/usr/include/tesseract/reversed.h is in libtesseract-dev 4.00~git2288-10f4998a-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | ///////////////////////////////////////////////////////////////////////
// File: reversed.h
// Description: Runs a single network on time-reversed input, reversing output.
// Author: Ray Smith
// Created: Thu May 02 08:38:06 PST 2013
//
// (C) Copyright 2013, 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_REVERSED_H_
#define TESSERACT_LSTM_REVERSED_H_
#include "matrix.h"
#include "plumbing.h"
namespace tesseract {
// C++ Implementation of the Reversed class from lstm.py.
class Reversed : public Plumbing {
public:
explicit Reversed(const STRING& name, NetworkType type);
virtual ~Reversed();
// Returns the shape output from the network given an input shape (which may
// be partially unknown ie zero).
virtual StaticShape OutputShape(const StaticShape& input_shape) const;
virtual STRING spec() const {
STRING spec(type_ == NT_XREVERSED ? "Rx"
: (type_ == NT_YREVERSED ? "Ry" : "Txy"));
// For most simple cases, we will output Rx<net> or Ry<net> where <net> is
// the network in stack_[0], but in the special case that <net> is an
// LSTM, we will just output the LSTM's spec modified to take the reversal
// into account. This is because when the user specified Lfy64, we actually
// generated TxyLfx64, and if the user specified Lrx64 we actually
// generated RxLfx64, and we want to display what the user asked for.
STRING net_spec = stack_[0]->spec();
if (net_spec[0] == 'L') {
// Setup a from and to character according to the type of the reversal
// such that the LSTM spec gets modified to the spec that the user
// asked for
char from = 'f';
char to = 'r';
if (type_ == NT_XYTRANSPOSE) {
from = 'x';
to = 'y';
}
// Change the from char to the to char.
for (int i = 0; i < net_spec.length(); ++i) {
if (net_spec[i] == from) net_spec[i] = to;
}
return net_spec;
}
spec += net_spec;
return spec;
}
// Takes ownership of the given network to make it the reversed one.
void SetNetwork(Network* network);
// 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:
// Copies src to *dest with the reversal according to type_.
void ReverseData(const NetworkIO& src, NetworkIO* dest) const;
};
} // namespace tesseract.
#endif // TESSERACT_LSTM_REVERSED_H_
|