mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-27 20:59:36 +08:00
4c6c58e6ea
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@158 d0cd1f9f-072b-0410-8dd7-cf729c803f20
194 lines
8.6 KiB
C
194 lines
8.6 KiB
C
/**********************************************************************
|
|
* to_spacing
|
|
*
|
|
* Compute fuzzy word spacing thresholds for each row.
|
|
**********************************************************************/
|
|
|
|
#ifndef TOSPACE_H
|
|
#define TOSPACE_H
|
|
|
|
#include "blobbox.h"
|
|
#include "gap_map.h"
|
|
#include "statistc.h"
|
|
#include "notdll.h"
|
|
extern BOOL_VAR_H (tosp_old_to_method, FALSE, "Space stats use prechopping?");
|
|
extern BOOL_VAR_H (tosp_only_use_prop_rows, TRUE,
|
|
"Block stats to use fixed pitch rows?");
|
|
extern BOOL_VAR_H (tosp_use_pre_chopping, FALSE,
|
|
"Space stats use prechopping?");
|
|
extern BOOL_VAR_H (tosp_old_to_bug_fix, FALSE,
|
|
"Fix suspected bug in old code");
|
|
extern BOOL_VAR_H (tosp_block_use_cert_spaces, TRUE,
|
|
"Only stat OBVIOUS spaces");
|
|
extern BOOL_VAR_H (tosp_row_use_cert_spaces, TRUE,
|
|
"Only stat OBVIOUS spaces");
|
|
extern BOOL_VAR_H (tosp_narrow_blobs_not_cert, TRUE,
|
|
"Only stat OBVIOUS spaces");
|
|
extern BOOL_VAR_H (tosp_row_use_cert_spaces1, TRUE,
|
|
"Only stat OBVIOUS spaces");
|
|
extern BOOL_VAR_H (tosp_recovery_isolated_row_stats, TRUE,
|
|
"Use row alone when inadequate cert spaces");
|
|
extern BOOL_VAR_H (tosp_only_small_gaps_for_kern, FALSE, "Better guess");
|
|
extern BOOL_VAR_H (tosp_all_flips_fuzzy, FALSE, "Pass ANY flip to context?");
|
|
extern BOOL_VAR_H (tosp_fuzzy_limit_all, TRUE,
|
|
"Dont restrict kn->sp fuzzy limit to tables");
|
|
extern BOOL_VAR_H (tosp_stats_use_xht_gaps, TRUE,
|
|
"Use within xht gap for wd breaks");
|
|
extern BOOL_VAR_H (tosp_use_xht_gaps, TRUE,
|
|
"Use within xht gap for wd breaks");
|
|
extern BOOL_VAR_H (tosp_only_use_xht_gaps, FALSE,
|
|
"Only use within xht gap for wd breaks");
|
|
extern BOOL_VAR_H (tosp_rule_9_test_punct, FALSE,
|
|
"Dont chng kn to space next to punct");
|
|
extern BOOL_VAR_H (tosp_flip_fuzz_kn_to_sp, TRUE, "Default flip");
|
|
extern BOOL_VAR_H (tosp_flip_fuzz_sp_to_kn, TRUE, "Default flip");
|
|
extern BOOL_VAR_H (tosp_improve_thresh, FALSE,
|
|
"Enable improvement heuristic");
|
|
extern INT_VAR_H (tosp_debug_level, 0, "Debug data");
|
|
extern INT_VAR_H (tosp_enough_space_samples_for_median, 3,
|
|
"or should we use mean");
|
|
extern INT_VAR_H (tosp_redo_kern_limit, 10,
|
|
"No.samples reqd to reestimate for row");
|
|
extern INT_VAR_H (tosp_few_samples, 40,
|
|
"No.gaps reqd with 1 large gap to treat as a table");
|
|
extern INT_VAR_H (tosp_short_row, 20,
|
|
"No.gaps reqd with few cert spaces to use certs");
