Saran's profile - activity

Hi, I'm Using Opencv 2.4.9 version and want to customize OpenCV, to send a buffer of size 4kb. Can I know how to implement a new functionality in OpenCV like(open,set,get,release,grab,etc..). When i try to add new function during building i got the following error "Error 1 error LNK2019: unresolved external symbol "public: virtual bool __thiscall cv::VideoCapture::programFGPA(int,unsigned char *)" (?programFGPA@VideoCapture@cv@@UAE_NHPAE@Z) referenced in function _main Error 2 error LNK1120: 1 unresolved externals

Any suggestion will be much helpful...

Are you using EmguCV? .debug the code step by step,you can find the issue...

I have tried with similar model (3 PC's) as of mine, it's working fine. but not working in other models.

Note : the 3 PC's which worked fine have visual studio installed in it, the other models not working doesn't have visual studio installed in it.

Thanks for your reply, while installing the dll's are created in the installation folder..

Hi all, I have customized opencv 2.4.9 to support extension unit in it. I used the opencv dll's to generate new EmguCV dll's for my project. After generating the exe , its working fine in my PC , i can able to access the extension unit. But the exe is not working on other PC's of same configuration. When i open the device "EMGU.CV.CVInvoke " threw an exception --->system.BadImageFormatException: An attempt was made to load a program with an incorrect format.(Exception from HRESULT: 0x8007007B).

Note : I tired the exe in my PC by uninstalling OpenCV and EmguCV , still it is running in my PC.

Hi, I tried with Cypress development board, after flashing the firmware it will enumerate as a video device. It doesn't has an FPGA, The GPIF is left opened, as it is opened it will send "FF" data , In the host side i tried wit 640 x 480, but it's timeout error. when i tried with 100 x 80, I can able to view Raw data and when i plot the data i got white image of 100 x 80 resolution.

Hi, I am streaming from a customized camera device using Opencv c++, I got timeout error when grabbing a frame. Actual Camera setup is like FPGA -> Cypress controller -> host. Currently no Sensor is connected. The FPGA is programmed like that, it will work for 640 x 480 resolution raw data(YUY2). I can able to view the packets received at the host side with the help of Device Monitoring Studio. But in OpenCv It is throwing timeout error. Can anyone help me to resolve this issue.

My code for capturing

int main()
{
    VideoCapture cap;
    char keypressed;

    cap.open(0);

   if (!cap.isOpened())
    {
        cout << "***Could not initialize capturing...***\n";
        return -1;
    }

    for (;;)
    {

        cap.read(InputFrame);
        if (InputFrame.empty()){
            cout << "\n***Frame Empty error***";
        }
        else
        {

            //resizeWindow(" Output Window ", 640, 480);
            imshow(" Output Window ", InputFrame);
        }


        keypressed = (char)waitKey(1);

        //Break when user presses ESC key
        if (keypressed == 27)
            break;

    }

If you need more clarification please feel free to ask.

I have tried with libusbdotnet but packets are missing , can you suggest any other tool

Hi all,

I want OpenCV to capture raw data from the camera device. Can any one guide me in this. The camera device will be sending some data like "FF" for 16KB, I want to get it without being Processed by the OpenCV.

Hi all, I have a trouble with Open CV in Capturing YUY2 Format from a HD 720p Webcam. The Webcam can Support Both MJPG and YUY2 Format. I want to grab only the YUY2 Format from the Webcam. I'm Using Emgu CV v3.0.0.2157 (cross platform .Net wrapper to the OpenCV image processing ). The function I used to grab the frame from the camera is

                                                      "  frame = capture.QueryFrame(); " ,  where frame is  (Mat frame;).

Is there any way to grab YUY2 format from the camera, whether " QueryFrame() " can grab YUY2 Format.

I have also set the Camera Format to YUY2 before Capturing , mentioned below "capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FourCC, 0x32595559);" , where 0x32595559 is the Fourcc for YUY2, but no use it sill can able to capture MJPG Format.. Pls help me..Thank you