/********************************************************************** * 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( //determine 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 tesseract::Tesseract* tess ); 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( //process each block TO_BLOCK *block, //input list FCOORD rotation, //for drawing inT32 block_index, //block number BOOL8 testing_on, //correct orientation tesseract::Tesseract* tess ); 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 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 ); int sort_floats2( //qsort function const void *arg1, //ptrs to floats const void *arg2); void find_repeated_chars( //search for equal chars TO_BLOCK *block, //block to search BOOL8 testing_on, //dbug mode tesseract::Tesseract* tess ); 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