?? areapro.cpp

?? VC++實際編程的源代碼多種圖像邊緣檢測與分割處理
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	int nWidthBytes, nNumColors, x, y;

	//是否找到起始點及回到起始點
	bool bFindStartPoint;

	//是否掃描到一個邊界點
	bool bFindPoint;

	//起始邊界點與當前邊界點
	CPoint StartPoint,CurrentPoint;

	//八個方向和起始掃描方向
	int Direction[8][2]={
							{-1, 1},
							{ 0, 1},
							{ 1, 1},
							{ 1, 0},
							{ 1,-1},
							{ 0,-1},
							{-1,-1},
							{-1, 0}
						};
	int BeginDirect;

	//原圖像指針
	pOldBuffer = (unsigned char *) m_pDibObject->GetDIBPointer(&nWidthBytes, 
																m_pDibObject->GetNumBits() );
	if( pOldBuffer == NULL ) return( FALSE );

	//原圖像文件頭指針
	pOldBFH = (BITMAPFILEHEADER *) pOldBuffer;
	//原圖像信息頭指針
	pOldBIH = (BITMAPINFOHEADER *) &pOldBuffer[sizeof(BITMAPFILEHEADER)];
	//原圖像顏色數
	nNumColors = m_pDibObject->GetNumColors();
	//原圖像調色板指針
	pOldPalette = (RGBQUAD *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)];
	//原圖像數據指針
	pOldBits = (unsigned char *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)
											+nNumColors*sizeof(RGBQUAD)];

	//為新圖像數據區分配內存
	DWORD dwNewSize;
	HGLOBAL hNewDibBits;
	//新圖像數據區大小
	dwNewSize = nWidthBytes * nHeight;
	//為新圖像分配內存
	hNewDibBits = ::GlobalAlloc( GMEM_MOVEABLE | GMEM_ZEROINIT, dwNewSize );
	if( hNewDibBits == NULL )
	{
		m_pDibObject->m_nLastError = IMAGELIB_MEMORY_ALLOCATION_ERROR;
		::GlobalUnlock( m_pDibObject->GetDib() );
		return( FALSE );
	}

	//新圖像指針
	pNewBits = (unsigned char *) ::GlobalLock( hNewDibBits );
	if( pNewBits == NULL )
	{
		::GlobalFree( hNewDibBits );
		m_pDibObject->m_nLastError = IMAGELIB_MEMORY_LOCK_ERROR;
		::GlobalUnlock( m_pDibObject->GetDib() );
		return( FALSE );
	}

	//用255（白色）填充新圖像數據區
	memset(pNewBits, (BYTE)255, nWidthBytes * nHeight );
	//用原圖像數據填充新圖像數據區
	//memcpy( pNewBits, pOldBits, nWidthBytes * nHeight );

	//查找最左下方的邊界點
	bFindStartPoint = false;

	for (y = 0; y < nHeight && !bFindStartPoint; y++)
	{
		pOldTemp = pOldBits;
		pOldTemp +=  y * nWidthBytes;
		pNewTemp = pNewBits;
		pNewTemp +=  y * nWidthBytes;
		for(x = 0; x < nWidth && !bFindStartPoint; x++)
		{
			//找到最左上方的邊界點
			if(pOldTemp[x] == 0)
			{
				bFindStartPoint = true;
				StartPoint.y = y;
				StartPoint.x = x;
				//新圖像數據區相應位置賦0（黑色）			
				pNewTemp[x] = (unsigned char)0;
			}		
		}
	}

	//由于起始點是在左下方，故起始掃描沿左上方向
	BeginDirect = 0;

	//是否跟蹤到起始點
	bFindStartPoint = false;

	//從初始點開始掃描
	CurrentPoint = StartPoint;

	//邊界跟蹤
	while(!bFindStartPoint)
	{
		bFindPoint = false;
		while(!bFindPoint)
		{
			//沿掃描方向查看一個像素
			pOldTemp = pOldBits + nWidthBytes * 
				( CurrentPoint.y + Direction[BeginDirect][1])
				+ (CurrentPoint.x + Direction[BeginDirect][0]);
			if(*pOldTemp == 0)
			{
				bFindPoint = true;
				CurrentPoint.y = CurrentPoint.y + 
								Direction[BeginDirect][1];
				CurrentPoint.x = CurrentPoint.x + 
								Direction[BeginDirect][0];
				if(CurrentPoint == StartPoint)
				{
					bFindStartPoint = true;
				}
				pNewTemp = pNewBits + nWidthBytes * 
									CurrentPoint.y + 
									CurrentPoint.x;
				*pNewTemp = (unsigned char)0;

				//掃描的方向逆時針旋轉兩格
				BeginDirect--;
				if(BeginDirect == -1)
					BeginDirect = 7;
				BeginDirect--;
				if(BeginDirect == -1)
					BeginDirect = 7;
			}
			else
			{
				//掃描方向順時針旋轉一格
				BeginDirect++;
				if(BeginDirect == 8)
					BeginDirect = 0;