|
|
extern INT_VAR_H (tosp_sanity_method, 1, "How to avoid being silly");
|
|
extern double_VAR_H (tosp_threshold_bias1, 0,
|
|
"how far between kern and space?");
|
|
extern double_VAR_H (tosp_threshold_bias2, 0,
|
|
"how far between kern and space?");
|
|
extern double_VAR_H (tosp_narrow_fraction, 0.3,
|
|
"Fract of xheight for narrow");
|
|
extern double_VAR_H (tosp_narrow_aspect_ratio, 0.48,
|
|
"narrow if w/h less than this");
|
|
extern double_VAR_H (tosp_wide_fraction, 0.52, "Fract of xheight for wide");
|
|
extern double_VAR_H (tosp_wide_aspect_ratio, 0.0,
|
|
"wide if w/h less than this");
|
|
extern double_VAR_H (tosp_fuzzy_space_factor, 0.6,
|
|
"Fract of xheight for fuzz sp");
|
|
extern double_VAR_H (tosp_fuzzy_space_factor1, 0.5,
|
|
"Fract of xheight for fuzz sp");
|
|
extern double_VAR_H (tosp_fuzzy_space_factor2, 0.72,
|
|
"Fract of xheight for fuzz sp");
|
|
extern double_VAR_H (tosp_gap_factor, 0.83, "gap ratio to flip sp->kern");
|
|
extern double_VAR_H (tosp_kern_gap_factor1, 2.0,
|
|
"gap ratio to flip kern->sp");
|
|
extern double_VAR_H (tosp_kern_gap_factor2, 1.3,
|
|
"gap ratio to flip kern->sp");
|
|
extern double_VAR_H (tosp_kern_gap_factor3, 2.5,
|
|
"gap ratio to flip kern->sp");
|
|
extern double_VAR_H (tosp_ignore_big_gaps, -1, "xht multiplier");
|
|
extern double_VAR_H (tosp_ignore_very_big_gaps, 3.5, "xht multiplier");
|
|
extern double_VAR_H (tosp_rep_space, 1.6, "rep gap multiplier for space");
|
|
extern double_VAR_H (tosp_enough_small_gaps, 0.65,
|
|
"Fract of kerns reqd for isolated row stats");
|
|
extern double_VAR_H (tosp_table_kn_sp_ratio, 2.25,
|
|
"Min difference of kn & sp in table");
|
|
extern double_VAR_H (tosp_table_xht_sp_ratio, 0.33,
|
|
"Expect spaces bigger than this");
|
|
extern double_VAR_H (tosp_table_fuzzy_kn_sp_ratio, 3.0,
|
|
"Fuzzy if less than this");
|
|
extern double_VAR_H (tosp_fuzzy_kn_fraction, 0.5, "New fuzzy kn alg");
|
|
extern double_VAR_H (tosp_fuzzy_sp_fraction, 0.5, "New fuzzy sp alg");
|
|
extern double_VAR_H (tosp_min_sane_kn_sp, 1.5,
|
|
"Dont trust spaces less than this time kn");
|
|
extern double_VAR_H (tosp_init_guess_kn_mult, 2.2,
|
|
"Thresh guess - mult kn by this");
|
|
extern double_VAR_H (tosp_init_guess_xht_mult, 0.28,
|
|
"Thresh guess - mult xht by this");
|
|
extern double_VAR_H (tosp_max_sane_kn_thresh, 5.0,
|
|
"Multiplier on kn to limit thresh");
|
|
extern double_VAR_H (tosp_flip_caution, 0.0,
|
|
"Dont autoflip kn to sp when large separation");
|
|
extern double_VAR_H (tosp_large_kerning, 0.19,
|
|
"Limit use of xht gap with large kns");
|
|
extern double_VAR_H (tosp_dont_fool_with_small_kerns, -1,
|
|
"Limit use of xht gap with odd small kns");
|
|
extern double_VAR_H (tosp_near_lh_edge, 0,
|
|
