/// <summary> /// /// </summary> /// <param name="m"></param> /// <param name="roi"></param> public GpuMat(GpuMat m, CvRect roi) { if (m == null) { throw new ArgumentNullException("m"); } ptr = GpuInvoke.GpuMat_new10(m.CvPtr, (CvRect)roi); if (ptr == IntPtr.Zero) { throw new OpenCvSharpException(); } }