public FrontFaceVerifier(string template) { if (string.IsNullOrEmpty(template)) { throw new ArgumentException("template can't be null", "template"); } if (!System.IO.File.Exists(template)) { throw new System.IO.FileNotFoundException("template file not found", template); } var ipl = OpenCvSharp.IplImage.FromFile(template, LoadMode.GrayScale); _verifier = new FaceProcessingWrapper.FrontFaceVerifier(ipl); }