Caffe
reduction_layer.hpp
1 #ifndef CAFFE_REDUCTION_LAYER_HPP_
2 #define CAFFE_REDUCTION_LAYER_HPP_
3 
4 #include <vector>
5 
6 #include "caffe/blob.hpp"
7 #include "caffe/layer.hpp"
8 #include "caffe/proto/caffe.pb.h"
9 
10 namespace caffe {
11 
19 template <typename Dtype>
20 class ReductionLayer : public Layer<Dtype> {
21  public:
22  explicit ReductionLayer(const LayerParameter& param)
23  : Layer<Dtype>(param) {}
24  virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
25  const vector<Blob<Dtype>*>& top);
26  virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
27  const vector<Blob<Dtype>*>& top);
28 
29  virtual inline const char* type() const { return "Reduction"; }
30  virtual inline int ExactNumBottomBlobs() const { return 1; }
31  virtual inline int ExactNumTopBlobs() const { return 1; }
32 
33  protected:
34  virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
35  const vector<Blob<Dtype>*>& top);
36  virtual void Forward_gpu(const vector<Blob<Dtype>*>& bottom,
37  const vector<Blob<Dtype>*>& top);
38  virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
39  const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
40  virtual void Backward_gpu(const vector<Blob<Dtype>*>& top,
41  const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
42 
44  ReductionParameter_ReductionOp op_;
46  Dtype coeff_;
48  int axis_;
50  int num_;
52  int dim_;
55 };
56 
57 } // namespace caffe
58 
59 #endif // CAFFE_REDUCTION_LAYER_HPP_
virtual void Backward_cpu(const vector< Blob< Dtype > *> &top, const vector< bool > &propagate_down, const vector< Blob< Dtype > *> &bottom)
Using the CPU device, compute the gradients for any parameters and for the bottom blobs if propagate_...
Definition: reduction_layer.cpp:77
virtual void LayerSetUp(const vector< Blob< Dtype > *> &bottom, const vector< Blob< Dtype > *> &top)
Does layer-specific setup: your layer should implement this function as well as Reshape.
Definition: reduction_layer.cpp:9
An interface for the units of computation which can be composed into a Net.
Definition: layer.hpp:33
A layer factory that allows one to register layers. During runtime, registered layers can be called b...
Definition: blob.hpp:14
virtual void Forward_cpu(const vector< Blob< Dtype > *> &bottom, const vector< Blob< Dtype > *> &top)
Using the CPU device, compute the layer output.
Definition: reduction_layer.cpp:42
int dim_
the input size of each reduction
Definition: reduction_layer.hpp:52
virtual void Reshape(const vector< Blob< Dtype > *> &bottom, const vector< Blob< Dtype > *> &top)
Adjust the shapes of top blobs and internal buffers to accommodate the shapes of the bottom blobs...
Definition: reduction_layer.cpp:15
virtual int ExactNumTopBlobs() const
Returns the exact number of top blobs required by the layer, or -1 if no exact number is required...
Definition: reduction_layer.hpp:31
virtual int ExactNumBottomBlobs() const
Returns the exact number of bottom blobs required by the layer, or -1 if no exact number is required...
Definition: reduction_layer.hpp:30
Blob< Dtype > sum_multiplier_
a helper Blob used for summation (op_ == SUM)
Definition: reduction_layer.hpp:54
ReductionParameter_ReductionOp op_
the reduction operation performed by the layer
Definition: reduction_layer.hpp:44
Compute "reductions" – operations that return a scalar output Blob for an input Blob of arbitrary si...
Definition: reduction_layer.hpp:20
virtual void Forward_gpu(const vector< Blob< Dtype > *> &bottom, const vector< Blob< Dtype > *> &top)
Using the GPU device, compute the layer output. Fall back to Forward_cpu() if unavailable.
virtual const char * type() const
Returns the layer type.
Definition: reduction_layer.hpp:29
Dtype coeff_
a scalar coefficient applied to all outputs
Definition: reduction_layer.hpp:46
int num_
the number of reductions performed
Definition: reduction_layer.hpp:50
virtual void Backward_gpu(const vector< Blob< Dtype > *> &top, const vector< bool > &propagate_down, const vector< Blob< Dtype > *> &bottom)
Using the GPU device, compute the gradients for any parameters and for the bottom blobs if propagate_...
int axis_
the index of the first input axis to reduce
Definition: reduction_layer.hpp:48
A wrapper around SyncedMemory holders serving as the basic computational unit through which Layers...
Definition: blob.hpp:24