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does anyone know an open source c# dll for Computational Geometry.
I'm starting an open-source Computational Geometry library for .NET here: https://github.com/govert/RobustGeometry.NET.
So far I have the robust geometric predicates of Shewchuk ported to C#, and I'm working on a helfedge mesh representation.
Any help would be appreciated!
There isn't much out there, unfortunately -- the .NET world seems to suffer from a paucity of good open-source math libraries. The best readily available commercial alternative is probably Ceometric's G#, which is neither free nor open-source.
aforgenet library originally meant for image processing/computer vision/ machine learning AI , does have some good deal of features that can help you!
http://www.aforgenet.com/framework/
There is a library named Geolib at http://www.geolib.co.uk/.
I am just starting to use it and till now its works fine for me!
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I am looking for a spatial index library in C# that has to be able to index geometries (circles, polygons, polylines) as well as answer intersection questions. I found NetTopologySuite (NTS) and some other one-file solution project but I wonder if I missed anything significant?
NTS is pretty good but somewhat heavy. The second one is a one man art and apparently I have to pick it up and maintain myself. I wonder if I can find something that is supported and tested.
I am looking for C# one but if I can get hands on Java one, I can adapt that.
libspatialindex seems to have all the features you want, but it's in C++
JSI is a Java project, but it only works with rectangles.
I am not 100% sure but i guess Solr and Elastic search supports spatial index. They are in Java and they support REST.
I found some good examples here http://www.rtreeportal.org/
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It's pretty much all in the title: what library would you recommend to perform principal component analysis? I'm looking for free and simple to use - performance is not necessarily a criterion so far as I just want to play around with the concept and see what I get. Google got me this:
http://crsouza.blogspot.com/2009/09/principal-component-analysis-in-c.html
Anyone tried this? How good is it? Would you have any other recommendation?
I have used PCA in SPSS and Matlab. This is a good place to start learning it, as those applications have already got all the infrastructure ready for you (like lots of plots and supportive tests).
If you are looking for something in C#, take a look at the Accord framework and maybe this sample here
Thanks for the help guys. I eventually decided to implement the algorithm myself, using Math.Net Numerics to lay the matrix groundwork and ARPACK to do the hard work of finding the biggest eigenvectors of the correlation matrix (I don't need of all them). Subject closed.
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I'm working on a project which compares image files. Before I start I decided to ask for external sources, like a commercial SDK or something open source.
I tried to write a sample where it compares 2 image files too measure how similar they are, and output a percentage result. But no luck, long time to execute and weak precision. So if someone had experience in that direction that will help me.
http://www.imagemagick.org/script/compare.php
AForge.NET is excellent...
AForge.NET
The frameworks below is the best for image processing in C#
AForge.NET
Accord.NET
Emgu CV
Really not sure about requirement , what kind of similarity you want. If you can put more details, i can help you out.
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I'm a .Net C# Developer. I want to develop the media programming about video/audio codec, capture media from source, etc. I'm going to use the DirectShow Lib, but I read it on MSDN, and I'm very confused, because I'm a beginner.
Do you have the best tutorials or some article that can make beginner understand to program in the DirectShow architecture? If so, please share them.
You will find these useful:
http://www.codeproject.com/KB/directx/PrgmngDirectShowappsCS.aspx
http://www.codeproject.com/KB/directx/directshowmediaplayer.aspx
http://www.codeproject.com/KB/directx/directshownet.aspx
http://www.codeproject.com/KB/directx/MPEG2_Capture_Device.aspx
Oh and these too:
http://www.codeproject.com/KB/audio-video/dshowencoder.aspx
http://www.codeproject.com/KB/directx/rendering.aspx
http://www.codeproject.com/KB/windows/samplegrabberfilter-wm6.aspx
http://www.codeproject.com/KB/audio-video/Tanvon_DirectShowFilters.aspx
Hope that helps.
Regards
Richard
Dude, IMO It's better develop direct show in C++, you just should learn how to create COM object and uninitialize it, C++ is faster, and current available library of direct show all are in c++, cases which are in code project in c# are good for learning basic of direct show, but they aren't practical solutions. they are COM wrapper to use them in C#, the speed is main concern and their speed in real time video analyzing is not good. the MSDN is best reference for working with directshow and there are good samples in SDK
Just read DirectShow SDK in MSDN from beginning. Then install GraphEditPlus, try building some graphs and then from File menu you can generate C# code which builds these graphs using DirectShowLib for .NET and see how it does it.
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I'm looking for libraries to build attractive interfaces. Someone told me about Fluid (http://fluid.codeplex.com/) but it's very difficult to use.
Anyone knows others?
My project is for Compact Framework 2.0 SP2, C#, and it's going to use in Windows Mobile 5.0 and above.
Thank you!
you should check out the Silvermoon project. if uses opengl to make great looking UI´s. just tried it on my phone and it looks great.
I have been looking for the same recently. Resco MobileForms Toolkit is one option, but in the end (because I didn't want to pay for any third party libraries) I just wrote a few controls of my own - this was quite a useful starting resource, but it is 3.5 focussed. I think your options may be much more limited if you still want to support version 5.0.