crop_layer.hpp
#ifndef CAFFE_CROP_LAYER_HPP_
#define CAFFE_CROP_LAYER_HPP_
#include <utility>
#include <vector>
#include "caffe/blob.hpp"
#include "caffe/layer.hpp"
#include "caffe/proto/caffe.pb.h"
namespace caffe {
template <typename Dtype>
class CropLayer : public Layer<Dtype> {
public:
explicit CropLayer(const LayerParameter& param)
: Layer<Dtype>(param) {}
virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual inline const char* type() const { return "Crop"; }
virtual inline int ExactNumBottomBlobs() const { return 2; }
virtual inline int ExactNumTopBlobs() const { return 1; }
protected:
virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
virtual void Forward_gpu(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void Backward_gpu(const vector<Blob<Dtype>*>& top,
const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
Blob<int> offsets;
Blob<int> src_strides_;
Blob<int> dest_strides_;
private:
// Recursive copy function.
void crop_copy(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top,
const int* offsets,
vector<int> indices,
int cur_dim,
const Dtype* src_data,
Dtype* dest_data,
bool is_forward);
// Recursive copy function: this is similar to crop_copy() but loops over all
// but the last two dimensions to allow for ND cropping while still relying on
// a CUDA kernel for the innermost two dimensions for performance reasons. An
// alterantive implementation could rely on the kernel more by passing
// offsets, but this is problematic because of its variable length.
// Since in the standard (N,C,W,H) case N,C are usually not cropped a speedup
// could be achieved by not looping the application of the copy_kernel around
// these dimensions.
void crop_copy_gpu(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top,
const vector<int>& offsets,
vector<int> indices,
int cur_dim,
const Dtype* src_data,
Dtype* dest_data,
bool is_forward);
};
} // namespace caffe
#endif // CAFFE_CROP_LAYER_HPP_
caffe::CropLayer::Forward_gpu
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.
caffe::CropLayer::Backward_cpu
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: crop_layer.cpp:132
caffe::CropLayer::Forward_cpu
virtual void Forward_cpu(const vector< Blob< Dtype > * > &bottom, const vector< Blob< Dtype > * > &top)
Using the CPU device, compute the layer output.
Definition: crop_layer.cpp:122
caffe::Blob
A wrapper around SyncedMemory holders serving as the basic computational unit through which Layers,...
Definition: blob.hpp:24
caffe::Layer
An interface for the units of computation which can be composed into a Net.
Definition: layer.hpp:33
caffe::CropLayer::type
virtual const char * type() const
Returns the layer type.
Definition: crop_layer.hpp:30
caffe::CropLayer
Takes a Blob and crop it, to the shape specified by the second input Blob, across all dimensions afte...
Definition: crop_layer.hpp:21
caffe::CropLayer::Reshape
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: crop_layer.cpp:36
caffe::CropLayer::ExactNumTopBlobs
virtual int ExactNumTopBlobs() const
Returns the exact number of top blobs required by the layer, or -1 if no exact number is required.
Definition: crop_layer.hpp:32
caffe::CropLayer::ExactNumBottomBlobs
virtual int ExactNumBottomBlobs() const
Returns the exact number of bottom blobs required by the layer, or -1 if no exact number is required.
Definition: crop_layer.hpp:31
caffe::CropLayer::Backward_gpu
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_...
caffe
A layer factory that allows one to register layers. During runtime, registered layers can be called b...
Definition: blob.hpp:14
caffe::CropLayer::LayerSetUp
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: crop_layer.cpp:16