/usr/include/tesseract/maxpool.h is in libtesseract-dev 4.00~git2288-10f4998a-2.
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// File: maxpool.h
// Description: Standard Max-Pooling layer.
// Author: Ray Smith
// Created: Tue Mar 18 16:28:18 PST 2014
//
// (C) Copyright 2014, Google Inc.
// 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.
///////////////////////////////////////////////////////////////////////
#ifndef TESSERACT_LSTM_MAXPOOL_H_
#define TESSERACT_LSTM_MAXPOOL_H_
#include "reconfig.h"
namespace tesseract {
// Maxpooling reduction. Independently for each input, selects the location
// in the rectangle that contains the max value.
// Backprop propagates only to the position that was the max.
class Maxpool : public Reconfig {
public:
Maxpool(const STRING& name, int ni, int x_scale, int y_scale);
virtual ~Maxpool();
// Accessors.
virtual STRING spec() const {
STRING spec;
spec.add_str_int("Mp", y_scale_);
spec.add_str_int(",", x_scale_);
return spec;
}
// Reads from the given file. Returns false in case of error.
virtual bool DeSerialize(TFile* fp);
// Runs forward propagation of activations on the input line.
// See Network for a detailed discussion of the arguments.
virtual void Forward(bool debug, const NetworkIO& input,
const TransposedArray* input_transpose,
NetworkScratch* scratch, NetworkIO* output);
// Runs backward propagation of errors on the deltas line.
// See Network for a detailed discussion of the arguments.
virtual bool Backward(bool debug, const NetworkIO& fwd_deltas,
NetworkScratch* scratch,
NetworkIO* back_deltas);
private:
// Memory of which input was the max.
GENERIC_2D_ARRAY<int> maxes_;
};
} // namespace tesseract.
#endif // TESSERACT_LSTM_MAXPOOL_H_
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