chist.cpp

数字图像处理的灰度处理源代码.rar

// chist.cpp : implementation file
//

#include "stdafx.h"
#include "shiyu.h"
#include "chist.h"
#include "DIBAPI.h"

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

/////////////////////////////////////////////////////////////////////////////
// chist dialog


chist::chist(CWnd* pParent /*=NULL*/)
	: CDialog(chist::IDD, pParent)
{
	//{{AFX_DATA_INIT(chist)
	m_HueMax = 0;
	m_HueMin = 0;
	//}}AFX_DATA_INIT
}


void chist::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(chist)
	DDX_Text(pDX, IDC_EDIT_max, m_HueMax);
	DDX_Text(pDX, IDC_EDIT_min, m_HueMin);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(chist, CDialog)
	//{{AFX_MSG_MAP(chist)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// chist message handlers

BOOL chist::OnInitDialog() 
{
	CDialog::OnInitDialog();
	unsigned char* lpSrc;
	LONG i;
	LONG j;
	
	// TODO: Add extra initialization here
	CWnd* pWnd=GetDlgItem(IDC_HISTSHOW);


	CRect rect;
	GetClientRect(rect);
	ClientToScreen(&rect);

	for(i=0;i<256;i++)
	{
		m_lCount[i]=0;
	}

	LONG lLineBytes;

	lLineBytes=WIDTHBYTES(m_lWidth*8);

	for(i=0;i<m_lHeight;i++)
	{
		for(j=0;j<m_lWidth;j++)
		{
			lpSrc=(unsigned char*)m_lpDIBBits+lLineBytes*i+j;

			m_lCount[*(lpSrc)]++;
		}
	}

	m_iIsDraging=0;


	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void chist::OnPaint() 
{
	CString str;
	LONG i;
	LONG lMaxCount=0;
	LONG m_iLowGray=0;
	LONG m_iUpGray=255;
	

	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	CWnd* pWnd=GetDlgItem(IDC_HISTSHOW);

	CDC* pDC=pWnd->GetDC();
	pWnd->Invalidate();
	pWnd->UpdateWindow();

	pDC->Rectangle(0,0,320,300);

	CPen* pPenRed=new CPen;

	pPenRed->CreatePen(PS_DASH,1,RGB(255,0,0));

    CPen* pPenBlack=new CPen;

	pPenBlack->CreatePen(PS_SOLID,1,RGB(0,0,0));

	CPen* pPenGreen=new CPen;

	pPenGreen->CreatePen(PS_SOLID,1,RGB(0,255,0));

	CPen* pPenBlue=new CPen;

	pPenBlue->CreatePen(PS_SOLID,1,RGB(0,0,255));

	CGdiObject* pOldPen=pDC->SelectObject(pPenBlue);

	pDC->MoveTo(10,10);

	pDC->LineTo(10,280);

	pDC->LineTo(320,280);

	str.Format("0");
	pDC->TextOut(10,283,str);
	str.Format("50");
	pDC->TextOut(60,283,str);
	str.Format("100");
	pDC->TextOut(110,283,str);
	str.Format("150");
	pDC->TextOut(160,283,str);
	str.Format("200");
	pDC->TextOut(210,283,str);
	str.Format("255");
	pDC->TextOut(265,283,str);

	for(i=0;i<256;i+=5)
	{
		if((i&1)==0)
		{
			pDC->MoveTo(i+10,280);
			pDC->LineTo(i+10,284);
		}
		else
		{
			pDC->MoveTo(i+10,280);
			pDC->LineTo(i+10,282);
		}
	}

    pDC->MoveTo(315,275);
	pDC->LineTo(320,280);
	pDC->LineTo(315,285);

	pDC->MoveTo(10,10);
	pDC->LineTo(5,15);
	pDC->MoveTo(10,10);
	pDC->LineTo(15,15);

	for(i=m_iLowGray;i<=m_iUpGray;i++)
	{
		if(m_lCount[i]>lMaxCount)
		{
			lMaxCount=m_lCount[i];
		}
	}

	pDC->MoveTo(10,25);
	pDC->LineTo(14,25);
	str.Format("%d",lMaxCount);
	pDC->TextOut(11,26,str);

	pDC->SelectObject(pPenRed);

	pDC->MoveTo(m_iLowGray+10,25);
	pDC->LineTo(m_iLowGray+10,280);

	pDC->MoveTo(m_iUpGray+10,25);
	pDC->LineTo(m_iUpGray+10,280);

	pDC->SelectObject(pPenBlack);

	if(lMaxCount>0)
	{
		for(i=m_iLowGray;i<=m_iUpGray;i++)
		{
			pDC->MoveTo(i+10,280);
			pDC->LineTo(i+10,281-(int)(m_lCount[i]*256/lMaxCount));
		}
	}

	pDC->SelectObject(pOldPen);


	delete pPenRed;
	delete pPenBlack;
	delete pPenGreen;

	
	// Do not call CDialog::OnPaint() for painting messages
}