互动投影代码逻辑（可单独定制）

#include <windows.h>
#include <iostream>


using namespace std; 

#include "camerads.h"  
#include "strsafe.h"
#include <highgui.h>
#include <stdlib.h>
#include <math.h>

using namespace cv; 
int pickering = 0;
int cvimg_show_source = 0;
int cvimg_show_diff = 0;
int index = 0;
int sensi = 100;
CvPoint a;
CvPoint b;
CvPoint c;
CvPoint d;
CvPoint pbegin;
CvPoint pend;

int ReadConfig(LPTSTR key)
{
	int m_nTest;
    LPTSTR strConfigFile; 
    strConfigFile = _T("C://config.ini");
    m_nTest = GetPrivateProfileInt(_T("Custom_Config"),key, -1, strConfigFile); //如果没有从配置文件中找到，则默认为0
	return m_nTest;
}
void SaveConfig( LPCTSTR lpKeyName, INT Value)
{
	LPTSTR strConfigFile; 
	TCHAR ValBuf[16];
    strConfigFile = _T("C://config.ini");
	StringCbPrintfW( ValBuf,sizeof(ValBuf) ,TEXT( "%i" ), Value);
    WritePrivateProfileString(_T("Custom_Config"),lpKeyName, ValBuf , strConfigFile);
}

void SaveConfig(LPTSTR key,LPTSTR val)
{
    LPTSTR strConfigFile; 
    strConfigFile = _T("C://config.ini");
    WritePrivateProfileString(_T("Custom_Config"),key, val , strConfigFile);
}
void save_config_int(LPTSTR key,int val){
	SaveConfig((LPTSTR)(key),val);
}
int read_config(LPCTSTR key){
	BEGIN:
	int re = ReadConfig((LPTSTR)(key));
	if(re == -1){
		save_config_int((LPTSTR)key,0);
		goto BEGIN;
	}
	return re;
}
void default_conf(
	int& index,
	CvPoint& a,
	CvPoint& b,
	CvPoint& c,
	CvPoint& d
){  

	index = 0;
	a.x=0;
	a.y=0;
	b.x=0;
	b.y=0;
	c.x=0;
	c.y=0;
	d.x=0;
	d.y=0;
}

void key_events(){
	if(GetAsyncKeyState(VK_ESCAPE)) { //esc
		pickering = 0;
    }
	if(GetAsyncKeyState( VK_F1 )) { //f1
		cvimg_show_source = 1;
    }
	if(GetAsyncKeyState(VK_F2)) { //f2
		cvimg_show_source = -1;
    }
	if(GetAsyncKeyState(VK_F3)) { //f3
		cvimg_show_diff = cvimg_show_diff?0:1;
    }
}


//鼠标点击
void mouse_click(int x,int y){
    SetCursorPos(x,y);//移动到某点坐标
    mouse_event(MOUSEEVENTF_LEFTDOWN,0,0,0,0);//点下左键
    mouse_event(MOUSEEVENTF_LEFTUP,0,0,0,0);//松开左键
}

void callback(int i,int j){
	float bai_x = 0,bai_y = 0;
	if(i - a.x >0 && i< b.x){
		if(b.x - a.x > 0){ 
			bai_x = (float)(i - a.x)/(b.x - a.x);
		}
	}
	if(j - a.y >0 && j< d.y){
		if(d.y - a.y > 0){ 
			bai_y = (float)(j - a.y)/(d.y - a.y);
		}
	}
	int x,y;
	if(pend.x - pbegin.x > 0){ 
		if(pend.y - pbegin.y > 0){  
				x = (int)(bai_x*(pend.x - pbegin.x) + pbegin.x);
				y = (int)(bai_y*(pend.y - pbegin.y) + pbegin.y);
				//MessageBox(NULL,TEXT("鼠标点击"),TEXT("warning"),0);
				//鼠标点击
				mouse_click(x,y); 
		}
	}
	
