tesseract 4.1.1
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maxpool.h
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1
2// File: maxpool.h
3// Description: Standard Max-Pooling layer.
4// Author: Ray Smith
5// Created: Tue Mar 18 16:28:18 PST 2014
6//
7// (C) Copyright 2014, Google Inc.
8// Licensed under the Apache License, Version 2.0 (the "License");
9// you may not use this file except in compliance with the License.
10// You may obtain a copy of the License at
11// http://www.apache.org/licenses/LICENSE-2.0
12// Unless required by applicable law or agreed to in writing, software
13// distributed under the License is distributed on an "AS IS" BASIS,
14// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15// See the License for the specific language governing permissions and
16// limitations under the License.
18
19#ifndef TESSERACT_LSTM_MAXPOOL_H_
20#define TESSERACT_LSTM_MAXPOOL_H_
21
22#include "reconfig.h"
23
24namespace tesseract {
25
26// Maxpooling reduction. Independently for each input, selects the location
27// in the rectangle that contains the max value.
28// Backprop propagates only to the position that was the max.
29class Maxpool : public Reconfig {
30 public:
31 Maxpool(const STRING& name, int ni, int x_scale, int y_scale);
32 ~Maxpool() override = default;
33
34 // Accessors.
35 STRING spec() const override {
39 return spec;
40 }
41
42 // Reads from the given file. Returns false in case of error.
43 bool DeSerialize(TFile* fp) override;
44
45 // Runs forward propagation of activations on the input line.
46 // See Network for a detailed discussion of the arguments.
47 void Forward(bool debug, const NetworkIO& input,
48 const TransposedArray* input_transpose,
49 NetworkScratch* scratch, NetworkIO* output) override;
50
51 // Runs backward propagation of errors on the deltas line.
52 // See Network for a detailed discussion of the arguments.
53 bool Backward(bool debug, const NetworkIO& fwd_deltas,
54 NetworkScratch* scratch,
55 NetworkIO* back_deltas) override;
56
57 private:
58 // Memory of which input was the max.
60};
61
62
63} // namespace tesseract.
64
65
66
67
68
69#endif // TESSERACT_LSTM_MAXPOOL_H_
Definition: strngs.h:45
void add_str_int(const char *str, int number)
Definition: strngs.cpp:377
bool Backward(bool debug, const NetworkIO &fwd_deltas, NetworkScratch *scratch, NetworkIO *back_deltas) override
Definition: maxpool.cpp:71
~Maxpool() override=default
bool DeSerialize(TFile *fp) override
Definition: maxpool.cpp:29
STRING spec() const override
Definition: maxpool.h:35
void Forward(bool debug, const NetworkIO &input, const TransposedArray *input_transpose, NetworkScratch *scratch, NetworkIO *output) override
Definition: maxpool.cpp:37
const STRING & name() const
Definition: network.h:138
int32_t y_scale_
Definition: reconfig.h:83
int32_t x_scale_
Definition: reconfig.h:82