(“foreground“,1);/使窗口有

3、序排列if( !(pcapture = cvcapturefromfile(argv1)fprintf(stderr, “can not open video file %sn“, argv1); return -2;/逐幀讀取視頻while(pframe = cvqueryframe( pcapture )nfrmnu+m+;/假如是第一幀，需要申請(qǐng)內(nèi)存，并初始化if(nfrmnum = 1)pbkimg = cvcreateimage(cvsize(pframe->width, pframe->height), ipl_depth_8u,1);pfrimg = cvcreate

4、image(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);cvmovewindow(“video“, 30,

5、0);cvmovewindow(“background“, 360, 0);cvmovewindow(“foreground“, 690, 0);if( argc > 2 )fprint(fstderr, “usage: bkgrd video_file_name n“); return -1;/打開攝像頭if (argc =1)if( !(pcapture = cvcapturefromcam(-1)fprintf(stderr, “can not open camera.n“); return -2;/打開視頻文件if(argc = 2)/轉(zhuǎn)化成單通道圖像再處理cvcvtcolor(

6、pframe, pbkimg, cv_bgr2gray); cvcvtcolor(pframe, pfrimg, cv_bgr2gray);elsecvconvert(pfrimg, pframemat); cvconvert(pfrimg, pfrmat); cvconvert(pfrimg, pbkmat);cvcvtcolor(pframe, pfrimg, cv_bgr2gray); cvconvert(pfrimg, pframemat);/高斯濾波先，以平滑圖像/cvsmooth(pframemat, pframemat, cv_gaussian, 3, 0, 0);/進(jìn)行形態(tài)學(xué)濾

7、波，去掉噪音/cverode(pfrimg, pfrimg, 0, 1);/cvdilate(pfrimg, pfrimg, 0, 1);/更新背景cvrunningavg(pframemat, pbkmat, 0.003, 0);/將背景轉(zhuǎn)化為圖像格式，用以顯示cvconvert(pbkmat, pbkimg);/顯示圖像cvshowimage(“video“, pframe);cvshowimage(“background“, pbkimg); cvshowimage(“foreground“, pfrimg);/假如有按鍵大事，則跳出循環(huán)/此等待也為cvshowimage 函數(shù)供應(yīng)時(shí)間完

8、成顯示/等待時(shí)間可以依據(jù)cpu 速度調(diào)整if( cvwaitkey(2) >= 0 )break ;/當(dāng)前幀跟背景圖相減cvabsdiff(pframemat, pbkmat, pfrmat);/二值化前景圖cvthreshold(pfrmat, pfrimg, 60, 255.0, cv_thresh_binary);編輯python2.4windowsxp# -*- coding: cp936 -*- # # 背景建模，運(yùn)動(dòng)物體檢測(cè)# #import sys# import the necessary things for opencvfrom opencv.cv import *f

9、rom opencv.highgui import *ifname= ”main”:/銷毀窗口cvdestroywindow(“video“); cvdestroywindow(“background“); cvdestroywindow(“foreground“);/釋放圖像和矩陣cvreleaseimage(&pfrimg); cvreleaseimage(&pbkimg);cvreleasemat(&pframemat); cvreleasemat(&pfrmat); cvreleasemat(&pbkmat);cvreleasecapture(&

10、amp;pcapture);return 0;sys.exit(1)#打開視頻文件#pcapture = cvcapturefromfile(sys.argv1) if not pcapture: #print(“can not open video file.“) sys.exit(1)#逐幀讀取視頻while 1:pframe = cvqueryframe( pcapture )if not pframe:print(“can not open frame.“)sys.exit(1)nfrmnum = nfrmnum1+print(nfrmnum)#假如是第一幀，需要申請(qǐng)內(nèi)存，并初始化if

11、 nfrmnum = 1:pbkimg = cvcreateimage(cvsize(pframe.width,pframe.height), ipl_depth_8u,1)pbkimg = none pfrimg = nonepbkmat = none pfrmat = none pframemat = nonenfrmnum = 0#創(chuàng)建窗口cvnamedwindow(“video“, 1) cvnamedwindow(“background“,1) cvnamedwindow(“foreground“,1)#使窗口有序排列cvmovewindow(“video“, 30, 0)cvmov

12、ewindow(“background“, 360, 0)cvmovewindow(“foreground“, 690, 0)#打開攝像頭pcapture = cvcreatecameracapture(0)if not pcapture:print(“can not open camera.“)#當(dāng)前幀跟背景圖相減cvabsdiff(pframemat, pbkmat, pfrmat)#二值化前景圖cvthreshold(pfrmat, pfrimg6,0, 255.0, cv_thresh_binary)#進(jìn)行形態(tài)學(xué)濾波，去掉噪音cverode(pfrimg, pfrimgn,one, 1

13、)cvdilate(pfrimg, pfrimgn,one, 1)#更新背景cvrunningavg(pframemat, pbkmat,0.003, none)#將背景轉(zhuǎn)化為圖像格式，用以顯示cvconvert(pbkmat, pbkimg)#顯示圖像cvshowimag“eb(ackground“, pbkimg)cvshowimag“ef(oreground“, pfrimg)pfrimg =cvcreateimage(cvsize(pframe.width, pframe.height), ipl_depth_8u,1)pbkmat = cvcreatemat(pframe.heigh

14、t, pframe.width, cv_32fc1) pfrmat = cvcreatemat(pframe.height, pframe.width, cv_32fc1) pframemat = cvcreatemat(pframe.height, pframe.width, cv_32fc1)#轉(zhuǎn)化成單通道圖像再處理cvcvtcolor(pframe, pbkimg, cv_bgr2gray) cvcvtcolor(pframe, pfrimg, cv_bgr2gray)cvconvert(pfrimg, pframemat) cvconvert(pfrimg, pfrmat) cvcon

15、vert(pfrimg, pbkmat)else :cvcvtcolor(pframe, pfrimg, cv_bgr2gray) cvconvert(pfrimg, pframemat)#高斯濾波先，以平滑圖像cvsmooth(pframemat, pframemat, cv_gaussian3, 0, 0)cvflip(pframen,one,0)cvflip(pbkimgn,one,0)cvflip(pfrimgn,one,0)cvshowimag“ev(ideo“,pframe)cvreleasecapture(pcapture)sys.exit(0)#假如有按鍵大事，則跳出循環(huán)此等待也為cvshowimage 函數(shù)供應(yīng)時(shí)間完成顯示等待時(shí)間可以依據(jù)cpu 速度調(diào)