public double[,] GetAffineQuad(double[,] coeffs)
{
double[,] quad = new double[4, 2];
NppiRect rect = new NppiRect(_pointRoi, _sizeRoi);
status = NPPNativeMethods.NPPi.AffinTransforms.nppiGetAffineQuad(rect, quad, coeffs);
Debug.WriteLine(String.Format("{0:G}, {1}: {2}", DateTime.Now, "nppiGetAffineQuad", status));
NPPException.CheckNppStatus(status, this);
return quad;
}