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    Updating images in a wpf application

    Let's try a simple example where we use a Dispatcher Timer to create a digital clock: The XAML part is extremely simple - it's merely a centered label with a large font size, used to display the current time.

    Code-behind is where the magic happens in this example.

    This object is what allows you to get a hold of the UI thread’s Dispatcher.

    Ironically, this is also the reason why you cannot update the controls from threads that don’t own it.

    WPF attempts to provide a consistent programming model for building applications and separates the user interface from business logic.

    It resembles similar XML-oriented object models, such as those implemented in XUL and SVG.

    So, I was working on object tracking a few months back. So this library also provides some basic functions to rip the image stream off your cam. Asking it to work for WPF wouldn’t be that difficult. I might just put up another blog post to show how they work.

    The basic task I faced while doing this was getting the image stream in a format that is easy to process upon later. Problems arise when your ‘stream-fetching’ functions try to access the UI controls. public Filter Info Collection Cams Collection; public Video Capture Device Cam=null; void Cam_New Frame(object sender, New Frame Event Args event Args) privatevoid startcam_Click(object sender, Routed Event Args e) privatevoid stopcam_Click(object sender, Routed Event Args e) I made a class library called Compatibility, which you can find here in my Codeplex and Github repositories. public Filter Info Collection Cams Collection; public Video Capture Device Cam=null; void Cam_New Frame(object sender, New Frame Event Args event Args) privatevoid startcam_Click(object sender, Routed Event Args e) privatevoid stopcam_Click(object sender, Routed Event Args e) So what is Dispatcher?

    Build beautiful transitions and visualizations using Blend’s full suite of vector drawing tools, powerful template editing features, real-time animation, visual state management and more.The Dispatcher Timer class works by specifying an interval and then subscribing to the Tick event that will occur each time this interval is met.The Dispatcher Timer is not started before you call the Start() method or set the Is Enabled property to true.But I think this is a very fluent method of ensuring thread-safety.Still if you want to update some asynchronously, you can use the Dispatcher.

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