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188 lines
8.6 KiB
C++
188 lines
8.6 KiB
C++
/**********************************************************************
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* File: topitch.h (Formerly to_pitch.h)
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* Description: Code to determine fixed pitchness and the pitch if fixed.
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* Author: Ray Smith
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*
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* (C) Copyright 1993, Hewlett-Packard Ltd.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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#ifndef TOPITCH_H
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#define TOPITCH_H
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#include "blobbox.h"
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namespace tesseract {
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class Tesseract;
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}
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extern BOOL_VAR_H (textord_debug_pitch_test, false,
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"Debug on fixed pitch test");
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extern BOOL_VAR_H (textord_debug_pitch_metric, false,
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"Write full metric stuff");
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extern BOOL_VAR_H (textord_show_row_cuts, false, "Draw row-level cuts");
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extern BOOL_VAR_H (textord_show_page_cuts, false, "Draw page-level cuts");
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extern BOOL_VAR_H (textord_pitch_cheat, false,
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"Use correct answer for fixed/prop");
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extern BOOL_VAR_H (textord_blockndoc_fixed, true,
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"Attempt whole doc/block fixed pitch");
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extern BOOL_VAR_H (textord_fast_pitch_test, false,
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"Do even faster pitch algorithm");
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extern double_VAR_H (textord_projection_scale, 0.125,
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"Ding rate for mid-cuts");
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extern double_VAR_H (textord_balance_factor, 2.0,
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"Ding rate for unbalanced char cells");
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void compute_fixed_pitch(ICOORD page_tr, // top right
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TO_BLOCK_LIST* port_blocks, // input list
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float gradient, // page skew
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FCOORD rotation, // for drawing
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bool testing_on); // correct orientation
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void fix_row_pitch( //get some value
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TO_ROW *bad_row, //row to fix
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TO_BLOCK *bad_block, //block of bad_row
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TO_BLOCK_LIST *blocks, //blocks to scan
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int32_t row_target, //number of row
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int32_t block_target //number of block
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);
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void compute_block_pitch(TO_BLOCK* block, // input list
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FCOORD rotation, // for drawing
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int32_t block_index, // block number
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bool testing_on); // correct orientation
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bool compute_rows_pitch( //find line stats
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TO_BLOCK* block, //block to do
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int32_t block_index, //block number
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bool testing_on //correct orientation
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);
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bool try_doc_fixed( //determine pitch
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ICOORD page_tr, //top right
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TO_BLOCK_LIST* port_blocks, //input list
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float gradient //page skew
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);
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bool try_block_fixed( //find line stats
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TO_BLOCK* block, //block to do
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int32_t block_index //block number
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);
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bool try_rows_fixed( //find line stats
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TO_BLOCK* block, //block to do
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int32_t block_index, //block number
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bool testing_on //correct orientation
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);
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void print_block_counts( //find line stats
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TO_BLOCK *block, //block to do
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int32_t block_index //block number
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);
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void count_block_votes( //find line stats
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TO_BLOCK *block, //block to do
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int32_t &def_fixed, //add to counts
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int32_t &def_prop,
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int32_t &maybe_fixed,
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int32_t &maybe_prop,
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int32_t &corr_fixed,
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int32_t &corr_prop,
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int32_t &dunno);
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bool row_pitch_stats( //find line stats
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TO_ROW* row, //current row
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int32_t maxwidth, //of spaces
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bool testing_on //correct orientation
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);
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bool find_row_pitch( //find lines
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TO_ROW* row, //row to do
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int32_t maxwidth, //max permitted space
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int32_t dm_gap, //ignorable gaps
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TO_BLOCK* block, //block of row
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int32_t block_index, //block_number
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int32_t row_index, //number of row
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bool testing_on //correct orientation
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);
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bool fixed_pitch_row( //find lines
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TO_ROW* row, //row to do
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BLOCK* block,
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int32_t block_index //block_number
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);
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bool count_pitch_stats( //find lines
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TO_ROW* row, //row to do
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STATS* gap_stats, //blob gaps
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STATS* pitch_stats, //centre-centre stats
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float initial_pitch, //guess at pitch
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float min_space, //estimate space size
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bool ignore_outsize, //discard big objects
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bool split_outsize, //split big objects
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int32_t dm_gap //ignorable gaps
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);
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float tune_row_pitch( //find fp cells
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TO_ROW* row, //row to do
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STATS* projection, //vertical projection
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int16_t projection_left, //edge of projection
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int16_t projection_right, //edge of projection
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float space_size, //size of blank
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float& initial_pitch, //guess at pitch
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float& best_sp_sd, //space sd
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int16_t& best_mid_cuts, //no of cheap cuts
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ICOORDELT_LIST* best_cells, //row cells
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bool testing_on //inidividual words
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);
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float tune_row_pitch2( //find fp cells
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TO_ROW* row, //row to do
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STATS* projection, //vertical projection
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int16_t projection_left, //edge of projection
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int16_t projection_right, //edge of projection
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float space_size, //size of blank
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float& initial_pitch, //guess at pitch
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float& best_sp_sd, //space sd
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int16_t& best_mid_cuts, //no of cheap cuts
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ICOORDELT_LIST* best_cells, //row cells
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bool testing_on //inidividual words
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);
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float compute_pitch_sd( //find fp cells
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TO_ROW* row, //row to do
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STATS* projection, //vertical projection
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int16_t projection_left, //edge
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int16_t projection_right, //edge
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float space_size, //size of blank
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float initial_pitch, //guess at pitch
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float& sp_sd, //space sd
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int16_t& mid_cuts, //no of free cuts
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ICOORDELT_LIST* row_cells, //list of chop pts
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bool testing_on, //inidividual words
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int16_t start = 0, //start of good range
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int16_t end = 0 //end of good range
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);
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float compute_pitch_sd2( //find fp cells
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TO_ROW* row, //row to do
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STATS* projection, //vertical projection
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int16_t projection_left, //edge
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int16_t projection_right, //edge
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float initial_pitch, //guess at pitch
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int16_t& occupation, //no of occupied cells
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int16_t& mid_cuts, //no of free cuts
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ICOORDELT_LIST* row_cells, //list of chop pts
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bool testing_on, //inidividual words
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int16_t start = 0, //start of good range
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int16_t end = 0 //end of good range
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);
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void print_pitch_sd( //find fp cells
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TO_ROW *row, //row to do
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STATS *projection, //vertical projection
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int16_t projection_left, //edges //size of blank
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int16_t projection_right,
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float space_size,
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float initial_pitch //guess at pitch
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);
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void find_repeated_chars(TO_BLOCK* block, // Block to search.
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bool testing_on); // Debug mode.
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void plot_fp_word( //draw block of words
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TO_BLOCK *block, //block to draw
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float pitch, //pitch to draw with
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float nonspace //for space threshold
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);
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#endif
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