}


void onTrackerSlid(Mat &inputimage1, Mat &inputimage2, Mat &outputimage, int pos)
{
    uchar *data1 = NULL;
    uchar *data2 = NULL;
    uchar *data3 = NULL;
    //uchar *data = NULL;
    int i, j;
 
    outputimage = inputimage1.clone();
    int rowNumber = outputimage.rows;
    int colNumber = outputimage.cols*outputimage.channels();
    int step = outputimage.step/sizeof(uchar);
    data1 = (uchar*)inputimage1.data;
    data2 = (uchar*)inputimage2.data;
    data3 = (uchar*)outputimage.data;
 
    for(i = 0; i < rowNumber; i++)
    {
        //data = (uchar*)outputimage.ptr<uchar>(i);   //获取第i行的首地址
        for(j = 0; j < colNumber; j++)
        {
			if(fabs((float)(data2[i*step + j] - data1[i*step + j])) > pos){
                data3[i*step + j] = 255;
				callback(i,j);
				break;
			}
            else
                data3[i*step + j] = 0;
        }
    }
}

void frame_diff(IplImage* p1,IplImage* p2){
	Mat matp1 =  Mat(p1);
	Mat matp2 =  Mat(p2);
	Mat dist =  Mat(p1);
	
	//sensi = 100;
	onTrackerSlid(matp1,matp2,dist,sensi);
	if(cvimg_show_diff){
		imshow("dstimage", dist);
	}else{
		cvDestroyWindow("dstimage");
	}

	//IplImage img = IplImage(fmat);
	//namedWindow("foreground", CV_WINDOW_AUTOSIZE);
    //imshow("foreground", fmat);
}

int init(){
	//仅仅获取摄像头数目
	int m_iCamCount = CCameraDS::CameraCount();

	if(m_iCamCount == 0)
	{
		return (-1);
	}
	
	CCameraDS m_CamDS;
	IplImage *pFrame0 = NULL;
	IplImage *pFrame_1 = NULL;
	//获取所有摄像头的名称
	if(m_iCamCount <= index){
		MessageBox(NULL,TEXT("not found camera"),TEXT("warning"),0);
	}
	m_CamDS.OpenCamera(index, false, 320, 240);
	pickering = 1;
	int is_first = 1;
	while(1)
	{
		//获取键盘输入
		key_events();
		//获取一帧
		pFrame0 = m_CamDS.QueryFrame();
		if(is_first){
			pFrame_1 = pFrame0;
			is_first = 0;
		}
		frame_diff(pFrame0,pFrame_1);
		//cvCopy(pFrame0,pFrame_1);
		pFrame_1 = cvCloneImage(pFrame0);
		//显示
		if(cvimg_show_source == 1){
			cvNamedWindow("video");
			cvShowImage("video", pFrame0);
		}				
		if(cvimg_show_source == -1){
			cvDestroyWindow("video");
		}
 
		if (cvWaitKey(20) == 'q')
		{
			break;
		}
		if(!pickering){
			break;
		}
		Sleep(5);
	}
	m_CamDS.CloseCamera(); //可不调用此函数，CCameraDS析构时会自动关闭摄像头
	cvDestroyWindow("video");
	return 0;
}
void conf(){
	a.x = read_config(_T("a_x"));
	a.y = read_config(_T("a_y"));
	b.x = read_config(_T("b_x"));
	b.y = read_config(_T("b_y"));
	c.x = read_config(_T("c_x"));
	c.y = read_config(_T("c_y"));
	d.x = read_config(_T("d_x"));
	d.y = read_config(_T("d_y"));
	pbegin.x = read_config(_T("begin_x"));
	pbegin.y = read_config(_T("begin_y"));
	pend.x = read_config(_T("end_x"));
	pend.y = read_config(_T("end_y"));
	index = read_config(_T("index"));
	sensi = read_config(_T("sensi"));
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow){
	conf();
	init();
    return 0;
}