/usr/include/tesseract/topitch.h is in libtesseract-dev 3.02.01-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* File: topitch.h (Formerly to_pitch.h)
* Description: Code to determine fixed pitchness and the pitch if fixed.
* Author: Ray Smith
* Created: Tue Aug 24 16:57:29 BST 1993
*
* (C) Copyright 1993, Hewlett-Packard Ltd.
** 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 TOPITCH_H
#define TOPITCH_H
#include "blobbox.h"
#include "notdll.h"
namespace tesseract {
class Tesseract;
}
extern BOOL_VAR_H (textord_debug_pitch_test, FALSE,
"Debug on fixed pitch test");
extern BOOL_VAR_H (textord_debug_pitch_metric, FALSE,
"Write full metric stuff");
extern BOOL_VAR_H (textord_show_row_cuts, FALSE, "Draw row-level cuts");
extern BOOL_VAR_H (textord_show_page_cuts, FALSE, "Draw page-level cuts");
extern BOOL_VAR_H (textord_pitch_cheat, FALSE,
"Use correct answer for fixed/prop");
extern BOOL_VAR_H (textord_blockndoc_fixed, TRUE,
"Attempt whole doc/block fixed pitch");
extern BOOL_VAR_H (textord_fast_pitch_test, FALSE,
"Do even faster pitch algorithm");
extern double_VAR_H (textord_projection_scale, 0.125,
"Ding rate for mid-cuts");
extern double_VAR_H (textord_balance_factor, 2.0,
"Ding rate for unbalanced char cells");
void compute_fixed_pitch(ICOORD page_tr, // top right
TO_BLOCK_LIST *port_blocks, // input list
float gradient, // page skew
FCOORD rotation, // for drawing
BOOL8 testing_on); // correct orientation
void fix_row_pitch( //get some value
TO_ROW *bad_row, //row to fix
TO_BLOCK *bad_block, //block of bad_row
TO_BLOCK_LIST *blocks, //blocks to scan
inT32 row_target, //number of row
inT32 block_target //number of block
);
void compute_block_pitch( TO_BLOCK *block, // input list
FCOORD rotation, // for drawing
inT32 block_index, // block number
BOOL8 testing_on); // correct orientation
BOOL8 compute_rows_pitch( //find line stats
TO_BLOCK *block, //block to do
inT32 block_index, //block number
BOOL8 testing_on //correct orientation
);
BOOL8 try_doc_fixed( //determine pitch
ICOORD page_tr, //top right
TO_BLOCK_LIST *port_blocks, //input list
float gradient //page skew
);
BOOL8 try_block_fixed( //find line stats
TO_BLOCK *block, //block to do
inT32 block_index //block number
);
BOOL8 try_rows_fixed( //find line stats
TO_BLOCK *block, //block to do
inT32 block_index, //block number
BOOL8 testing_on //correct orientation
);
void print_block_counts( //find line stats
TO_BLOCK *block, //block to do
inT32 block_index //block number
);
void count_block_votes( //find line stats
TO_BLOCK *block, //block to do
inT32 &def_fixed, //add to counts
inT32 &def_prop,
inT32 &maybe_fixed,
inT32 &maybe_prop,
inT32 &corr_fixed,
inT32 &corr_prop,
inT32 &dunno);
BOOL8 row_pitch_stats( //find line stats
TO_ROW *row, //current row
inT32 maxwidth, //of spaces
BOOL8 testing_on //correct orientation
);
BOOL8 find_row_pitch( //find lines
TO_ROW *row, //row to do
inT32 maxwidth, //max permitted space
inT32 dm_gap, //ignorable gaps
TO_BLOCK *block, //block of row
inT32 block_index, //block_number
inT32 row_index, //number of row
BOOL8 testing_on //correct orientation
);
BOOL8 fixed_pitch_row( //find lines
TO_ROW *row, //row to do
BLOCK* block,
inT32 block_index //block_number
);
BOOL8 count_pitch_stats( //find lines
TO_ROW *row, //row to do
STATS *gap_stats, //blob gaps
STATS *pitch_stats, //centre-centre stats
float initial_pitch, //guess at pitch
float min_space, //estimate space size
BOOL8 ignore_outsize, //discard big objects
BOOL8 split_outsize, //split big objects
inT32 dm_gap //ignorable gaps
);
float tune_row_pitch( //find fp cells
TO_ROW *row, //row to do
STATS *projection, //vertical projection
inT16 projection_left, //edge of projection
inT16 projection_right, //edge of projection
float space_size, //size of blank
float &initial_pitch, //guess at pitch
float &best_sp_sd, //space sd
inT16 &best_mid_cuts, //no of cheap cuts
ICOORDELT_LIST *best_cells, //row cells
BOOL8 testing_on //inidividual words
);
float tune_row_pitch2( //find fp cells
TO_ROW *row, //row to do
STATS *projection, //vertical projection
inT16 projection_left, //edge of projection
inT16 projection_right, //edge of projection
float space_size, //size of blank
float &initial_pitch, //guess at pitch
float &best_sp_sd, //space sd
inT16 &best_mid_cuts, //no of cheap cuts
ICOORDELT_LIST *best_cells, //row cells
BOOL8 testing_on //inidividual words
);
float compute_pitch_sd ( //find fp cells
TO_ROW * row, //row to do
STATS * projection, //vertical projection
inT16 projection_left, //edge
inT16 projection_right, //edge
float space_size, //size of blank
float initial_pitch, //guess at pitch
float &sp_sd, //space sd
inT16 & mid_cuts, //no of free cuts
ICOORDELT_LIST * row_cells, //list of chop pts
BOOL8 testing_on, //inidividual words
inT16 start = 0, //start of good range
inT16 end = 0 //end of good range
);
float compute_pitch_sd2 ( //find fp cells
TO_ROW * row, //row to do
STATS * projection, //vertical projection
inT16 projection_left, //edge
inT16 projection_right, //edge
float initial_pitch, //guess at pitch
inT16 & occupation, //no of occupied cells
inT16 & mid_cuts, //no of free cuts
ICOORDELT_LIST * row_cells, //list of chop pts
BOOL8 testing_on, //inidividual words
inT16 start = 0, //start of good range
inT16 end = 0 //end of good range
);
void print_pitch_sd( //find fp cells
TO_ROW *row, //row to do
STATS *projection, //vertical projection
inT16 projection_left, //edges //size of blank
inT16 projection_right,
float space_size,
float initial_pitch //guess at pitch
);
void find_repeated_chars(TO_BLOCK *block, // Block to search.
BOOL8 testing_on); // Debug mode.
void plot_fp_word( //draw block of words
TO_BLOCK *block, //block to draw
float pitch, //pitch to draw with
float nonspace //for space threshold
);
#endif
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