add parameter layer for learning any bottom

diff --git a/include/caffe/layers/parameter_layer.hpp b/include/caffe/layers/parameter_layer.hpp
new file mode 100644 (file)
index 0000000..188b92a
--- /dev/null
+++ b/include/caffe/layers/parameter_layer.hpp
@@ -0,0 +1,45 @@
+#ifndef CAFFE_PARAMETER_LAYER_HPP_
+#define CAFFE_PARAMETER_LAYER_HPP_
+
+#include <vector>
+
+#include "caffe/layer.hpp"
+
+namespace caffe {
+
+template <typename Dtype>
+class ParameterLayer : public Layer<Dtype> {
+ public:
+  explicit ParameterLayer(const LayerParameter& param)
+      : Layer<Dtype>(param) {}
+  virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top) {
+    if (this->blobs_.size() > 0) {
+      LOG(INFO) << "Skipping parameter initialization";
+    } else {
+      this->blobs_.resize(1);
+      this->blobs_[0].reset(new Blob<Dtype>());
+      this->blobs_[0]->Reshape(this->layer_param_.parameter_param().shape());
+    }
+    top[0]->Reshape(this->layer_param_.parameter_param().shape());
+  }
+  virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top) { }
+  virtual inline const char* type() const { return "Parameter"; }
+  virtual inline int ExactNumBottomBlobs() const { return 0; }
+  virtual inline int ExactNumTopBlobs() const { return 1; }
+
+ protected:
+  virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
+      const vector<Blob<Dtype>*>& top) {
+    top[0]->ShareData(*(this->blobs_[0]));
+    top[0]->ShareDiff(*(this->blobs_[0]));
+  }
+  virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
+      const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom)
+  { }
+};
+
+}  // namespace caffe
+
+#endif

diff --git a/src/caffe/layers/parameter_layer.cpp b/src/caffe/layers/parameter_layer.cpp
new file mode 100644 (file)
index 0000000..fbd326f
--- /dev/null
+++ b/src/caffe/layers/parameter_layer.cpp
@@ -0,0 +1,8 @@
+#include "caffe/layers/parameter_layer.hpp"
+
+namespace caffe {
+
+INSTANTIATE_CLASS(ParameterLayer);
+REGISTER_LAYER_CLASS(Parameter);
+
+}  // namespace caffe

diff --git a/src/caffe/proto/caffe.proto b/src/caffe/proto/caffe.proto
index ea40e60..1581071 100644 (file)
--- a/src/caffe/proto/caffe.proto
+++ b/src/caffe/proto/caffe.proto
@@ -306,7 +306,7 @@ message ParamSpec {
 // NOTE
 // Update the next available ID when you add a new LayerParameter field.
 //
-// LayerParameter next available layer-specific ID: 145 (last added: crop_param)
+// LayerParameter next available layer-specific ID: 146 (last added: parameter_param)
 message LayerParameter {
   optional string name = 1; // the layer name
   optional string type = 2; // the layer type
@@ -385,6 +385,7 @@ message LayerParameter {
   optional LRNParameter lrn_param = 118;
   optional MemoryDataParameter memory_data_param = 119;
   optional MVNParameter mvn_param = 120;
+  optional ParameterParameter parameter_param = 145;
   optional PoolingParameter pooling_param = 121;
   optional PowerParameter power_param = 122;
   optional PReLUParameter prelu_param = 131;
@@ -873,6 +874,10 @@ message MVNParameter {
   optional float eps = 3 [default = 1e-9];
 }
 
+message ParameterParameter {
+  optional BlobShape shape = 1;
+}
+
 message PoolingParameter {
   enum PoolMethod {
     MAX = 0;