Micro-Vision V411 acquisition card obtains image OpenCV in X64 environment

A few days ago bought a micro-vision V411 acquisition card, initially want to use OPENCV to directly collect video stream, using the teacher's multi-camera acquisition program. Unfortunately, no image is collected, simply use the SDK provided by micro-vision to develop.

SDK Scenario One: Mv_capturesingle

	Dcardnum = Mv_getdevicenumber ()
	HWND Hwnd=getsafehwnd ();

	DWORD i;
        for (i=0;i<dcardnum;i++)
	{
		Hdvchdl[i]=mv_opendevice (i, TRUE);
		Mv_setdeviceparameter (Hdvchdl[i], disp_whnd, (DWORD) HWND);	Sets the image display window handle
		mv_setdeviceparameter (hdvchdl[i],garb_bitdescribe,data_co_rgb24);  Set to 24-bit acquisition

		Mv_setdeviceparameter (Hdvchdl[i], disp_left, i%2*460);
		Mv_setdeviceparameter (Hdvchdl[i], disp_top, (I/2) *345);

		Mv_setdeviceparameter (Hdvchdl[i], garb_in_width, 768);
		Mv_setdeviceparameter (Hdvchdl[i], garb_width, 768);
		Mv_setdeviceparameter (Hdvchdl[i], disp_width, 460);

		Mv_setdeviceparameter (Hdvchdl[i], garb_in_height, 288);
		Mv_setdeviceparameter (Hdvchdl[i], garb_height, 288);
		Mv_setdeviceparameter (Hdvchdl[i], disp_height, 345);

		Mv_operatedevice (Hdvchdl[i], mvrun);
	}

This line is important to set the 24-bit acquisition of the line, it specifies the data collected card transmission, here I set the

    Data_co_rgb24

Followed by our protagonist: OpenCV

		For (DWORD i=0;i<num;i++)	//num
		{
			mv_setdeviceparameter (hdvchdl[i], Set_garbimageinfo, (DWORD) & Info[i]);	Get information about the current image

			PVOID PBuf = malloc (Info[i]. Length);
			Capture an image
			ptr[i] = Mv_capturesingle (Hdvchdl[i], FALSE, Pbuf,info[i]. Length, &info[i]);
			sprintf (char *) &filename, "card%d_%d", i+1, FileNum);
			if (i = = 0)
			{
				Cv::mat frame (info[i]. Heigth,info[i]. WIDTH,CV_8UC3);
				Frame.data = static_cast<uchar*> (Ptr[i]);
				Cv::resize (Frame,frame,cv::size (320,240));
				Cv::imshow ("Mat0", frame);
				if (cv::waitkey () = =) break;
				Cv::imwrite ("1.jpg", frame);
			}

<span style= "font-family:arial, Helvetica, Sans-serif;" >						</span><span style= "font-family:arial, Helvetica, Sans-serif;" >free (PBUF);</span>

<span style= "White-space:pre" >		</span>   }
			

The important thing is this line:

Cv::mat frame (Info[i]. Heigth,info[i]. WIDTH,CV_8UC3);

This method is easy to implement, but the acquisition rate is too slow, which affects post-processing.

SDK Scenario Two: Mv_setcallback

The important thing is two lines, the other is consistent with the method, remember to comment out the image display code (GARB_).

		Mv_setdeviceparameter (Hdvchdl[i], grab_bitdescribe, data_co_rgb24);
		Mv_setcallback (Hdvchdl[i], func[i], this, before_process)

BOOL WINAPI CALLBACKFUNCT1 (PVOID pData, Pmv_imageinfo pimageinfo, PVOID puserdata, ULONG Index);

BOOL WINAPI CALLBACKFUNCT1 (PVOID pData, Pmv_imageinfo pimageinfo, PVOID puserdata, ULONG Index)
{    
	if (((CMUTIFAC erecdlg*) (puserdata)->bdvccpt)
	{
	   if (((cmutifacerecdlg*) puserdata)->bdvc1cpt)
	   {
		   memcpy (( cmutifacerecdlg*) puserdata)->pdata1,pdata,768*576*4);
		((cmutifacerecdlg*) puserdata)->bdvc1cpt=false;
	   }
	}

	return TRUE;

｝

OpenCV Capture and display

        Iplimage M_frame;
	Cvvimage M_cvvimage; 
	Mv_imageinfo info;

	BDVCCPT  = TRUE;
	BDVC1CPT = TRUE;

	Mv_setdeviceparameter (Hdvchdl[0],set_garbimageinfo, (DWORD) &info);	
	Cv::mat FRAME (info. Heigth,info. WIDTH,CV_8UC3);
	Frame.data = static_cast<uchar*> (pData1);
	
	M_frame = Frame;
	M_cvvimage.copyof (&m_frame,1);				Copy the frame image    
        M_cvvimage.drawtohdc (HDC, &rect);			Display to the device in a rectangular box

If you want to do the video stream display, this line of code must not forget, the reason to look at the callback function.

	BDVCCPT  = TRUE;
	BDVC1CPT = TRUE;

The acquisition rate of the two methods is close to the sampling frame rate of the camera, the code is written in a chaotic way, for reference only. Most of the code refers to the SDK and demo provided by the micro-view.

This article is for reference only, if reproduced please indicate the source.