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ECG recording, storing, filtering and recognition

, 14 Apr 2004
Full open code project for making driver and application software for ECG medical measurements.
ecg_dsp_src.zip
drvECG_1
drvECG_1.clw
drvECG_1.def
drvECG_1.dsp
drvECG_1.dsw
drvECG_1.exp
drvECG_1.ilk
drvECG_1.lib
res
Ecg_1
ECG_1.clw
ECG_1.dsp
ECG_1.dsw
ECG_DRAW.obj
ECG_Statistic_View.lib
ECG_VIEW.exp
ECG_VIEW.ilk
ECG_VIEW.lib
TestOCX.ocx
drvECG_1.exp
drvECG_1.ilk
drvECG_1.lib
resource.hm
res
ECG_1.ico
bitmap1.bmp
bmp00001.bmp
setup.bmp
ECG_Statistic_View
ECG_Statistic_View.clw
ECG_Statistic_View.def
ECG_Statistic_View.dsp
ECG_Statistic_View.dsw
res
ECG_VIEW
ECG_DRAW.obj
ECG_VIEW.APS
ECG_VIEW.clw
ECG_VIEW.def
ECG_VIEW.dll
ECG_VIEW.dsp
ECG_VIEW.dsw
ECG_VIEW.exp
ECG_VIEW.lib
res
testrecord2.zip
test_file1.zip
// ECG_DRAW.cpp: implementation of the ECG_DRAW class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ECG_DRAW.h"
#include "Person.h"
#include "stdio.h"
#include "math.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

ECG_DRAW::ECG_DRAW()
{

}

ECG_DRAW::~ECG_DRAW()
{

}

void ECG_DRAW::SetEcgDrawRect(CDC* pDC,CRect rDrawRect,int from,int to)
{
	//Before using this code you must specify
	//in your app the CRect&CClientDC
	//then pass them as parameters
	//in function SetEcgDrawrect
	///////////
/*	CRect rcClient;
	GetClientRect(rcClient);
	CClientDC dc(this);
*/	///////////
	//Set the rect for drawing
	m_rDrawRect = rDrawRect;
	//Get CDC pointer
	DC = pDC;
	i_from = from;
	i_to = to;
	Draw();
}

void ECG_DRAW::Draw()
{
	//test draw line
//	DC->MoveTo(0,0);
//	DC->LineTo(100,200);
	int DY = 100;
	//in to this class
	CBitmap Bitmap;
	CBitmap* pbmOld = NULL;//Pointer to the CBitmap object
	CDC dcMem;
	CRect BmpRect;
	BmpRect.SetRect(0,0,500,255);
	dcMem.CreateCompatibleDC(DC);//Greate painting object
	Bitmap.CreateCompatibleBitmap(DC,BmpRect.Width(),BmpRect.Height());
	//In to DCMem is getting the object bitmap
	pbmOld = dcMem.SelectObject(&Bitmap);
	//Creates the bitmap rectangle

	dcMem.PatBlt(0,0,500,255,WHITENESS);
	DrawGrid(&dcMem,BmpRect,1,RGB(190,220,190));
	DrawEcg(&dcMem,BmpRect,1);
	DrawQRS(&dcMem,1);
	DrawFromTo(&dcMem,1);
	DrawText(&dcMem,1);

	//Shows the bitmap on the dlg screen dY=100
	DC->BitBlt(m_rDrawRect.left,m_rDrawRect.top,m_rDrawRect.right,
		m_rDrawRect.bottom,&dcMem,0,0,SRCCOPY);

	dcMem.SelectObject(pbmOld);
	dcMem.DeleteDC();

}

void ECG_DRAW::SetArr(double *srcECG,double *srcQRS, int lenght)
{
	if(lenght>5000)
		lenght = 5000;
	//Copy the info from pointer*source to ECG array
	for(int i=0;i<lenght/2;i++)
	{
		ECG[i] = float(*(srcECG+i))/4;
		QRS[i] = float(*(srcQRS+i))/4;
	}

}

void ECG_DRAW::DrawGrid(CDC *pDC,CRect rRect,int d,COLORREF color)
{
	int dx=0;
	if(d==2)
		dx = 65;

