I'm using Background Removal wpf sample with kinect.
i want to get input from webcam instead of kinect camera.
what is the best method to implement this?
The background removal with kinect is based on depth information provided by the kinect sensor. If you want to remove the background from the images provided by a webcam, the depth information is not availble and a fundamentally different approach is required.
See here to get an idea how this can be achieved.
Related
I am currently working on a WPF project and is required to do clench to select instead of the default press and release gesture.
I have search high and low for a guide or tutorial on it but was unable to find any up to date resources sadly.
These are the current default gestures.
Where can I find the default gesture files so i can remove the logic or if i am able to replace and overwrite the current code to have a kinect cursor selection.
Thanks in advance!
Where can I find the default gesture files so i can remove the logic
You can't find them since Kinect SDK is not open source. Source is not available.
if i am able to replace and overwrite the current code to have a
kinect cursor selection.
Yes you can, you need to implement your self using skeleton joint data of the Bodyframe.
For example I have implemented following gestures in my project VRInteraction
Engage and disengage gestures
Click gesture
Rotation gesture
Swipe gesture
Video demo
If you need more info, you can read the IEEE paper
Model-Free 3D Interaction with Rotation and Swipe Gestures Using Kinect
If you need code reference,
VRInteraction in github
https://github.com/shanilfernando/VRInteraction/blob/master/Gesture.cpp
If you have more questions, please comment here, I'm more than happy to help you.
For plotting graphs I used the coreplot library for a while in my MonoTouch based iPhone app, but with iOS 6.0 the already annoying binding problems become so many that I decided to drop it for a library natively written in C#.
Searching around I found the excellent OxyPlot 2D library, and more specifically the MonoTouch port made by dvkwong.
The library works fine and has tons of useful features, but its output is just a rendered bitmap UIImage.
This means that I need to add myself the pinch and zoom features to the library.
The current implementation, based on the dvkwong preliminary example, uses the UIScrollView to zoom and unzoom the resulting bitmap image added to a simple subview.
This is not a good solution because when zooming the aliasing of the bitmap is made visible , and if the resolution is increased the text fonts becomes unreadable because are not optimized for the current zoom resolution.
I need to render the image each time at the correct resolution, without using UIScrollView but just overriding the DrawRect() call in a custom UIView.
But how to reproduce the the pinch-zoom gesture of Apple UIScrollView and draw the correct subrect of the OxyPlot plot model?
I tried to implement this method suggested here:
position the pinched view between the two fingers
But it doesn't work because I need to know the sub rect to draw, not applying a transformation matrix. Also there is no "draw sub rect" method in the OxyPlot library, so I need to set a cliprect in the image context and drawing a bigger image first and then clipping it. This is clearly too slow, because at some zoom levels the image can become huge (and I need the user to be able to zoom indefinitely on any part of the graph).
Any help is appreciated.
Thanks in advance.
I solved the problem myself.
I've created another MonoTouch port of the OxyPlot 2D library, this time supporting both Pan & Pinch-Zoom gestures. I've also added iPad support.
Now we have a native C# plot library for MonoTouch.
You can download it under the MIT Licence here:
https://github.com/Emasoft/OxyPlot.2DGraphLib.MonoTouch
I am need to capture video and click images via camera, in My application. I am a bit new to WPF and searching on google I found that ExpressionEncoder dll is used to perform video captures in WPF. I also need to change brightness, Contrast, saturation of video but I did not find it in expressionencoder code.
So can anyone tell how to set Brightness,contrast,... using ExpressionEncoder Dll Or Do I need to try something else?
Thanks in anticipation.
While you are using encoder dll for recording videos. please find below links.
http://www.codeproject.com/Articles/285964/WPF-Webcam-Control
http://blog.catenalogic.com/post/2009/01/08/WPF-Webcam-Control-part-2.aspx
http://easywebcam.codeplex.com/
We have a few icons in our WPF application. We want to do an animation, pretty much like a small beacon of light going around the edges of the animation, just endlessly going around it, and following the silhouette of the icons. We found a way to do it by manually creating a path around the icons and have the beacon follow that path (which matches the silhouette), but it's too much manual work because we have a lot of different shaped icons. We're wondering if there's a way for WPF to do this automatically, so we just have to program it once, and then using on the rest of the icons.
Any suggestion very welcome.
Thanks.
Edit
Something like this.
Gee. Isn't that overkill to use wpf animation capabilities for that? Can't you just create a bunch of small animations in Photoshop or using something else and just put them in?
Like animated .GIFs. the only problem would be that: if I'm remembering it right, WPF have problems with animating .GIFs as embedded resources. So you have to load them from the disk. Or you can have them as embedded resources, but you have to extract them temporarily to the disk and then load them into your app's window.
If you are using .NET 3.5 SP1 or greater and you are requiring a code solution instead of the animated GIFs, my suggestion would be a Pixel Shader. You would need to write your own Pixel Shader that does the following:
Detect the edges. http://www.codeproject.com/KB/openGL/EdgeDetection.aspx
Takes an input parameter that can be animated with a storyboard that indicates the position of the beacon. http://www.codeproject.com/KB/dialog/WpfParentWindowShader.aspx
Highlights the edge that is indicated by the beacon position parameter and returns the original color for all other points in the image.
If you haven't worked with Pixel Shaders I would recommend downloading the Shazzam Tool, http://shazzam-tool.com/. It includes an interactive development environment to create and test your shader on simple images and also includes a decent number of Pixel Shaders with source code to help you learn about them.
I am trying to evaluate which technology is best for my needs.
I need to display a video I get from some remote device, and let a user
interactively draw on it lines, polygons etc.
I searched and couldn't find any existing applications with this ability
(all the flash applications only displayed video).
Could anyone point me to such an application?
I haven't seen a specific app that allows you to do that, but I can tell you it would be fairly trivial to build it in Flex. You would simply create a transparent Sprite over the video clip, then use the Drawing API bound to various mouse events to do your drawing.
The final image can be saved by using BitmapData.draw() over the container that holds both the video and the canvas, and you can pass a bytearray encoded as PNG or JPG to a server-side script to save it.
I can't speak to Silverlight as I've never used it - but a Flex dev could build a basic sample of this for you in Flex in about 20 mins just as a proof of concept.
Where does your expertise lie?
Silverlight you could knock up a proof of concept rather easily and as Myk points out you could do the same in Flex. So your best bet is really whichever technology your current expertise lies in.
In Silverlight you could use a InkPresenter control above a MediaElement control in about 2 minutes up and running with a video file.
I think the hard part is finding a way to display realtime video from your specific device.
Silverlight supports streaming video so having that device talk with Windows Media Server or Silverlight Streaming sounds like the best bet.
Julie Lerman wrote an Silverlight app that you can draw on Images:
http://thedatafarm.com/blog/tablet/drawing-in-silverlight-article-in-msdn-magazine/
the article was presented at a magazine:
http://msdn.microsoft.com/en-us/magazine/cc721604.aspx
Hopes this helps.