			}

		}
	}

	//用新圖像數據填充原圖像數據區
	memcpy( pOldBits, pNewBits, nWidthBytes * nHeight );

	::GlobalFree( hNewDibBits );
	::GlobalUnlock( m_pDibObject->GetDib() );

	return(TRUE);
}

////////////////////////////////////////////////////////////////////////
//BOOL ContourPickUp()   
//----------------------------------------------------------------------
//基本功能：本函數對傳入的CDibObject圖像對象進行輪廓提取。
//----------------------------------------------------------------------
//參數說明：CDibObject *pDibObject	圖像對象指針
//----------------------------------------------------------------------
//返    回：BOOL
//			成功時返回TRUE，失敗時返回FALSE。
//----------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////
BOOL CAreaPro::ContourPickUp(CDibObject *pDibObject)
{
   //圖像指針為空，無法操作返回
	if(m_pDibObject == NULL) return(FALSE);
	
	//只支持8位圖像
	if(m_pDibObject->GetNumBits() != 8)
	{
		// 提示用戶參數設置錯誤
		AfxMessageBox("只支持8位圖像,請重新載入！");
		
		// 返回
		return( FALSE );
	}
	
	//獲取圖像寬度和高度（以像素為單位）
	int nWidth = m_pDibObject->GetWidth();
	int nHeight = m_pDibObject->GetHeight();
	
	//定義變量
	unsigned char *pOldBuffer; 
	unsigned char *pOldBits, *pNewBits;
	unsigned char *pOldTemp, *pNewTemp;
	BITMAPFILEHEADER *pOldBFH;
	BITMAPINFOHEADER *pOldBIH;
	RGBQUAD *pOldPalette;
	int nWidthBytes, nNumColors, x, y;

	//八個方向
	unsigned char n,e,s,w,ne,se,nw,sw;

	//臨時存放像素值
	unsigned char pixel;

	//原圖像指針
	pOldBuffer = (unsigned char *) m_pDibObject->GetDIBPointer(&nWidthBytes, 
																m_pDibObject->GetNumBits() );
	if( pOldBuffer == NULL ) return( FALSE );

	//原圖像文件頭指針
	pOldBFH = (BITMAPFILEHEADER *) pOldBuffer;
	//原圖像信息頭指針
	pOldBIH = (BITMAPINFOHEADER *) &pOldBuffer[sizeof(BITMAPFILEHEADER)];
	//原圖像顏色數
	nNumColors = m_pDibObject->GetNumColors();
	//原圖像調色板指針
	pOldPalette = (RGBQUAD *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)];
	//原圖像數據指針
	pOldBits = (unsigned char *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)
											+nNumColors*sizeof(RGBQUAD)];

	//為新圖像數據區分配內存
	DWORD dwNewSize;
	HGLOBAL hNewDibBits;
	//新圖像數據區大小
	dwNewSize = nWidthBytes * nHeight;
	//為新圖像分配內存
	hNewDibBits = ::GlobalAlloc( GMEM_MOVEABLE | GMEM_ZEROINIT, dwNewSize );
	if( hNewDibBits == NULL )
	{
		m_pDibObject->m_nLastError = IMAGELIB_MEMORY_ALLOCATION_ERROR;
		::GlobalUnlock( m_pDibObject->GetDib() );
		return( FALSE );
	}

	//新圖像指針
	pNewBits = (unsigned char *) ::GlobalLock( hNewDibBits );
	if( pNewBits == NULL )
	{
		::GlobalFree( hNewDibBits );
		m_pDibObject->m_nLastError = IMAGELIB_MEMORY_LOCK_ERROR;
		::GlobalUnlock( m_pDibObject->GetDib() );
		return( FALSE );
	}

	//用255（白色）填充新圖像數據區
	memset(pNewBits, (BYTE)255, nWidthBytes * nHeight );

	for(y = 1; y < nHeight - 1; y++)
	{
		//指向源圖像倒數第y行
		pOldTemp = pOldBits;
		pOldTemp +=  y * nWidthBytes;
		//指向目標圖像倒數第y行			
		pNewTemp = pNewBits;
		pNewTemp +=  y * nWidthBytes;
		for(x = 1; x < nWidth - 1; x++)
		{
			//取得當前指針處的像素值
			pixel = *pOldTemp;

			if(pixel == 0)
			{
				*pNewTemp = 0;
				nw = *(pOldTemp + nWidthBytes - 1);
				n  = *(pOldTemp + nWidthBytes);
				ne = *(pOldTemp + nWidthBytes + 1);
				w = *(pOldTemp - 1);
				e = *(pOldTemp + 1);
				sw = *(pOldTemp - nWidthBytes - 1);
				s  = *(pOldTemp - nWidthBytes );
				se = *(pOldTemp - nWidthBytes + 1);
				//如果相鄰的八個點都是黑點
				if(nw + n + ne + w + e + sw + s + se == 0)
				{
					*pNewTemp = 255;
				}
			}
			pOldTemp++;			
			pNewTemp++;
		}
	}

