OpenCV的Mat与ATL/MFC的CImage相互转换

头文件

class 你的类名
{
public:	
	/*MatToCImage
	*简介：
	*	OpenCV的Mat转ATL/MFC的CImage，仅支持单通道灰度或三通道彩色
	*参数：
	*	mat：OpenCV的Mat
	*	cimage：ATL/MFC的CImage
	*/
	void MatToCImage(Mat& mat, CImage& cimage);


	/*CImageToMat
	*简介：
	*	ATL/MFC的CImage转OpenCV的Mat，仅支持单通道灰度或三通道彩色
	*参数：
	*	cimage：ATL/MFC的CImage
	*	mat：OpenCV的Mat
	*/
	void CImageToMat(CImage& cimage, Mat& mat);
};

实现文件

void 你的类名::MatToCImage(Mat& mat, CImage& cimage)
{
	if (0 == mat.total())
	{
		return;
	}


	int nChannels = mat.channels();
	if ((1 != nChannels) && (3 != nChannels))
	{
		return;
	}
	int nWidth    = mat.cols;
	int nHeight   = mat.rows;


	//重建cimage
	cimage.Destroy();
	cimage.Create(nWidth, nHeight, 8 * nChannels);


	//拷贝数据


	uchar* pucRow;									//指向数据区的行指针
	uchar* pucImage = (uchar*)cimage.GetBits();		//指向数据区的指针
	int nStep = cimage.GetPitch();					//每行的字节数,注意这个返回值有正有负


	if (1 == nChannels)								//对于单通道的图像需要初始化调色板
	{
		RGBQUAD* rgbquadColorTable;
		int nMaxColors = 256;
		rgbquadColorTable = new RGBQUAD[nMaxColors];
		cimage.GetColorTable(0, nMaxColors, rgbquadColorTable);
		for (int nColor = 0; nColor < nMaxColors; nColor++)
		{
			rgbquadColorTable[nColor].rgbBlue = (uchar)nColor;
			rgbquadColorTable[nColor].rgbGreen = (uchar)nColor;
			rgbquadColorTable[nColor].rgbRed = (uchar)nColor;
		}
		cimage.SetColorTable(0, nMaxColors, rgbquadColorTable);
		delete []rgbquadColorTable;
	}


	for (int nRow = 0; nRow < nHeight; nRow++)
	{
		pucRow = (mat.ptr(nRow));
		for (int nCol = 0; nCol < nWidth; nCol++)
		{
			if (1 == nChannels)
			{
				*(pucImage + nRow * nStep + nCol) = pucRow[nCol];
			}
			else if (3 == nChannels)
			{
				for (int nCha = 0 ; nCha < 3; nCha++)
				{
					*(pucImage + nRow * nStep + nCol * 3 + nCha) = pucRow[nCol * 3 + nCha];
				}			
			}
		}	
	}
}

void 你的类名::CImageToMat(CImage& cimage, Mat& mat)
{
	if (true == cimage.IsNull())
	{
		return;
	}


	int nChannels = cimage.GetBPP() / 8;
	if ((1 != nChannels) && (3 != nChannels))
	{
		return;
	}
	int nWidth    = cimage.GetWidth();
	int nHeight   = cimage.GetHeight();


	//重建mat
	if (1 == nChannels)
	{
		mat.create(nHeight, nWidth, CV_8UC1);
	}
	else if(3 == nChannels)
	{
		mat.create(nHeight, nWidth, CV_8UC3);
	}


	//拷贝数据


	uchar* pucRow;									//指向数据区的行指针
	uchar* pucImage = (uchar*)cimage.GetBits();		//指向数据区的指针
	int nStep = cimage.GetPitch();					//每行的字节数,注意这个返回值有正有负


	for (int nRow = 0; nRow < nHeight; nRow++)
	{
		pucRow = (mat.ptr(nRow));
		for (int nCol = 0; nCol < nWidth; nCol++)
		{
			if (1 == nChannels)
			{
				pucRow[nCol] = *(pucImage + nRow * nStep + nCol);
			}
			else if (3 == nChannels)
			{
				for (int nCha = 0 ; nCha < 3; nCha++)
				{
					pucRow[nCol * 3 + nCha] = *(pucImage + nRow * nStep + nCol * 3 + nCha);
				}			
			}
		}	
	}
}