/************************************************************************
*?Copyright（c）?2011??Yang?Xian
*?All?rights?reserved.
*
*?File:	extractForeground.cpp
*?Brief:?提取視頻中的前景物體
*?Version:?1.0
*?Author:?Yang?Xian
*?Email:?xyang2011@sinano.ac.cn
*?Date:	2011/11/19
*?History:
************************************************************************/
#include?
#include?
#include?

#include?
#include?

using?namespace?std;
using?namespace?cv;

void?processing（Mat?&frame?Mat?&output）;

string?windowResult?=?“Extracting?foreground?object“;
string?windowSource?=??“Original?Video“;
Mat?gray;	//?當前灰度圖片
Mat?background;	//?累積背景
Mat?backImage;	//?背景圖片
Mat?foreground;	//?前景圖片
double?learningRate?=?0.01;	//?控制背景累積學習的速率
int?nThreshold?=?30;	//?前景提取的閾值

int?main（）
{
	Mat?frame;
	Mat?result;

//?	CvCapture*?capture?=?cvCaptureFromCAM（?-1?）;	//?攝像頭讀取文件開關
	VideoCapture?capture（“bike.avi“）;

	if（capture.isOpened（）/*capture*/）	//?攝像頭讀取文件開關
	{
		while（true）
		{
//?			frame?=?cvQueryframe（?capture?）;	//?攝像頭讀取文件開關
			capture?>>?frame;

			if（!frame.empty（））
			{?
				processing（frame?result）;
			}
			else
			{?
				printf（“?--（!）?No?captured?frame?--?Break!“）;
				break;
			}

			int?c?=?waitKey（100）;
			if（?（char）c?==?27?）
			{
				break;?
			}?
		}
	}
	return?0;
}

void?processing（Mat?&frame?Mat?&output）
{
	cvtColor（frame?gray?CV_BGR2GRAY）;
	//?對于第一幀，初始化背景
	if?（background.empty（））
	{
		gray.convertTo（background?CV_32F）;
	}
	background.convertTo（backImage?CV_8U）;
	//?計算當前圖片和背景的差別
	absdiff（backImage?gray?foreground）;
	//?對得到的前景進行閾值選取，去掉偽前景
	threshold（foreground?output?nThreshold?255?THRESH_BINARY_INV）;
	//?實時更新背景
	accumulateWeighted（gray?background?learningRate?output）;

	imshow（windowSource?frame）;
	imshow（windowResult?output）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????446600??2011-02-16?14:14??ExtractForeground\Debug\bike.avi

?????文件??????46080??2011-11-19?16:00??ExtractForeground\Debug\ExtractForeground.exe

?????文件?????368952??2011-11-19?16:00??ExtractForeground\Debug\ExtractForeground.ilk

?????文件?????797696??2011-11-19?16:00??ExtractForeground\Debug\ExtractForeground.pdb

?????文件?????446600??2011-02-16?14:14??ExtractForeground\ExtractForeground\bike.avi

?????文件???????6374??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\BuildLog.htm

?????文件????????621??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\ExtractForeground.exe.intermediate.manifest

?????文件??????70290??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\extractForeground.obj

?????文件?????????67??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\mt.dep

?????文件?????330752??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\vc90.idb

?????文件?????495616??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug\vc90.pdb

?????文件???????2060??2011-11-19?16:21??ExtractForeground\ExtractForeground\extractForeground.cpp

?????文件???????3769??2011-11-19?15:41??ExtractForeground\ExtractForeground\ExtractForeground.vcproj

?????文件???????1423??2011-11-19?16:22??ExtractForeground\ExtractForeground\ExtractForeground.vcproj.HP98402794308.Administrator.user

?????文件????2878464??2011-11-19?16:22??ExtractForeground\ExtractForeground.ncb

?????文件????????917??2011-11-19?15:26??ExtractForeground\ExtractForeground.sln

????..A..H.??????9216??2011-11-19?16:22??ExtractForeground\ExtractForeground.suo

?????目錄??????????0??2011-11-19?16:00??ExtractForeground\ExtractForeground\Debug

?????目錄??????????0??2011-11-19?16:00??ExtractForeground\Debug

?????目錄??????????0??2011-11-19?16:21??ExtractForeground\ExtractForeground

?????目錄??????????0??2011-11-19?15:43??ExtractForeground

-----------?---------??----------?-----??----

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