Question

我正在创建一个面部识别应用程序，我发现了一个名为MultiFaceRec的示例，但这是搜索以bmp格式编号的文件夹中保存的图像以及保存的txt文件中的人物名称。按顺序加上图片编号。

    #region Searching for txt file

    //Load of previus trainned faces and labels for each image
    string Labelsinfo = File.ReadAllText(Application.StartupPath + "/TrainedFaces/TrainedLabels.txt");
    string[] Labels = Labelsinfo.Split('%');
    NumLabels = Convert.ToInt16(Labels[0]);
    ContTrain = NumLabels;
    string LoadFaces;

    for (int tf = 1; tf < NumLabels + 1; tf++)
    {
        LoadFaces = "face" + tf + ".bmp";
        trainingImages.Add(new Image<Gray, byte>(Application.StartupPath + "/TrainedFaces/" + LoadFaces));
        labels.Add(Labels[tf]);
    }

    #endregion

我试图通过直接查看数据库来更改此设置，在该数据库中，我有一个图像字段和一个带有人名的字段。

SqlConnection conConexao = clsdb.AbreBanco();
            SqlCommand cmd = new SqlCommand("select fotografia, nome from pessoa  where fotografia is not null", conConexao);
            SqlDataReader dr = cmd.ExecuteReader();

            if (dr.HasRows == true)
            {
                while (dr.Read())
                {

                    byte[] imageSource = (byte[])dr["fotografia"];
                    Bitmap image;

                    using (MemoryStream stream = new MemoryStream(imageSource))
                    {
                        image = new Bitmap(stream);
                    }



                    trainingImages.Add(new Image<Gray, byte>(image));
                    labels.Add(dr["Nome"].ToString());
             }            
       }

但是在这种方法中我遇到了一个错误：

#region static methods
      /// <summary>
      /// Caculate the eigen images for the specific traning image
      /// </summary>
      /// <param name="trainingImages">The images used for training </param>
      /// <param name="termCrit">The criteria for tranning</param>
      /// <param name="eigenImages">The resulting eigen images</param>
      /// <param name="avg">The resulting average image</param>
      public static void CalcEigenObjects(Image<Gray, Byte>[] trainingImages, ref MCvTermCriteria termCrit, out Image<Gray, Single>[] eigenImages, out Image<Gray, Single> avg)
      {
         int width = trainingImages[0].Width;
         int height = trainingImages[0].Height;

         IntPtr[] inObjs = Array.ConvertAll<Image<Gray, Byte>, IntPtr>(trainingImages, delegate(Image<Gray, Byte> img) { return img.Ptr; });

         if (termCrit.max_iter <= 0 || termCrit.max_iter > trainingImages.Length)
            termCrit.max_iter = trainingImages.Length;

         int maxEigenObjs = termCrit.max_iter;

         #region initialize eigen images
         eigenImages = new Image<Gray, float>[maxEigenObjs];
         for (int i = 0; i < eigenImages.Length; i++)
            eigenImages[i] = new Image<Gray, float>(width, height);
         IntPtr[] eigObjs = Array.ConvertAll<Image<Gray, Single>, IntPtr>(eigenImages, delegate(Image<Gray, Single> img) { return img.Ptr; });
         #endregion

         avg = new Image<Gray, Single>(width, height);

         CvInvoke.cvCalcEigenObjects(
             inObjs,
             ref termCrit,
             eigObjs,
             null,
             avg.Ptr);
      }

错误是： Emgu.CV.Util.CvException：'OpenCV：不同大小的对象'

在数据库中搜索图像时如何解决？

更改用于在数据库的txt文件中查找图像的代码

0 个答案: