Switch to C++

I've decided to switch to C++, primarily because I like to use default parameters. For example, in the OpenCV 0.9.6 Documentation the Canny edge detector is defined as:

void cvCanny( const CvArr* image, CvArr* edges, double threshold1,
double threshold2, int aperture_size=3 );

That means that you can call cvCanny like this:

cvCanny(sourceimage, resultimage, low_threshold, high_threshold);

Or like this:

cvCanny(sourceimage, resultimage, low_threshold, high_threshold, aperature_size);

And either way will work in C++. C does not support this functionality. So, from now on, anything I post here probably won't compile like this:

gcc test.cpp -o test `pkg-config --libs opencv --cflags opencv`

But it will compile like this:

g++ test.cpp -o test `pkg-config --libs opencv --cflags opencv`

Even though the underlying program may be entirely C except for the OpenCV calls.