I've different angle 2D images(images of one particular object), I want to merge all that three images and create one 3D Image.
How can I do that in Unity 3D?
The process you're looking for is called Photogrammetry. To get good quality models, you'll want more than 3 images. This process is very CPU intensive and takes a long time, you won't want this built into your Unity3D Game/App. You'll want to generate the models with external tools, then import them.
If you actually are looking for a C# way to do this, I only know of one opensource library working on this. Epicycle.Photogrammetry-cs.
If you want to manage the whole process of the conversion, check out this tutorial using only open source software.
This YouTube tutorial is easy to follow (I've done it myself), and also uses only free software.
If you're looking for a more polished, less technical solution, try ReMake by Autodesk
If you're looking for a completely hands off process, try 123D Catch by Autodesk
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I am using WPF application for photo gallery and I would like to add face recognition to my app.
Any suggestions to do that?
WPF itself won't help yo at all: it's just a way of defining what happens in a Window. You would need to add code utilising a suitable Machine Learning library capable of detecting faces in photos.
I won't go into how the ML libraries need to be set up and trained, or how there might be one already suitably primed available (I don't know). That's a rather large subject and is nothing to do with any presentation layer technology.
I really like how 2D Shapes work in MS PowerPoint. I was wondering if there any library for C# .NET that would allow me to use same functionality with easy in my application.
I am looking for adding 2D shapes, re-sizing, moving, snapping two shapes to each other, group re-sizing, rotating, showing help lines when you snap two shapes together.
I tried to google and search here on stackexchange but came across few libraries that require a lot of manual work to get simple things working.
So my questions is: Is there any .NET library to be able include shapes functionality into my application with limited effort and short time.
Please share your experience if you have used any of the libraries.
Thanks in advance.
I'm working on small WPF desktop app to track a robot. I have a Kinect for Windows on my desk and I was able to do the basic features and run the Depth camera stream and the RGB camera stream.
What I need is to track a robot on the floor but I have no idea where to start. I found out that I should use EMGU (OpenCV wrapper)
What I want to do is track a robot and find it's location using the depth camera. Basically, it's for localization of the robot using Stereo Triangulation. Then using TCP and Wifi to send the robot some commands to move him from one place to an other using both the RGB and Depth camera. The RGB camera will also be used to map the object in the area so that the robot can take the best path and avoid the objects.
The problem is that I have never worked with Computer Vision before and it's actually my first, I'm not stuck to a deadline and I'm more than willing to learn all the related stuff to finish this project.
I'm looking for details, explanation, hints, links or tutorials to achieve my need.
Thanks.
Robot localization is a very tricky problem and I myself have been struggling for months now, I can tell you what I have achieved But you have a number of options:
Optical Flow Based Odometery: (Also known as visual odometry):
Extract keypoints from one image or features (I used Shi-Tomashi, or cvGoodFeaturesToTrack)
Do the same for a consecutive image
Match these features (I used Lucas-Kanade)
Extract depth information from Kinect
Calculate transformation between two 3D point clouds.
What the above algorithm is doing is it is trying to estimate the camera motion between two frames, which will tell you the position of the robot.
Monte Carlo Localization: This is rather simpler, but you should also use wheel odometery with it.
Check this paper out for a c# based approach.
The method above uses probabalistic models to determine the robot's location.
The sad part is even though libraries exist in C++ to do what you need very easily, wrapping them for C# is a herculean task. If you however can code a wrapper, then 90% of your work is done, the key libraries to use are PCL and MRPT.
The last option (Which by far is the easiest, but the most inaccurate) is to use KinectFusion built in to the Kinect SDK 1.7. But my experiences with it for robot localization have been very bad.
You must read Slam for Dummies, it will make things about Monte Carlo Localization very clear.
The hard reality is, that this is very tricky and you will most probably end up doing it yourself. I hope you dive into this vast topic, and would learn awesome stuff.
For further information, or wrappers that I have written. Just comment below... :-)
Best
Not sure if is would help you or not...but I put together a Python module that might help.
http://letsmakerobots.com/node/38883#comments
I'm an electronics engineer used to coding in embedded C and assembly, but I decided to start learning higher-level stuff like C#, .NET, etc., so I can start making software as a hobby. I have a great idea for one of my first projects, but after searching several forums for days on end, I'm left not really knowing what would be the easiest path forward.
The functionality that I'm looking to create is pretty similar to the idea of a photo slideshow, but applied to videos instead. The program would open a playlist or a folder full of videos and then play the videos in a random order, starting from a random starting position, and with a fixed duration (let's say 10 seconds as an example). You would end up being able to watch a sort of "video montage" that consisted of small clips from random parts of the videos in the playlist, shown in a random order, ad infinitum until the program is closed.
There are a number of ways I could tackle the problem:
Develop a standalone video player with the fixed functionality of showing "video slideshows." DirectX has the Microsoft.DirectX.AudioVideoPlayback API that
could be a good starting point. I found an example here: http://www.dreamincode.net/forums/topic/111181-adding-video-to-an-application/
Modify an open source project to add the desired functionality. I've seen a few cool projects that could get me started, like this simple C# Movie Player: http://www.codeproject.com/Articles/18552/C-Movie-Player
Use a scripting interface to implement this functionality on an existing media player, like VLC or Winamp. You could also control VLC via C#, like the example here: Controlling VLC via c#
I realize that the obvious answer for most people would be to "use whatever you're most comfortable with," but since I'm a pure beginner, I don't really have any allegiances to a particular language or development environment. So, I was just curious if anybody had an idea of what might be the least painful option for a beginner.
I also apologize that this is not a very specific programming question. I'm sort of just testing the waters to get my footing. Hopefully, once I get started on the project, I'll be able to come back and post more intelligent and relevant questions!
While your background would lend you toward C#, I recommend investigating something like this and using WPF for the media player. You can then control the media player using a background worker in order to stop the video or queue up the next one. Some other .NET concepts that will be of use to you are FileInfo and DirectoryInfo objects, to provide you with the necessary information about the files. I'm not sure if you've had experience with generic data structures in .NET, but the System.Collections.Generic namespace would be a good place to start to get a feel for data structure you want to keep your playlist in. WPF will also be able to help you with transitions between video clips.
Admittedly WPF is easier with an understanding of the MVVM or MVC design patterns, but I think you'll be able to get something working without having to delve too far into that right up front.
I am working on the development of a Massively Multiplayer Online Role Playing Game (MMORPG) in .NET using C# and Silverlight. One of the features that has been requested for this game is to allow players to upload their own avatars.
Rather than displaying the uploaded images in their raw forms, we want to convert the images to a cartoon form--in other words to cartoonize the image.
Several sites which can accomplish such a task are listed at http://www.hongkiat.com/blog/11-sites-to-create-cartoon-characters-of-yourself/
I realize that these sites are applying an image filter to create the cartoon image. Frankly, I have no reasonable idea what these cartoon image filter algorithms might look like or if there is anything already available in C# or .NET that I could use. If there are no libraries available, I am curious how difficult it would be to roll my own.
This is a minor game feature so I am not interested in devoting a week or more of coding time to implement this. However, if I can code up what I need within a day, then it is probably viable.
At this point, I am primarily looking for guidance as to
what is possible
what libraries are already available (preferably as open source)
where i may find additional information
any other advice or guidance you may be able to provide
Thank you in advance!
Apparently you apply a Gaussian Blur filter to the image. Then you sharpen the image. Perhaps the AForge libraries would help you out.
I've used code from the image processing lab on code project before with success. (update: here's the library it uses)
Christian Graus also has written a whole series on GDI image processing which I found useful (and has the effects listed above for filtering capabilities).