tf.nn.ctc_greedy_decoder #473

src/TensorFlowNET.Core/APIs/tf.graph.cs

@@ -21,7 +21,7 @@ namespace Tensorflow
     public partial class tensorflow
     {
         public graph_util_impl graph_util => new graph_util_impl();
-
+        public GraphTransformer graph_transforms => new GraphTransformer();
         public GraphKeys GraphKeys { get; } = new GraphKeys();
 
         public void reset_default_graph() 

src/TensorFlowNET.Core/APIs/tf.nn.cs

@@ -46,6 +46,9 @@ namespace Tensorflow
                 return gen_nn_ops.conv2d(parameters);
             }
 
+            public Tensor[] ctc_greedy_decoder(Tensor inputs, Tensor sequence_length, bool merge_repeated = true, string name = null)
+                => gen_ctc_ops.ctc_greedy_decoder(inputs, sequence_length, merge_repeated: merge_repeated, name: name);
+
             /// <summary>
             /// Computes dropout.
             /// </summary>

src/TensorFlowNET.Core/GraphTransformation/GraphTransformer.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Tensorflow
+{
+    public class GraphTransformer
+    {
+        /// <summary>
+        /// Graph Transform Tool
+        /// https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/graph_transforms/README.md
+        /// </summary>
+        /// <param name="input_graph_def">GraphDef object containing a model to be transformed</param>
+        /// <param name="inputs">the model inputs</param>
+        /// <param name="outputs">the model outputs</param>
+        /// <param name="transforms">transform names and parameters</param>
+        /// <returns></returns>
+        public GraphDef TransformGraph(GraphDef input_graph_def, 
+            string[] inputs, 
+            string[] outputs, 
+            string[] transforms)
+        {
+            var input_graph_def_string = input_graph_def.ToString();
+            var inputs_string = string.Join(",", inputs);
+            var outputs_string = string.Join(",", outputs);
+            var transforms_string = string.Join(",", transforms);
+
+            throw new NotImplementedException("");
+        }
+    }
+}

src/TensorFlowNET.Core/Operations/ctc_ops.cs

@@ -0,0 +1,67 @@
+/*****************************************************************************
+   Copyright 2018 The TensorFlow.NET Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+******************************************************************************/
+
+using System;
+using System.Linq;
+using Tensorflow.Operations;
+using static Tensorflow.Binding;
+
+namespace Tensorflow
+{
+    public class ctc_ops
+    {
+        /// <summary>
+        ///    Performs greedy decoding on the logits given in inputs.
+        /// </summary>
+        /// <param name="inputs">
+        ///    3-D, shape: <c>(max_time x batch_size x num_classes)</c>, the logits.
+        /// </param>
+        /// <param name="sequence_length">
+        ///    A vector containing sequence lengths, size <c>(batch_size)</c>.
+        /// </param>
+        /// <param name="name">
+        /// If specified, the created operation in the graph will be this one, otherwise it will be named 'CTCGreedyDecoder'.
+        /// </param>
+        /// <param name="merge_repeated">
+        ///    If True, merge repeated classes in output.
+        /// </param>
+        /// <returns>
+        ///    Returns a tuple with multiple values, as follows:
+        ///    decoded_indices : Indices matrix, size <c>(total_decoded_outputs x 2)</c>,
+        ///    of a <c>SparseTensor&amp;lt;int64, 2&amp;gt;</c>.  The rows store: [batch, time].
+        ///    decoded_values : Values vector, size: <c>(total_decoded_outputs)</c>,
+        ///    of a <c>SparseTensor&amp;lt;int64, 2&amp;gt;</c>.  The vector stores the decoded classes.
+        ///    decoded_shape : Shape vector, size <c>(2)</c>, of the decoded SparseTensor.
+        ///    Values are: <c>[batch_size, max_decoded_length]</c>.
+        ///    log_probability : Matrix, size <c>(batch_size x 1)</c>, containing sequence
+        ///    log-probabilities.
+        ///    The Operation can be fetched from any of the Tensorreturned in the tuple values, by fetching the Operation property.
+        /// </returns>
+        /// <remarks>
+        ///    A note about the attribute merge_repeated: if enabled, when
+        ///    consecutive logits' maximum indices are the same, only the first of
+        ///    these is emitted.  Labeling the blank '*', the sequence "A B B * B B"
+        ///    becomes "A B B" if merge_repeated = True and "A B B B B" if
+        ///    merge_repeated = False.
+        ///    
+        ///    Regardless of the value of merge_repeated, if the maximum index of a given
+        ///    time and batch corresponds to the blank, index <c>(num_classes - 1)</c>, no new
+        ///    element is emitted.
+        /// </remarks>
+        public Tensor[] ctc_greedy_decoder(Tensor inputs, Tensor sequence_length, bool merge_repeated = true, string name = null)
+                => gen_ctc_ops.ctc_greedy_decoder(inputs, sequence_length, merge_repeated: merge_repeated, name: name);
+    }
+}

src/TensorFlowNET.Core/Operations/gen_ctc_ops.cs

@@ -0,0 +1,38 @@
+/*****************************************************************************
+   Copyright 2018 The TensorFlow.NET Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+******************************************************************************/
+
+namespace Tensorflow
+{
+    public class gen_ctc_ops
+    {
+        public static OpDefLibrary _op_def_lib = new OpDefLibrary();
+
+        public static Tensor[] ctc_greedy_decoder(Tensor inputs, Tensor sequence_length, bool merge_repeated = true, string name = "CTCGreedyDecoder")
+        {
+            var op = _op_def_lib._apply_op_helper("CTCGreedyDecoder", name: name, args: new
+            {
+                inputs,
+                sequence_length,
+                merge_repeated
+            });
+            /*var decoded_indices = op.outputs[0];
+            var decoded_values = op.outputs[1];
+            var decoded_shape = op.outputs[2];
+            var log_probability = op.outputs[3];*/
+            return op.outputs;
+        }
+    }
+}

src/TensorFlowNet.Benchmarks/Benchmark.csproj

@@ -19,7 +19,8 @@
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.12.0" />
-    <PackageReference Include="TensorFlow.NET" Version="0.12.0" />
+    <PackageReference Include="SciSharp.TensorFlow.Redist" Version="1.14.1" />
+    <PackageReference Include="TensorFlow.NET" Version="0.13.0" />
   </ItemGroup>
 
 </Project>