MeeGo 1.2 released

Intel headed MeeGo mobile operating system recently reached v1.2. MeeGo was initially had started off as a merger between Nokia's Maemo and Intel's Moblin. It was designed to run in Intel and ARM architectures and was targeted to various devices; from mobile phones to in-vehicle entertainment. Its a Linux - based operating system and thus that makes it an open source project.

In February, Nokia choose to make Windows Phone as default operating system for its smart phone and backed off from this project. Not many had hoped MeeGo would survive since Nokia was a important part of the project. But Intel was firm to continue development and had its own plans. 

Overview of EmguCV

One of my projects required me to work with OpenCV libraries in Windows platform. OpenCV as you all know is in C language. I wanted to give a nice interface to my project. Since the codes were in C, i initially thought of implementing it using Visual C++.

3 reasons that made me drop VC++
  • The setup to make OpenCV work with VC++ was not that simple.
  • The quality of interface developed is not very good.
  • C# and some of the other .NET compatible languages are more stable than C. I came to this conclusion because for me the code in C used to crash more than in C#.

I found C# language provided better and simpler interface development tools. Thats when i started looking for .NET wrapper for OpenCV. There are lots of open-source .NET wrappers available. Here's a clear comparison between them. Out of them i found EmguCV is the better one and decided to use it.

Emgu CV is a cross platform .Net wrapper. Allowing OpenCV functions to be called from .NET compatible languages such as C#, VB etc. The wrapper can be compiled in Mono and run on Linux / Mac OS X.
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Use of Hough circles in OpenCV

OpenCV provides and inbuilt function to detect circles in your image. The Hough transform is a technique which can be used to isolate features of a particular shape within an image. The implementation of the circle  transform in OpenCV uses a tricky method called the Hough gradient method ( Link to Google Books ).

cvHoughCircles( ) is the function provided in OpenCV.

CvSeq* cvHoughCircles( 
        CvArr* image,         
        void*  circle_storage, 
        int    method, 
        double dp, 
        double min_dist, 
        double param1 = 100, 
        double param2 = 300, 
        int    min_radius = 0, 
        int    max_radius = 0 

Following is a example code snippet.
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