	CPen lpenR(PS_SOLID,1,color);//Select color green
	CPen* pOldpen = pDC->SelectObject(&lpenR);
	pDC->SelectObject(&lpenR);

	pDC->Rectangle(rRect);
	//draw horizontal lines
	for(int i=0;i<255;i=i+63)
	{
		pDC->MoveTo(rRect.left*d+dx,i*d);
		pDC->LineTo(rRect.right*d+dx,i*d);
	}
	//draw vertical lines each one is equal to 1 sec
	for(i=0;i<550;i=i+50)
	{
		pDC->MoveTo(i*d+dx,rRect.top*d);
		pDC->LineTo(i*d+dx,rRect.bottom*d);
	}
	pDC->SelectObject(pOldpen);
}

void ECG_DRAW::DrawEcg(CDC *pDC, CRect rRect,int d)
{
	int dx=0;
	if(d==2)
		dx = 65;

	int i=0;
	int di=0;
	for(i=0;i<500;i++)
	{
		di = i*5;
		if(di<i_from)
		{
			pDC->MoveTo(i*d+dx,30*d - int(ECG[di])*d/2);
			pDC->LineTo(i*d+1+dx,30*d - int(ECG[di+5])*d/2);
		}
		if(di>i_from)
		{
			CPen lpenR(PS_SOLID,1,RGB(255,0,0));//Select color green
			CPen* pOldpen = pDC->SelectObject(&lpenR);
			pDC->SelectObject(&lpenR);
			pDC->MoveTo(i*d+dx,30*d - int(ECG[di])*d/2);
			pDC->LineTo(i*d+1+dx,30*d - int(ECG[di+5])*d/2);
			pDC->SelectObject(pOldpen);
		}
		if(di>i_to)
		{
	//		CPen lpenR(PS_SOLID,1,RGB(0,255,0));//Select color green
	//		CPen* pOldpen = pDC->SelectObject(&lpenR);
	//		pDC->SelectObject(&lpenR);
			pDC->MoveTo(i*d+dx,30*d - int(ECG[di])*d/2);
			pDC->LineTo(i*d+1+dx,30*d - int(ECG[di+5])*d/2);

	//		pDC->SelectObject(pOldpen);
		}		
	}		
}

void ECG_DRAW::DrawText(CDC *pDC,int d)
{
	CFont Font;
	Font.CreateFont(3,3,0,0,FW_DONTCARE,FALSE,FALSE,0,
		DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,
		CLIP_CHARACTER_PRECIS,DEFAULT_QUALITY,
		DEFAULT_PITCH|FF_DONTCARE,
		"MS Sans Serif");
	CFont* pOldFont = pDC->SelectObject(&Font);

	
	CString str;
	if(d==2)
		str = "      ";
	pDC->TextOut(2*d,200*d,str+"10s ECG record "+s_BmpInfo);

	for(int i=0;i<5;i++)
	{
		str.Format("%dmV",i);
		pDC->TextOut(460*d,255 - i*55,str);
	}
	//return the old font
	pDC->SelectObject(pOldFont);
}

void ECG_DRAW::DrawQRS(CDC *pDC,int d)
{
/*	int i=0;
	CPen lpenR(PS_SOLID,1,RGB(255,0,0));//Select color green
	CPen* pOldpen = pDC->SelectObject(&lpenR);
	pDC->SelectObject(&lpenR);

	pDC->MoveTo(0,127 - int(QRS[0]));
	double y_temp=0;
	for(i=0;i<500;i++)
	{
		for(int j=0;j<4;j++)
		{
			y_temp = y_temp + QRS[i*5+j];
		}
		y_temp = y_temp/4;
		pDC->LineTo(i+1,127 + int(y_temp));
	}
	pDC->SelectObject(pOldpen);
	*/
}

void ECG_DRAW::DrawFromTo(CDC *pDC,int d)
{
	int dx=0;
	if(d==2)
		dx = 65;

	if(i_to>2500)
		i_to=2500;
	int i=0;	
	for(i=i_from;i<i_to;i++)
	{
		pDC->MoveTo(i*d-i_from*d+dx,127*d - int(ECG[i])*d);
		pDC->LineTo(i*d+1-i_from*d+dx,127*d - int(ECG[i+1])*d);
	}
	//
	CPen lpenR(PS_SOLID,1,RGB(255,0,0));//Select color green
	CPen* pOldpen = pDC->SelectObject(&lpenR);
	pDC->SelectObject(&lpenR);
	for(i=i_from;i<i_to;i++)
	{
		pDC->MoveTo(i*d-i_from*d+dx,127*d - int(QRS[i])*d);
		pDC->LineTo(i*d+1-i_from*d+dx,127*d - int(QRS[i+1])*d);
	}
	pDC->SelectObject(pOldpen);
		CFont Font;
	Font.CreateFont(3,3,0,0,FW_DONTCARE,FALSE,FALSE,0,
		DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,
		CLIP_CHARACTER_PRECIS,DEFAULT_QUALITY,
		DEFAULT_PITCH|FF_DONTCARE,
		"MS Sans Serif");
	CFont* pOldFont = pDC->SelectObject(&Font);

