/********************************************************************** * File: tordmain.cpp (Formerly textordp.c) * Description: C++ top level textord code. * Author: Ray Smith * Created: Tue Jul 28 17:12:33 BST 1992 * * (C) Copyright 1992, 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. * **********************************************************************/ #include "mfcpch.h" #ifdef __UNIX__ #include #endif #include "stderr.h" #include "globaloc.h" #include "tessout.h" #include "blread.h" #include "blobbox.h" //#include "lmedsq.h" #include "edgblob.h" //#include "adthsh.h" #include "drawtord.h" #include "makerow.h" #include "wordseg.h" #include "ocrclass.h" #include "genblob.h" #include "imgs.h" //#include "bairdskw.h" #include "tordmain.h" #include "secname.h" const ERRCODE BLOCKLESS_BLOBS = "Warning:some blobs assigned to no block"; #ifdef GRAPHICS_DISABLED ETEXT_DESC *global_monitor = NULL; #endif #define EXTERN EXTERN BOOL_VAR (textord_show_blobs, FALSE, "Display unsorted blobs"); EXTERN BOOL_VAR (textord_show_boxes, FALSE, "Display unsorted blobs"); EXTERN BOOL_VAR (textord_new_initial_xheight, TRUE, "Use test xheight mechanism"); EXTERN BOOL_VAR (textord_exit_after, FALSE, "Exit after completing textord"); EXTERN INT_VAR (textord_max_noise_size, 7, "Pixel size of noise"); EXTERN double_VAR (textord_blob_size_bigile, 95, "Percentile for large blobs"); EXTERN double_VAR (textord_noise_area_ratio, 0.7, "Fraction of bounding box for noise"); EXTERN double_VAR (textord_blob_size_smallile, 20, "Percentile for small blobs"); EXTERN double_VAR (textord_initialx_ile, 0.75, "Ile of sizes for xheight guess"); EXTERN double_VAR (textord_initialasc_ile, 0.90, "Ile of sizes for xheight guess"); EXTERN INT_VAR (textord_noise_sizefraction, 10, "Fraction of size for maxima"); EXTERN double_VAR (textord_noise_sizelimit, 0.5, "Fraction of x for big t count"); EXTERN INT_VAR (textord_noise_translimit, 16, "Transitions for normal blob"); EXTERN double_VAR (textord_noise_normratio, 2.0, "Dot to norm ratio for deletion"); EXTERN BOOL_VAR (textord_noise_rejwords, TRUE, "Reject noise-like words"); EXTERN BOOL_VAR (textord_noise_rejrows, TRUE, "Reject noise-like rows"); EXTERN double_VAR (textord_noise_syfract, 0.2, "xh fract error for norm blobs"); EXTERN double_VAR (textord_noise_sxfract, 0.4, "xh fract width error for norm blobs"); EXTERN INT_VAR (textord_noise_sncount, 1, "super norm blobs to save row"); EXTERN double_VAR (textord_noise_rowratio, 6.0, "Dot to norm ratio for deletion"); EXTERN BOOL_VAR (textord_noise_debug, FALSE, "Debug row garbage detector"); EXTERN double_VAR (textord_blshift_maxshift, 0.00, "Max baseline shift"); EXTERN double_VAR (textord_blshift_xfraction, 9.99, "Min size of baseline shift"); EXTERN STRING_EVAR (tessedit_image_ext, ".tif", "Externsion for image file"); #ifndef EMBEDDED EXTERN clock_t previous_cpu; #endif extern BOOL_VAR_H (polygon_tess_approximation, TRUE, "Do tess poly instead of grey scale"); #define MAX_NEAREST_DIST 600 //for block skew stats #define MAX_BLOB_TRANSITIONS100 //for nois stats extern IMAGE page_image; //must be defined somewhere extern BOOL_VAR_H (interactive_mode, TRUE, "Run interactively?"); extern /*"C" */ ETEXT_DESC *global_monitor; //progress monitor /********************************************************************** * read_and_textord * * Read a file of blocks n blobs and textord them. **********************************************************************/ void read_and_textord( //read .pb file const char *filename, //.pb file BLOCK_LIST *blocks) { int c; //input character FILE *infp; //input file BLOCK *block; //current block BOX page_box; //bounding_box BLOCK_IT block_it = blocks; //iterator //different orientations TO_BLOCK_LIST land_blocks, port_blocks; infp = fopen (filename, "r"); if (infp == NULL) CANTOPENFILE.error ("read_and_textord", EXIT, filename); while (((c = fgetc (infp)) != EOF) && (ungetc (c, infp) != EOF)) { //get one block = BLOCK::de_serialise (infp); //add to list block_it.add_after_then_move (block); //find page size page_box += block->bounding_box (); } fclose(infp); assign_blobs_to_blocks2(blocks, &land_blocks, &port_blocks); filter_blobs (page_box.topright (), &port_blocks, !textord_test_landscape); filter_blobs (page_box.topright (), &land_blocks, textord_test_landscape); textord_page (page_box.topright (), blocks, &land_blocks, &port_blocks); } /********************************************************************** * edges_and_textord * * Read a file of blocks n blobs and textord them. **********************************************************************/ void edges_and_textord( //read .pb file const char *filename, //.pb file BLOCK_LIST *blocks) { BLOCK *block; //current block char *lastdot; //of name STRING name = filename; //truncated name ICOORD page_tr; BOX page_box; //bounding_box PDBLK_CLIST pd_blocks; //copy of list BLOCK_IT block_it = blocks; //iterator PDBLK_C_IT pd_it = &pd_blocks; //iterator //different orientations TO_BLOCK_LIST land_blocks, port_blocks; IMAGE thresh_image; //thresholded lastdot = strrchr (name.string (), '.'); if (lastdot != NULL) *lastdot = '\0'; if (page_image.get_bpp () == 0) { name += tessedit_image_ext; if (page_image.read_header (name.string ())) CANTOPENFILE.error ("edges_and_textord", EXIT, name.string ()); if (page_image.read (0)) READFAILED.error ("edges_and_textord", EXIT, name.string ()); name = filename; lastdot = strrchr (name.string (), '.'); if (lastdot != NULL) *lastdot = '\0'; } page_tr = ICOORD (page_image.get_xsize (), page_image.get_ysize ()); read_pd_file (name, page_image.get_xsize (), page_image.get_ysize (), blocks); block_it.set_to_list (blocks); if (global_monitor != NULL) global_monitor->ocr_alive = TRUE; if (page_image.get_bpp () > 1) { set_global_loc_code(LOC_ADAPTIVE); for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { block = block_it.data (); pd_it.add_after_then_move (block); } // adaptive_threshold(&page_image,&pd_blocks,&thresh_image); set_global_loc_code(LOC_EDGE_PROG); #ifndef EMBEDDED previous_cpu = clock (); #endif for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { block = block_it.data (); if (!polygon_tess_approximation) invert_image(&page_image); #ifndef GRAPHICS_DISABLED extract_edges(NO_WINDOW, &page_image, &thresh_image, page_tr, block); #else extract_edges(&page_image, &thresh_image, page_tr, block); #endif page_box += block->bounding_box (); } page_image = thresh_image; //everyone else gets it } else { set_global_loc_code(LOC_EDGE_PROG); if (!page_image.white_high ()) invert_image(&page_image); #ifndef EMBEDDED previous_cpu = clock (); #endif for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { block = block_it.data (); #ifndef GRAPHICS_DISABLED extract_edges(NO_WINDOW, &page_image, &page_image, page_tr, block); #else extract_edges(&page_image, &page_image, page_tr, block); #endif page_box += block->bounding_box (); } } if (global_monitor != NULL) { global_monitor->ocr_alive = TRUE; global_monitor->progress = 10; } assign_blobs_to_blocks2(blocks, &land_blocks, &port_blocks); if (global_monitor != NULL) global_monitor->ocr_alive = TRUE; filter_blobs (page_box.topright (), &land_blocks, textord_test_landscape); #ifndef EMBEDDED previous_cpu = clock (); #endif filter_blobs (page_box.topright (), &port_blocks, !textord_test_landscape); if (global_monitor != NULL) global_monitor->ocr_alive = TRUE; textord_page (page_box.topright (), blocks, &land_blocks, &port_blocks); } /********************************************************************** * assign_blobs_to_blocks2 * * Make a list of TO_BLOCKs for portrait and landscape orientation. **********************************************************************/ void assign_blobs_to_blocks2( //split into groups BLOCK_LIST *blocks, //blocks to process TO_BLOCK_LIST *land_blocks, //rotated