/usr/include/tesseract/convolve.h is in libtesseract-dev 4.00~git2288-10f4998a-2.
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// File: convolve.h
// Description: Convolutional layer that stacks the inputs over its rectangle
// and pulls in random data to fill out-of-input inputs.
// Output is therefore same size as its input, but deeper.
// Author: Ray Smith
// Created: Tue Mar 18 16:45:34 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_CONVOLVE_H_
#define TESSERACT_LSTM_CONVOLVE_H_
#include "genericvector.h"
#include "matrix.h"
#include "network.h"
namespace tesseract {
// Makes each time-step deeper by stacking inputs over its rectangle. Does not
// affect the size of its input. Achieves this by bringing in random values in
// out-of-input areas.
class Convolve : public Network {
public:
// The area of convolution is 2*half_x + 1 by 2*half_y + 1, forcing it to
// always be odd, so the center is the current pixel.
Convolve(const STRING& name, int ni, int half_x, int half_y);
virtual ~Convolve();
virtual STRING spec() const {
STRING spec;
spec.add_str_int("C", half_x_ * 2 + 1);
spec.add_str_int(",", half_y_ * 2 + 1);
return spec;
}
// Writes to the given file. Returns false in case of error.
virtual bool Serialize(TFile* fp) const;
// 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);
protected:
// Serialized data.
int32_t half_x_;
int32_t half_y_;
};
} // namespace tesseract.
#endif // TESSERACT_LSTM_SUBSAMPLE_H_
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