// Declare a 2D convolver
    let convolveXY kernel input
       = // First convolve in the X direction and then in the Y direction
         let convolveX = convolve (fun i -> [| -i; 0 |]) kernel (kernel.Length - 1) input
         let convolveY = convolve (fun i -> [| 0; -i |]) kernel (kernel.Length - 1) convolveX
         convolveY

    // Create a DX9 target and use it to convolve the test input
    use dx9Target = new DX9Target()
    let convolveDX9 = dx9Target.ToArray2D (convolveXY testKernel testArray)  //Run convolver on testarray

    printfn "DX9: -> \r\n%A" convolveDX9