Creating a wrapper for C# and converting Bitmap

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No, it has to be C++ code...

Sorry, so what do you want exactly? A C++ wrapper for C#, and with OpenCV?

I wrote my image processing code in C++ and now i want to use it in a C# project. From the link above I have learned that I can do it by creating a managed wrapper in C++/CLI. I want to know is there any other way and how can i convert Bitmaps from c# to Mat so i can use it in C++.

In fact, C# related problems are not really involved to this forum (see more at FAQ-http://answers.opencv.org/faq/), but now I understand that you have two requirements: use your C++ IP code in a C# project and convert a Bitmaps from C# to Mat to handle it by C++. Both of those can be solved simply by using a true C# wrapper since your IP code calls functions from OpenCV, you can call them with C# code and do not need to convert a Bitmap from C# to Mat (and with C++ again). That why I suggest you to use Emgu CV. And if the reason for your C# usage is the GUI only, you can choose QT or even MFC and forget the C# code, as well as C# Bitmap to C++ Mat conversion.

I don't want to use Emgu CV because I want my IP code to be platform independent. I'm not too familiar with C++ and started learning it only recently, I know it enough to write my IP code. GUI is one of the reasons as well as serial port communication my app has to have, I'm not quite sure how to do it in C++. Thanks for the advice.