mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-24 07:27:49 +08:00
196 lines
9.8 KiB
C
196 lines
9.8 KiB
C
|
/**********************************************************************
|
||
|
|
* 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"
|
||
|
|
|
||
|
|
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");
|
||
|
|
extern double_VAR_H (textord_repch_width_variance, 0.2,
|
||
|
|
"Max width change of gap/blob");
|
||
|
|
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
|
||
|
|
);
|
||
|
|
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
|
||
|
|
);
|
||
|
|
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
|
||
|
|
);
|
||
|
|
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
|