	//用新圖像數據填充原圖像數據區
	memcpy( pOldBits, pNewBits, nWidthBytes * nHeight );

	::GlobalFree( hNewDibBits );
	::GlobalUnlock( m_pDibObject->GetDib() );

	return(TRUE);
}

////////////////////////////////////////////////////////////////////////
//BOOL Feeding1()   
//----------------------------------------------------------------------
//基本功能：本函數對傳入的CDibObject圖像對象進行種子填充。
//----------------------------------------------------------------------
//參數說明：CDibObject *pDibObject	圖像對象指針
//----------------------------------------------------------------------
//返    回：BOOL
//			成功時返回TRUE，失敗時返回FALSE。
//----------------------------------------------------------------------
////////////////////////////////////////////////////////////////////////
BOOL CAreaPro::Feeding1(CDibObject *pDibObject)
{
   //圖像指針為空，無法操作返回
	if(m_pDibObject == NULL) return(FALSE);
	
	//只支持8位圖像
	if(m_pDibObject->GetNumBits() != 8)
	{
		// 提示用戶參數設置錯誤
		AfxMessageBox("只支持8位圖像,請重新載入！");
		
		// 返回
		return( FALSE );
	}
	
	//獲取圖像寬度和高度（以像素為單位）
	int nWidth = m_pDibObject->GetWidth();
	int nHeight = m_pDibObject->GetHeight();
	
	//定義變量
	unsigned char *pOldBuffer; 
	unsigned char *pOldBits;
	unsigned char *pOldTemp;
	BITMAPFILEHEADER *pOldBFH;
	BITMAPINFOHEADER *pOldBIH;
	RGBQUAD *pOldPalette;
	int nWidthBytes, nNumColors;

	//種子堆棧及指針
	Seed *Seeds;
	int StackPoint;

	//當前像素位置
	int iCurrentPixelx,iCurrentPixely;

	//臨時存放像素值
	unsigned char pixel;

	//原圖像指針
	pOldBuffer = (unsigned char *) m_pDibObject->GetDIBPointer(&nWidthBytes, 
																m_pDibObject->GetNumBits() );
	if( pOldBuffer == NULL ) return( FALSE );

	//原圖像文件頭指針
	pOldBFH = (BITMAPFILEHEADER *) pOldBuffer;
	//原圖像信息頭指針
	pOldBIH = (BITMAPINFOHEADER *) &pOldBuffer[sizeof(BITMAPFILEHEADER)];
	//原圖像顏色數
	nNumColors = m_pDibObject->GetNumColors();
	//原圖像調色板指針
	pOldPalette = (RGBQUAD *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)];
	//原圖像數據指針
	pOldBits = (unsigned char *) &pOldBuffer[sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)
											+nNumColors*sizeof(RGBQUAD)];

	//初始化種子
	Seeds = new Seed[nWidthBytes * nHeight];
	Seeds[1].Height = nHeight / 2;
	Seeds[1].Width = nWidthBytes / 2;
	StackPoint = 1;

	while( StackPoint != 0)
	{
		//取出種子
		iCurrentPixelx = Seeds[StackPoint].Width;
		iCurrentPixely = Seeds[StackPoint].Height;
		StackPoint--;

		pOldTemp = pOldBits + nWidthBytes * iCurrentPixely + iCurrentPixelx;
		//取得當前指針處的像素值
		pixel = *pOldTemp;

		//將當前點涂黑
		*pOldTemp = 0;

		//判斷左面的點，如果為白，則壓入堆棧
		//注意防止越界
		if(iCurrentPixelx > 0)
		{
			pOldTemp = pOldBits + nWidthBytes * iCurrentPixely + iCurrentPixelx - 1;
			//取得當前指針處的像素值
			pixel = *pOldTemp;
			if (pixel == 255)
			{
				StackPoint++;
				Seeds[StackPoint].Height = iCurrentPixely;
				Seeds[StackPoint].Width = iCurrentPixelx - 1;
			}
		}

		//判斷上面的點，如果為白，則壓入堆棧
		//注意防止越界
		if(iCurrentPixely < nHeight - 1)
		{
			pOldTemp = pOldBits + nWidthBytes * (iCurrentPixely + 1) + iCurrentPixelx;
			//取得當前指針處的像素值
			pixel = *pOldTemp;
			if (pixel == 255)
			{
				StackPoint++;
				Seeds[StackPoint].Height = iCurrentPixely + 1;
				Seeds[StackPoint].Width = iCurrentPixelx;
			}
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