for landscape TO_BLOCK_LIST *port_blocks //output list ) { BLOCK *block; //current block BLOBNBOX *newblob; //created blob C_BLOB *blob; //current blob BLOCK_IT block_it = blocks; C_BLOB_IT blob_it; //iterator BLOBNBOX_IT port_box_it; //iterator //destination iterator TO_BLOCK_IT port_block_it = port_blocks; TO_BLOCK *port_block; //created block for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { block = block_it.data (); blob_it.set_to_list (block->blob_list ()); //make one port_block = new TO_BLOCK (block); //make one port_box_it.set_to_list (&port_block->blobs); for (blob_it.mark_cycle_pt (); !blob_it.cycled_list (); blob_it.forward ()) { blob = blob_it.extract (); //convert blob newblob = new BLOBNBOX (blob); //add to list port_box_it.add_after_then_move (newblob); //convert blob } port_block_it.add_after_then_move (port_block); } } /********************************************************************** * filter_blobs * * Sort the blobs into sizes in all the blocks for later work. **********************************************************************/ void filter_blobs( //split into groups ICOORD page_tr, //top right TO_BLOCK_LIST *blocks, //output list BOOL8 testing_on //for plotting ) { TO_BLOCK_IT block_it = blocks; //destination iterator TO_BLOCK *block; //created block for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { block = block_it.data (); block->line_size = filter_noise_blobs (&block->blobs, &block->noise_blobs, &block->small_blobs, &block->large_blobs); block->line_spacing = block->line_size * (textord_merge_desc + textord_merge_x + textord_merge_asc + textord_merge_asc) / textord_merge_x; block->line_size *= textord_min_linesize; block->max_blob_size = block->line_size * textord_excess_blobsize; #ifndef GRAPHICS_DISABLED if (textord_show_blobs && testing_on) { if (to_win == NO_WINDOW) create_to_win(page_tr); plot_blob_list (to_win, &block->noise_blobs, CORAL, BLUE); plot_blob_list (to_win, &block->small_blobs, GOLDENROD, YELLOW); plot_blob_list (to_win, &block->large_blobs, DARK_GREEN, YELLOW); plot_blob_list (to_win, &block->blobs, WHITE, BROWN); } if (textord_show_boxes && testing_on) { if (to_win == NO_WINDOW) create_to_win(page_tr); plot_box_list (to_win, &block->noise_blobs, WHITE); plot_box_list (to_win, &block->small_blobs, WHITE); plot_box_list (to_win, &block->large_blobs, WHITE); plot_box_list (to_win, &block->blobs, WHITE); } #endif } } /********************************************************************** * filter_noise_blobs * * Move small blobs to a separate list. **********************************************************************/ float filter_noise_blobs( //separate noise BLOBNBOX_LIST *src_list, //origonal list BLOBNBOX_LIST *noise_list, //noise list BLOBNBOX_LIST *small_list, //small blobs BLOBNBOX_LIST *large_list //large blobs ) { INT16 height; //height of blob INT16 width; //of blob BLOBNBOX_IT src_it = src_list; //iterators BLOBNBOX_IT noise_it = noise_list; BLOBNBOX_IT small_it = small_list; BLOBNBOX_IT large_it = large_list; STATS size_stats (0, MAX_NEAREST_DIST); //blob heights if (textord_new_initial_xheight) return filter_noise_blobs2 (src_list, noise_list, small_list, large_list); float min_y; //size limits float max_y; float max_x; for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { if (src_it.data ()->bounding_box ().height () < textord_max_noise_size) noise_it.add_after_then_move (src_it.extract ()); } for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { size_stats.add (src_it.data ()->bounding_box ().height (), 1); } min_y = floor (size_stats.ile (textord_blob_size_smallile / 100.0)); max_y = ceil (size_stats.ile (textord_blob_size_bigile / 100.0)); max_x = ceil (size_stats.ile (0.5) * textord_width_limit); for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { height = src_it.data ()->bounding_box ().height (); width = src_it.data ()->bounding_box ().width (); if (height < min_y) small_it.add_after_then_move (src_it.extract ()); else if (height > max_y || width > max_x) large_it.add_after_then_move (src_it.extract ()); } return size_stats.ile (textord_initialx_ile); } /********************************************************************** * filter_noise_blobs2 * * Move small blobs to a separate list. **********************************************************************/ float filter_noise_blobs2( //separate noise BLOBNBOX_LIST *src_list, //origonal list BLOBNBOX_LIST *noise_list, //noise list BLOBNBOX_LIST *small_list, //small blobs BLOBNBOX_LIST *large_list //large blobs ) { INT16 height; //height of blob INT16 width; //of blob BLOBNBOX *blob; //current blob float initial_x; //first guess BLOBNBOX_IT src_it = src_list; //iterators BLOBNBOX_IT noise_it = noise_list; BLOBNBOX_IT small_it = small_list; BLOBNBOX_IT large_it = large_list; STATS size_stats (0, MAX_NEAREST_DIST); //blob heights float min_y; //size limits float max_y; float max_x; float max_height; //of good blobs for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { blob = src_it.data (); if (blob->bounding_box ().height () < textord_max_noise_size) noise_it.add_after_then_move (src_it.extract ()); else if (blob->enclosed_area () >= blob->bounding_box ().height () * blob->bounding_box ().width () * textord_noise_area_ratio) small_it.add_after_then_move (src_it.extract ()); } for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { size_stats.add (src_it.data ()->bounding_box ().height (), 1); } initial_x = size_stats.ile (textord_initialx_ile); max_y = ceil (initial_x * (textord_merge_desc + textord_merge_x + 2 * textord_merge_asc) / textord_merge_x); min_y = floor (initial_x / 2); max_x = ceil (initial_x * textord_width_limit); small_it.move_to_first (); for (small_it.mark_cycle_pt (); !small_it.cycled_list (); small_it.forward ()) { height = small_it.data ()->bounding_box ().height (); if (height >= min_y) large_it.add_after_then_move (small_it.extract ()); } size_stats.clear (); for (src_it.mark_cycle_pt (); !src_it.cycled_list (); src_it.forward ()) { height = src_it.data ()->bounding_box ().height (); width = src_it.data ()->bounding_box ().width (); if (height < min_y) small_it.add_after_then_move (src_it.extract ()); else if (height > max_y || width > max_x) large_it.add_after_then_move (src_it.extract ()); else size_stats.add (height, 1); } max_height = size_stats.ile (textord_initialasc_ile); // printf("max_y=%g, min_y=%g, initial_x=%g, max_height=%g,", // max_y,min_y,initial_x,max_height); max_height *= textord_merge_x / (textord_merge_x + textord_merge_asc); if (max_height > initial_x) initial_x = max_height; // printf(" ret=%g\n",initial_x); return initial_x; } /********************************************************************** * textord_page * * Textord the list of blobs and return a list of proper blocks. **********************************************************************/ void textord_page( //make rows & words ICOORD page_tr, //top right BLOCK_LIST *blocks, //block list TO_BLOCK_LIST *land_blocks, //rotated for landscape TO_BLOCK_LIST *port_blocks //output list ) { float gradient; //global skew set_global_loc_code(LOC_TEXT_ORD_ROWS); gradient = make_rows (page_tr, blocks, land_blocks, port_blocks); if (global_monitor != NULL) { global_monitor->ocr_alive = TRUE; global_monitor->progress = 20; } set_global_loc_code(LOC_TEXT_ORD_WORDS); make_words(page_tr, gradient, blocks, land_blocks, port_blocks); if (global_monitor != NULL) { global_monitor->ocr_alive = TRUE; global_monitor->progress = 30; } cleanup_blocks(blocks); //remove empties #ifndef GRAPHICS_DISABLED close_to_win(); #endif if (textord_exit_after && !interactive_mode) exit (0); } /********************************************************************** * cleanup_blocks * * Delete empty blocks, rows from the page. **********************************************************************/ void cleanup_blocks( //remove empties BLOCK_LIST *blocks //list ) { BLOCK_IT block_it = blocks; //iterator ROW_IT row_it; //row iterator for (block_it.mark_cycle_pt (); !block_it.cycled_list (); block_it.forward ()) { row_it.set_to_list (block_it.data ()->row_list ()); for (row_it.mark_cycle_pt (); !row_it.cycled_list (); row_it.forward ()) { if (textord_noise_rejrows && !row_it.data ()->word_list ()->empty () && clean_noise_from_row (row_it.data ()) || row_it.data ()->word_list ()->empty ()) delete row_it.extract ();//lose empty row else { if (textord_noise_rejwords) clean_noise_from_words (row_it.data ()); if (textord_blshift_maxshift >= 0) tweak_row_baseline (row_it.data ()); } } if (block_it.data ()->row_list ()->empty ()) { delete block_it.extract ();//lose empty block } } } /********************************************************************** * clean_noise_from_row * * Move blobs of words from rows of garbage into the reject blobs list. **********************************************************************/ BOOL8 clean_noise_from_row( //remove empties ROW *row //row to clean ) { BOOL8 testing_on; BOX blob_box; //bounding box C_BLOB *blob; //current blob C_OUTLINE *outline; //current outline WERD *word; //current word INT32 blob_size; //biggest size INT32 trans_count = 0; //no of transitions INT32 trans_threshold; //noise tolerance INT32 dot_count; //small objects INT32 norm_count; //normal objects INT32 super_norm_count; //real char-like //words of row WERD_IT word_it = row->word_list (); C_BLOB_IT blob_it; //blob iterator C_OUTLINE_IT out_it; //outline iterator if (textord_test_y > row->base_line (textord_test_x) && textord_show_blobs && textord_test_y < row->base_line (textord_test_x) + row->x_height ()) testing_on = TRUE; else testing_on = FALSE; dot_count = 0; norm_count = 0; super_norm_count = 0; for (word_it.mark_cycle_pt (); !word_it.cycled_list (); word_it.forward ()) { word = word_it.data (); //current word //blobs in word blob_it.set_to_list (word->cblob_list ()); for (blob_it.mark_cycle_pt (); !blob_it.cycled_list (); blob_it.forward ()) { blob = blob_it.data (); if (!word->flag (W_DONT_CHOP)) { //get outlines out_it.set_to_list (blob->out_list ()); for (out_it.mark_cycle_pt (); !out_it.cycled_list (); out_it.forward ()) { outline = out_it.data (); blob_box = outline->bounding_box (); blob_size = blob_box.width () > blob_box.height ()? blob_box.width () : blob_box. height(); if (blob_size < textord_noise_sizelimit * row->x_height ()) dot_count++; //count smal outlines if (!outline->child ()->empty () && blob_box.height () < (1 + textord_noise_syfract) * row->x_height () && blob_box.height () > (1 - textord_noise_syfract) * row->x_height () && blob_box.width () < (1 + textord_noise_sxfract) * row->x_height () && blob_box.width () > (1 - textord_noise_sxfract) * row->x_height ()) super_norm_count++; //count smal outlines } } else super_norm_count++; blob_box = blob->bounding_box (); blob_size = blob_box.width () > blob_box.height ()? blob_box.width () : blob_box.height (); if (blob_size >= textord_noise_sizelimit * row->x_height () && blob_size < row->x_height () * 2) { trans_threshold = blob_size / textord_noise_sizefraction; trans_count = blob->count_transitions (trans_threshold); if (trans_count < textord_noise_translimit) norm_count++; } else if (blob_box.height () > row->x_height () * 2 && (!word_it.at_first () || !blob_it.at_first ())) dot_count += 2; #ifndef SECURE_NAMES if (testing_on) { tprintf ("Blob at (%d,%d) -> (%d,%d), ols=%d, tc=%d, bldiff=%g\n", blob_box.left (), blob_box.bottom (), blob_box.right (), blob_box.top (), blob->out_list ()->length (), trans_count, blob_box.bottom () - row->base_line (blob_box.left ())); } #endif } } #ifndef SECURE_NAMES if (textord_noise_debug) { tprintf ("Row ending at (%d,%g):", blob_box.right (), row->base_line (blob_box.right ())); tprintf (" R=%g, dc=%d, nc=%d, %s\n", norm_count > 0 ? (float) dot_count / norm_count : 9999, dot_count, norm_count, dot_count > norm_count * textord_noise_normratio && dot_count > 2 ? "REJECTED" : "ACCEPTED"); } #endif return super_norm_count < textord_noise_sncount && dot_count > norm_count * textord_noise_rowratio && dot_count > 2; } /********************************************************************** * clean_noise_from_words * * Move blobs of words from rows of garbage into the reject blobs list. **********************************************************************/ void clean_noise_from_words( //remove empties ROW *row //row to clean ) { BOX blob_box; //bounding box INT8 *word_dud; //was it chucked C_BLOB *blob; //current blob C_OUTLINE *outline; //current outline WERD *word; //current word INT32 blob_size; //biggest size INT32 trans_count; //no of transitions INT32 trans_threshold; //noise tolerance INT32 dot_count; //small objects INT32 norm_count; //normal objects INT32 dud_words; //number discarded INT32 ok_words; //number remaining INT32 word_index; //current word //words of row WERD_IT word_it = row->word_list (); C_BLOB_IT blob_it; //blob iterator C_OUTLINE_IT out_it; //outline iterator ok_words = word_it.length (); if (ok_words == 0) return; word_dud = (INT8 *) alloc_mem (ok_words * sizeof (INT8)); dud_words = 0; ok_words = 0; word_index = 0; for (word_it.mark_cycle_pt (); !word_it.cycled_list (); word_it.forward ()) { word = word_it.data (); //current word dot_count = 0; norm_count = 0; //blobs in word blob_it.set_to_list (word->cblob_list ()); for (blob_it.mark_cycle_pt (); !blob_it.cycled_list (); blob_it.forward ()) { blob = blob_it.data (); if (!word->flag (W_DONT_CHOP)) { //get outlines out_it.set_to_list (blob->out_list ()); for (out_it.mark_cycle_pt (); !out_it.cycled_list (); out_it.forward ()) { outline = out_it.data (); blob_box = outline->bounding_box (); blob_size = blob_box.width () > blob_box.height ()? blob_box.width () : blob_box. height(); if (blob_size < textord_noise_sizelimit * row->x_height ()) dot_count++; //count smal outlines if (!outline->child ()->empty () && blob_box.height () < (1 + textord_noise_syfract) * row->x_height () && blob_box.height () > (1 - textord_noise_syfract) * row->x_height () && blob_box.width () < (1 + textord_noise_sxfract) * row->x_height () && blob_box.width () > (1 - textord_noise_sxfract) * row->x_height ()) norm_count++; //count smal outlines } } else norm_count++; blob_box = blob->bounding_box (); blob_size = blob_box.width () > blob_box.height ()? blob_box.width () : blob_box.height (); if (blob_size >= textord_noise_sizelimit * row->x_height () && blob_size < row->x_height () * 2) { trans_threshold = blob_size / textord_noise_sizefraction; trans_count = blob->count_transitions (trans_threshold); if (trans_count < textord_noise_translimit) norm_count++; } else if (blob_box.height () > row->x_height () * 2 && (!word_it.at_first () || !blob_it.at_first ())) dot_count += 2; } if (dot_count > 2) { if (dot_count > norm_count * textord_noise_normratio * 2) word_dud[word_index] = 2; else if (dot_count > norm_count * textord_noise_normratio) word_dud[word_index] = 1; else word_dud[word_index] = 0; } else word_dud[word_index] = 0; if (word_dud[word_index] == 2) dud_words++; else ok_words++; word_index++; } word_index = 0; for (word_it.mark_cycle_pt (); !word_it.cycled_list (); word_it.forward ()) { if (word_dud[word_index] == 2 || word_dud[word_index] == 1 && dud_words > ok_words) { word = word_it.data (); //current word //rejected blobs blob_it.set_to_list (word->rej_cblob_list ()); //move from blobs blob_it.add_list_after (word->cblob_list ()); } word_index++; } free_mem(word_dud); } /********************************************************************** * tweak_row_baseline * * Shift baseline to fit the blobs more accurately where they are * close enough. **********************************************************************/ void tweak_row_baseline( //remove