cv::VideoCapture vc;

	vc.open(0);

	cv::Mat temp;

	vc.read(temp);

	//cv::resize(temp,temp,cv::Size(320,240));

	vector<uchar> buff;

	cv::imencode(".bmp" ,temp ,buff);

	vc.release();

	uchar* dest=new uchar[buff.size()*2];

	uchar* bb=(uchar*)&buff[0];

	int len=buff.size();

	Base64Encode(dest,bb,len);

	CString b64=(char*)dest;

	CString szText="data:image/bmp;base64,"+b64;

	HRESULT hr = NULL;

	IHTMLElement* psrcElement;

	VARIANT value;

	hr = GetElement("bg", &psrcElement );

	if( SUCCEEDED( hr ))

	{

		value.bstrVal=szText.AllocSysString();//(BSTR)L"file:///c:/f.jpg";

		value.vt=VT_BSTR;

		hr = psrcElement->setAttribute( L"src",value );

	}

	delete[ ] dest;

static const char g_sas8Base64digits[] =

	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

//编码

void Base64Encode(uchar *ps8Dest, const uchar *ps8Source, int s32InLen)

{

	if (ps8Dest==NULL || ps8Source==NULL || s32InLen<=0)

	{

		return;

	}

	for (; s32InLen >= 3; s32InLen -= 3)

	{

		*ps8Dest++ = g_sas8Base64digits[ps8Source[0] >> 2];

		*ps8Dest++ = g_sas8Base64digits[((ps8Source[0] << 4) & 0x30) | (ps8Source[1] >> 4)];

		*ps8Dest++ = g_sas8Base64digits[((ps8Source[1] << 2) & 0x3c) | (ps8Source[2] >> 6)];

		*ps8Dest++ = g_sas8Base64digits[ps8Source[2] & 0x3f];

		ps8Source += 3;

	}

	if (s32InLen > 0)

	{

		unsigned char fragment;

		*ps8Dest++ = g_sas8Base64digits[ps8Source[0] >> 2];

		fragment = (ps8Source[0] << 4) & 0x30;

		if (s32InLen > 1)

			fragment |= ps8Source[1] >> 4;

		*ps8Dest++ = g_sas8Base64digits[fragment];

		*ps8Dest++ = (s32InLen < 2) ? '=' : g_sas8Base64digits[(ps8Source[1] << 2) & 0x3c];

		*ps8Dest++ = '=';

	}

	*ps8Dest = '\0';

}