Question

I’ve looked for this problem but I don’t know (and haven’t found) how to solve it. Does anyone here know how to solve the problem? I’m using EMGU, but the issue is with the c# coding (I’m reasonably new to C#) – I think it’s to do with the out statement as I haven’t used them much:

Image<Gray, Byte> first_image;

if (start_at_frame_1 == true)
{
    Perform_custom_routine(imput_frame, out first_image);
}
else
{
     Perform_custom_routine(imput_frame, out second_image);
}

Comparison(first_image);

Answer 1

You must give default value to the variable:

Image<Gray, Byte> first_image = null;

Otherwise there is a chance you won’t assign anything, if you pass second_image as the out parameter.