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Thread: setFPS without Imaging source library (using Qt Creator + OpenCV), How can I do?

  1. #1
    Join Date
    Apr 2011

    setFPS without Imaging source library (using Qt Creator + OpenCV), How can I do?


    I'm working on a C++ project in which I have to grab a frame from the camera and implement it into a GUI.

    I'm using OpenCV for grabing frames and Qt Creator is my IDE, wich allows me to create a GUI easily. But I have some problems.

    The FPS of my camera is setted by IC Capture 2.2 at 50 FPS (camera DFK 72AUCO2) in 640*480, but in my application I developped, I can't get any information about the framerate by using OpenCV functions and the display is really slow, I think it is about 10 FPS.

    This isn't enough to do what I have to do, so, please, I would like to know:

    -How can I set the FrameRate of my camera without using imaging source's functions? I just can't use them because I'm don't using visual C++ and the headers I add in my Qt project doesn't compile.

    -Are the camera properties saved into a file in which I can Read/Write ? Or into some register key? How can I access to them whithout functions like setFPS or setFramerate?

    I really thank you for your help and for your answers.
    Best Regards,
    Last edited by fsor; April 14, 2011 at 13:26:43.

  2. #2
    Join Date
    Jan 2003
    Bremen, Germany

    Re: setFPS without Imaging source library (using Qt Creator + OpenCV), How can I do?


    the correct address of your question is the OpenCV support, because OpenCV is not a product of us. They must offer all the properties you need, if you use their SDK.

    I am very sorry for not having a better answer. I thought about DirectShow programming (have a look into MSDN) but I think, this wont work in your case, because the camera is handled by OpenCV.

    There is a last method you may use: It is a C Wrapper for the IC Classlibrary, that can be used for image acquisition. You can handle the camera completely and receive a pointer to the image data, which can be passed to the cvImageBuffer.

    Maybe this is an option? If so, create a support case at
    Best regards
    IC Imaging Control Support

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