empties ROW *row //row to clean ) { BOX blob_box; //bounding box C_BLOB *blob; //current blob WERD *word; //current word INT32 blob_count; //no of blobs INT32 src_index; //source segment INT32 dest_index; //destination segment INT32 *xstarts; //spline segments double *coeffs; //spline coeffs float ydiff; //baseline error float x_centre; //centre of blob //words of row WERD_IT word_it = row->word_list (); C_BLOB_IT blob_it; //blob iterator blob_count = 0; for (word_it.mark_cycle_pt (); !word_it.cycled_list (); word_it.forward ()) { word = word_it.data (); //current word //get total blobs blob_count += word->cblob_list ()->length (); } if (blob_count == 0) return; xstarts = (INT32 *) alloc_mem ((blob_count + row->baseline.segments + 1) * sizeof (INT32)); coeffs = (double *) alloc_mem ((blob_count + row->baseline.segments) * 3 * sizeof (double)); src_index = 0; dest_index = 0; xstarts[0] = row->baseline.xcoords[0]; for (word_it.mark_cycle_pt (); !word_it.cycled_list (); word_it.forward ()) { word = word_it.data (); //current word //blobs in word blob_it.set_to_list (word->cblob_list ()); for (blob_it.mark_cycle_pt (); !blob_it.cycled_list (); blob_it.forward ()) { blob = blob_it.data (); blob_box = blob->bounding_box (); x_centre = (blob_box.left () + blob_box.right ()) / 2.0; ydiff = blob_box.bottom () - row->base_line (x_centre); if (ydiff < 0) ydiff = -ydiff / row->x_height (); else ydiff = ydiff / row->x_height (); if (ydiff < textord_blshift_maxshift && blob_box.height () / row->x_height () > textord_blshift_xfraction) { if (xstarts[dest_index] >= x_centre) xstarts[dest_index] = blob_box.left (); coeffs[dest_index * 3] = 0; coeffs[dest_index * 3 + 1] = 0; coeffs[dest_index * 3 + 2] = blob_box.bottom (); //shift it dest_index++; xstarts[dest_index] = blob_box.right () + 1; } else { if (xstarts[dest_index] <= x_centre) { while (row->baseline.xcoords[src_index + 1] <= x_centre && src_index < row->baseline.segments - 1) { if (row->baseline.xcoords[src_index + 1] > xstarts[dest_index]) { coeffs[dest_index * 3] = row->baseline.quadratics[src_index].a; coeffs[dest_index * 3 + 1] = row->baseline.quadratics[src_index].b; coeffs[dest_index * 3 + 2] = row->baseline.quadratics[src_index].c; dest_index++; xstarts[dest_index] = row->baseline.xcoords[src_index + 1]; } src_index++; } coeffs[dest_index * 3] = row->baseline.quadratics[src_index].a; coeffs[dest_index * 3 + 1] = row->baseline.quadratics[src_index].b; coeffs[dest_index * 3 + 2] = row->baseline.quadratics[src_index].c; dest_index++; xstarts[dest_index] = row->baseline.xcoords[src_index + 1]; } } } } while (src_index < row->baseline.segments && row->baseline.xcoords[src_index + 1] <= xstarts[dest_index]) src_index++; while (src_index < row->baseline.segments) { coeffs[dest_index * 3] = row->baseline.quadratics[src_index].a; coeffs[dest_index * 3 + 1] = row->baseline.quadratics[src_index].b; coeffs[dest_index * 3 + 2] = row->baseline.quadratics[src_index].c; dest_index++; src_index++; xstarts[dest_index] = row->baseline.xcoords[src_index]; } //turn to spline row->baseline = QSPLINE (dest_index, xstarts, coeffs); free_mem(xstarts); free_mem(coeffs); } /********************************************************************** * blob_y_order * * Sort function to sort blobs in y from page top. **********************************************************************/ INT32 blob_y_order( //sort function void *item1, //items to compare void *item2) { //converted ptr BLOBNBOX *blob1 = *(BLOBNBOX **) item1; //converted ptr BLOBNBOX *blob2 = *(BLOBNBOX **) item2; if (blob1->bounding_box ().bottom () > blob2->bounding_box ().bottom ()) return -1; else if (blob1->bounding_box ().bottom () < blob2->bounding_box ().bottom ()) return 1; else { if (blob1->bounding_box ().left () < blob2->bounding_box ().left ()) return -1; else if (blob1->bounding_box ().left () > blob2->bounding_box ().left ()) return 1; else return 0; } }