"Dont reduce box if the top left is non blank");
|
|
extern double_VAR_H (tosp_silly_kn_sp_gap, 0.2,
|
|
"Dont let sp minus kn get too small");
|
|
extern double_VAR_H (tosp_pass_wide_fuzz_sp_to_context, 0.75,
|
|
"How wide fuzzies need context");
|
|
void to_spacing( //set spacing
|
|
ICOORD page_tr, //topright of page
|
|
TO_BLOCK_LIST *blocks //blocks on page
|
|
);
|
|
//DEBUG USE ONLY
|
|
void block_spacing_stats(TO_BLOCK *block,
|
|
GAPMAP *gapmap,
|
|
BOOL8 &old_text_ord_proportional,
|
|
inT16 &block_space_gap_width, //resulting estimate
|
|
inT16 &block_non_space_gap_width //resulting estimate
|
|
);
|
|
//estimate for block
|
|
void row_spacing_stats(TO_ROW *row,
|
|
GAPMAP *gapmap,
|
|
inT16 block_idx,
|
|
inT16 row_idx,
|
|
inT16 block_space_gap_width,
|
|
inT16 block_non_space_gap_width //estimate for block
|
|
);
|
|
//estimate for block
|
|
void old_to_method(TO_ROW *row,
|
|
STATS *all_gap_stats,
|
|
STATS *space_gap_stats,
|
|
STATS *small_gap_stats,
|
|
inT16 block_space_gap_width,
|
|
inT16 block_non_space_gap_width //estimate for block
|
|
);
|
|
BOOL8 isolated_row_stats(TO_ROW *row,
|
|
GAPMAP *gapmap,
|
|
STATS *all_gap_stats,
|
|
BOOL8 suspected_table,
|
|
inT16 block_idx,
|
|
inT16 row_idx);
|
|
inT16 stats_count_under(STATS *stats, inT16 threshold);
|
|
void improve_row_threshold(TO_ROW *row, STATS *all_gap_stats);
|
|
ROW *make_prop_words( //find lines
|
|
TO_ROW *row, //row to make
|
|
FCOORD rotation //for drawing
|
|
);
|
|
BOOL8 make_a_word_break( //decide on word break
|
|
TO_ROW *row, //row being made
|
|
TBOX blob_box, //for next_blob //how many blanks?
|
|
inT16 prev_gap,
|
|
TBOX prev_blob_box,
|
|
inT16 real_current_gap,
|
|
inT16 within_xht_current_gap,
|
|
TBOX next_blob_box,
|
|
inT16 next_gap,
|
|
uinT8 &blanks,
|
|
BOOL8 &fuzzy_sp,
|
|
BOOL8 &fuzzy_non);
|
|
BOOL8 narrow_blob(TO_ROW *row, TBOX blob_box);
|
|
BOOL8 wide_blob(TO_ROW *row, TBOX blob_box);
|
|
BOOL8 suspected_punct_blob(TO_ROW *row, TBOX box);
|
|
//A COPY FOR PEEKING
|
|
void peek_at_next_gap(TO_ROW *row,
|
|
BLOBNBOX_IT box_it,
|
|
TBOX &next_blob_box,
|
|
inT16 &next_gap,
|
|
inT16 &next_within_xht_gap);
|
|
void mark_gap( //Debug stuff
|
|
TBOX blob, //blob following gap
|
|
inT16 rule, // heuristic id
|
|
inT16 prev_gap,
|
|
inT16 prev_blob_width,
|
|
inT16 current_gap,
|
|
inT16 next_blob_width,
|
|
inT16 next_gap);
|
|
float find_mean_blob_spacing(WERD *word);
|
|
BOOL8 ignore_big_gap(TO_ROW *row,
|
|
inT32 row_length,
|
|
GAPMAP *gapmap,
|
|
inT16 left,
|
|
inT16 right);
|
|
TBOX reduced_box_next( //get bounding box
|
|
TO_ROW *row, //current row
|
|
BLOBNBOX_IT *it //iterator to blobds
|
|
);
|
|
TBOX reduced_box_for_blob(BLOBNBOX *blob, TO_ROW *row, inT16 *left_above_xht);
|
|
#endif
|