Easy Motion Detection

• Download demo project - 53.1 Kb
• Download source - 27.2 Kb

Introduction

When I did another project, I got this stupid method to implement motion detection.

I tried some other way to do this motion detection. And I got frustrated when I use them. Because I don t really need any advanced algorithms to do this one. I was in thinking and got a nice idea to do it. And U also can do it now.

Just about 5 lines in Visual C++ .NET code and few lines in Flash Action Script.

Background + Prerequisites

You should be pre installed the .NET version 1.1 and Flash player 6 or higher for testing this code. They are freely available here.

Download .NET 1.1 redistributable package from here. and Flash player http://www.adobe.com/products/flashplayer/

Using the code

The first message is coming when the application starts. And the others are coming when it detects motion. The camera preview part and the motion detecting part are being actually done by the flash scripts. And finally the Visual C++ .NET application gets the motion via VC COM interface fscommand();

    //get the real camera & set the motion level + quality

    camera = Camera.get();
    camera.setMotionLevel(25, 2);
    camera.setQuality(0,5);

    //embedded video object

    myVideoObject.hide();
    //get the preview

    myVideoObject.attachVideo(camera);


    //call when camera detects a motion

    camera.onActivity = function(mode)
    {
        if (mode)
        {
            trace("Kawru hari awa. Camerawa langata.");
            //get into the Visual C++

            fscommand("MOTION_DETECTED", "OK");
        }

    };

Camera.get();will return the camera object with the default connected interface. Then we can set the motion level and the quality. Finally attach the camera object to the Embedded Video object.

when activity happened it gives the feed into the VC++.

private: 
    AxInterop::ShockwaveFlashObjects::AxShockwaveFlash*  axShockwaveFlash1;

    String* sFlashPath = System::Environment::CurrentDirectory;
    String* sCurrentDir = sFlashPath;
    //set the path of GUI

    file = new String("\\detector.swf");
    sFlashPath = String::Concat(sFlashPath, file);

    iStartApp = 0;

    //load Main detector GUI

    axShockwaveFlash1->LoadMovie(0, sFlashPath);

In Visual C++.NET just use the axShockwaveFlash COM interface to load the Main Flash GUI. Then use axShockwaveFlash1_FSCommand event to interface with the COM.

Additional Resources

• Macromedia Flash Live Doc (Camera class)