Read and write an image

As of now, ArcV works with matrices of the type float. A matrix is defined by:

Arcv::Matrix<T> mat;

You should then work with Arcv::Matrix<float>, though an alternative is available:

Arcv::Matrix<> mat;  // Default template parameter is set to float
Arcv::Mat mat;  // Mat is typedef'd to Matrix<>

Now, back to business. To read an image, you simply have to call:

Arcv::Mat mat = Arcv::Image::read("input.png");

Then, after your modifications are made, simply do the following:

Arcv::Image::write(mat, "output.png");

And you're done, your image is now saved!