Passing .Net Bitmap to C++ Dll

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    Passing .Net Bitmap to C++ Dll

    Ok, I have a .Net application but i want to do all the image processing within a C++ dll for speed. What would be the best way to achieve this? How would I pass the .Net Bitmap to the dll, I mean what would the C++ Dll parameter be? Also does anyone know any good C++ Image Processing resources? I guess I'm just a little loss on how this would work. Thanks in advance all

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    Confused Magos's Avatar
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    C++ has no idea what a .NET bitmap is so you can't just pass it like that.
    Consider creating a C++.NET project as you can use both raw C++ and .NET features, and interoperate using marshalling.
    Interop can be expensive so unless your image computations are really heavy you might decrease performance.
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    What if I was to pass the Bitmap as an RGB int array? because the program processes images constantly.

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    Bitmaps consist of more than just an RGB array (IIRC 24bit colour depth bitmaps are BGR).

    You may be able to use the Bitmap.GetHbitmap() and pass the HBITMAP to the C++ DLL.


    What image processing do you want to do?

    OCR or something with edge detection, stretches etc?
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    The Image Processing functions in which I currently have Include Invert, Cropping, Scalling, Brighten, Sharpen, Blur, gray scale, ect.... and at times OCR will be needed.

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