/// <summary>
/// Create a 2D kernel from two 1D kernels via outer product.
///
/// Swapping the two 1D kernel parameters gives the transposed 2D kernel.
/// </summary>
public static Matrix <float> Create2DKernel(
Vector <float> kernelX, Vector <float> kernelY)
{
return(Matrix <float> .CreateOuterProduct(kernelX, kernelY, (x, y) => x *y));
}