	CString str;
	str.Format("segment of ECG record %ds, to %ds    (x=2000ms, y=4mV)",i_from/250,i_to/250);
	if(d==2)
		str = "      " + str;
	pDC->TextOut(1*d,232*d,str);
	pDC->SelectObject(pOldFont);
}

void ECG_DRAW::SaveBMP()
{
		
}

void ECG_DRAW::PrintBMP(CPerson* lpperson)
{
	//Problem with device pDC
	//Do not know how to enlarge the picture
	CPrintDialog dlgPrint(FALSE,PD_ALLPAGES,NULL);
	if(dlgPrint.DoModal()==IDOK)
	{
		CDC dcPrint;
		dcPrint.Attach(dlgPrint.GetPrinterDC());
		DOCINFO PrintJob;
		PrintJob.cbSize = sizeof(PrintJob);
		PrintJob.lpszDocName = "BMP printing";
		PrintJob.lpszOutput = NULL;
		PrintJob.lpszDatatype = NULL;
		PrintJob.fwType = NULL;

		if(dcPrint.StartDoc(&PrintJob)>=0)
		{
			int k=2;
			CRect BmpRect;
			//enlarge width from 500->1000
			BmpRect.SetRect(0,0,500,255);
			dcPrint.StartPage();
			//Draw ECG information
			DrawGrid(&dcPrint,BmpRect,k,RGB(140,140,140));
			DrawEcg(&dcPrint,BmpRect,k);
			DrawQRS(&dcPrint,k);
			DrawFromTo(&dcPrint,k);
			DrawText(&dcPrint,k);
			//print the person information
			DrawPersonalInfo(&dcPrint,65,510,lpperson);
			//print this ecg info
	
			dcPrint.EndPage();
			dcPrint.EndDoc();
		}
		
		dcPrint.DeleteDC();
	}

}

void ECG_DRAW::SetEcgInfo(CString info)
{
	s_BmpInfo = "";
	s_BmpInfo = s_BmpInfo + info;
}

int ECG_DRAW::DrawPersonalInfo(CDC *pDC, int x, int y,CPerson* lpperson)
{
	//Print current time
	COleDateTime curtime;
	curtime = COleDateTime::GetCurrentTime();
	y = y+30;
	pDC->TextOut(x,y,"   Printed date: "+
				curtime.Format("%dd.%mm.%Yy - %Xh"));
	//print the person information
	//Print EGN 
	y = y+60;
	pDC->TextOut(x,y,"                 Personal Info");
	y = y+35;
	pDC->TextOut(x,y,"            EGN: "+lpperson->sEGN);
	//Print birthdate
	y = y+30;
	//Format age etring
	CString sage;
	sage.Format(" - %dy.",curtime.GetYear()-lpperson->Birth_Date.GetYear());
	pDC->TextOut(x,y,"      birthdate: "+lpperson->Birth_Date.Format("%dd.%mm.%Yy")+
		sage);
	//Print name
	y =y+30;
	pDC->TextOut(x,y,"           name: "+lpperson->sName_1+" "+
		lpperson->sName_2+" "+lpperson->sName_3);
	//Print sex
	y = y+30;
	pDC->TextOut(x,y,"            sex: "+lpperson->Sex);
	//Print address
	y = y+30;
	pDC->TextOut(x,y,"        address: "+lpperson->sAddress);
	//Print phone
	y = y+30;
	pDC->TextOut(x,y,"          phone: "+lpperson->sPhone);
	return y;
}

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About the Author

Georgi Petrov
Instructor / Trainer
Bulgaria Bulgaria
PhD, Cum Laude in digital automation systems
M.S. in Telemommunication management
B.S. in Telecommunication systems engineering
Programming: CUDA, C/C++, VHDL
Software and Hardware development and consulting:
data acquisition, image processing, medical instrumentation

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Article Copyright 2003 by Georgi Petrov
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