Solve ObjectDetection functions

src/TensorFlowNET.Core/Sessions/BaseSession.cs

@@ -217,6 +217,12 @@ namespace Tensorflow
                     var str = UTF8Encoding.Default.GetString(bytes, 9, bytes[8]);
                     nd = np.array(str).reshape();
                     break;
+                case TF_DataType.TF_UINT8:
+                    var _bytes = new byte[tensor.size];
+                    for (ulong i = 0; i < tensor.size; i++)
+                        _bytes[i] = *(byte*)(offset + (int)(tensor.itemsize * i));
+                    nd = np.array(_bytes).reshape(ndims);
+                    break;
                 case TF_DataType.TF_INT16:
                     var shorts = new short[tensor.size];
                     for (ulong i = 0; i < tensor.size; i++)

src/TensorFlowNET.Core/Tensors/Tensor.Creation.cs

@@ -67,7 +67,8 @@ namespace Tensorflow
                 case "Double":
                     Marshal.Copy(nd1.Data<double>(), 0, dotHandle, nd.size);
                     break;
-                //case "Byte":
+                case "Byte":
+                    Marshal.Copy(nd1.Data<byte>(), 0, dotHandle, nd.size);
                     /*var bb = nd.Data<byte>();
                     var bytes = Marshal.AllocHGlobal(bb.Length);
                     Marshal.Copy(bb, 0, bytes, bb.Length);

src/TensorFlowNET.Core/Tensors/Tensor.cs

@@ -195,6 +195,7 @@ namespace Tensorflow
                 case "Double":
                     return TF_DataType.TF_DOUBLE;
                 case "Byte":
+                    return TF_DataType.TF_UINT8;
                 case "String":
                     return TF_DataType.TF_STRING;
                 default:

test/TensorFlowNET.Examples/ObjectDetection.cs

@@ -28,7 +28,7 @@ namespace TensorFlowNET.Examples
 
         public bool Run()
         {
-            //buildOutputImage(null);
+            PrepareData();
 
             // read in the input image
             var imgArr = ReadTensorFromImageFile(Path.Join(imageDir, "input.jpg"));
@@ -91,7 +91,7 @@ namespace TensorFlowNET.Examples
             // download the pbtxt file
             if (!File.Exists(Path.Join(modelDir, "mscoco_label_map.pbtxt")))
             {
-                string url = $"https://github.com/tensorflow/models/blob/master/research/object_detection/data/mscoco_label_map.pbtxt";
+                string url = $"https://raw.githubusercontent.com/tensorflow/models/master/research/object_detection/data/mscoco_label_map.pbtxt";
                 Utility.Web.Download(url, modelDir, "mscoco_label_map.pbtxt");
             }
         }
@@ -123,7 +123,6 @@ namespace TensorFlowNET.Examples
                 float score = scores[i];
                 if (score > MIN_SCORE)
                 {
-                    //var boxes = resultArr[1].Data<float[,,]>();
                     float[] boxes = resultArr[1].Data<float>();
                     float top = boxes[i * 4] * bitmap.Height;
                     float left = boxes[i * 4 + 1] * bitmap.Width;