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https://github.com/tesseract-ocr/tesseract.git
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425d593ebe
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk/trunk@2 d0cd1f9f-072b-0410-8dd7-cf729c803f20
278 lines
8.6 KiB
C++
278 lines
8.6 KiB
C++
/* -*-C-*-
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********************************************************************************
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*
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* File: wordclass.c (Formerly wordclass.c)
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* Description: Word classifier
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* Author: Mark Seaman, OCR Technology
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* Created: Tue Jan 30 14:03:25 1990
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* Modified: Fri Jul 12 16:03:06 1991 (Mark Seaman) marks@hpgrlt
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* Language: C
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* Package: N/A
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* Status: Experimental (Do Not Distribute)
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*
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* (c) Copyright 1990, Hewlett-Packard Company.
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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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/*----------------------------------------------------------------------
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I N C L U D E S
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----------------------------------------------------------------------*/
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#include <stdio.h>
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#ifdef __UNIX__
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#include <assert.h>
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#endif
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#include "wordclass.h"
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#include "fxid.h"
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#include "tordvars.h"
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#include "associate.h"
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#include "render.h"
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#include "metrics.h"
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#include "matchtab.h"
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//#include "tfacepp.h"
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#include "permute.h"
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#include "context.h"
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#include "badwords.h"
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#include "callcpp.h"
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extern TBLOB *newblob();
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/*----------------------------------------------------------------------
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Variables
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----------------------------------------------------------------------*/
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INT16 first_pass;
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/*----------------------------------------------------------------------
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C o n s t a n t s
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----------------------------------------------------------------------*/
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#define BOLD_ON "&dB(s3B"
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#define BOLD_OFF "&d@(s0B"
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#define UNDERLINE_ON "&dD"
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#define UNDERLINE_OFF "&d@"
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LIST call_matcher( //call a matcher
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TBLOB *ptblob, //previous
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TBLOB *tessblob, //blob to match
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TBLOB *ntblob, //next
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void *, //unused parameter
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TEXTROW * //always null anyway
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);
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/*----------------------------------------------------------------------
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F u n c t i o n s
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----------------------------------------------------------------------*/
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/**********************************************************************
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* classify_blob
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*
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* Classify the this blob if it is not already recorded in the match
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* table. Attempt to recognize this blob as a character. The recognition
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* rating (probability) for this blob will be stored as a part of the
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* blob. This value will also be returned to the caller.
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**********************************************************************/
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CHOICES classify_blob(TBLOB *pblob,
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TBLOB *blob,
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TBLOB *nblob,
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TEXTROW *row,
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int fx,
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const char *string,
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C_COL color,
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STATE *this_state,
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STATE *best_state,
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INT32 pass,
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INT32 blob_index) {
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CHOICES rating;
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INT32 old_index;
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chars_classified++; /* Global value */
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if (blob_skip)
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return (NIL);
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#ifndef GRAPHICS_DISABLED
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if (display_all_blobs)
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display_blob(blob, color);
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#endif
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rating = get_match (blob);
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if (rating == NIL) {
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if (pass) {
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old_index = blob_index;
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//?cast to int*
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blob_type = compare_states (best_state, this_state, (int *) &blob_index);
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blob_answer = word_answer[blob_index];
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if (blob_answer < '!')
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fprintf (matcher_fp,
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"Bad compare states: best state=0x%x%x, this=0x%x%x, bits="
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INT32FORMAT ", index=" INT32FORMAT ", outdex="
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INT32FORMAT ", word=%s\n", best_state->part1,
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best_state->part2, this_state->part1, this_state->part2,
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bits_in_states, old_index, blob_index, word_answer);
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}
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else
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blob_type = 0;
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rating = /*(*blob_matchers [fx]) */ (CHOICES) call_matcher (pblob, blob,
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nblob, NULL,
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row);
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put_match(blob, rating);
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}
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#ifndef GRAPHICS_DISABLED
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if (display_ratings && string)
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print_choices(string, rating);
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if (blob_pause)
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window_wait(blob_window);
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#endif
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return (rating);
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}
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/**********************************************************************
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* write_text_files
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*
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* Write an answer to the output file that is the raw guess (without
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* context) directly from the classifier.
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**********************************************************************/
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void write_text_files(TWERD *word,
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char *raw_choice,
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int same_row,
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int good_word,
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int firstpass) {
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int x;
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/* Raw output */
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if (write_raw_output) {
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if (same_row)
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fprintf (rawfile, "\n");
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if (raw_choice && strlen (raw_choice)) {
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fprintf (rawfile, "%s ", raw_choice);
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fflush(rawfile);
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}
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}
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/* Text file output */
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if (write_output) {
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if (same_row)
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fprintf (textfile, "\n");
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if (word->guess && strlen (word->guess)) {
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for (x = 0; x < word->blanks; x++)
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fprintf (textfile, " ");
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if (!firstpass)
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fprintf(textfile, BOLD_ON);
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if (!good_word)
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fprintf(textfile, UNDERLINE_ON);
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fprintf (textfile, "%s", word->guess);
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if (!good_word)
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fprintf(textfile, UNDERLINE_OFF);
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if (!firstpass)
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fprintf(textfile, BOLD_OFF);
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fflush(textfile);
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}
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}
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/* Global counters */
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character_count += (word->guess ? strlen (word->guess) : 0);
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word_count++;
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}
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/**********************************************************************
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* save_answer
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*
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* Write an answer to the output file that is the raw guess (without
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* context) directly from the classifier.
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**********************************************************************/
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void save_answer(TWERD *word,
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TEXTROW *row,
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A_CHOICE *best_choice,
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A_CHOICE *raw_choice,
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int firstpass) {
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static TEXTROW *last_row;
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char raw_answer[CHARS_PER_LINE];
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int answer_already;
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int good_answer;
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char *string = NULL;
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if (best_choice) {
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good_answer = AcceptableResult (best_choice, raw_choice);
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string = class_string (best_choice);
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}
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else {
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good_answer = FALSE;
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}
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if (firstpass) {
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/* First pass */
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if (string) {
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/* Got answer */
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add_document_word(best_choice);
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word->guess = string;
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fix_quotes (word->guess);
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strcpy (raw_answer, word->guess);
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record_certainty (class_certainty (best_choice), 1);
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if (good_answer) {
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record_certainty (class_certainty (best_choice), 2);
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strcat (raw_answer, " ");
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strcat (raw_answer, class_string (raw_choice));
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word->guess = strsave (raw_answer);
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word->guess[strlen (string)] = 0;
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if (string) {
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strfree(string);
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class_string (best_choice) = NULL;
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}
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}
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else {
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/* Not good enough */
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if (word->guess)
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strfree (word->guess);
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word->guess = NULL;
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}
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}
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else {
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word->guess = NULL;
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raw_answer[0] = '\0';
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}
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}
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else {
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/* Second pass */
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answer_already = (word->guess != NULL);
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if (answer_already) {
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write_text_files (word,
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&word->guess[strlen (word->guess) + 1],
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(row != last_row), TRUE, TRUE);
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}
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else {
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/* Required second pass */
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if (string) {
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if (!good_answer && tessedit_save_stats) {
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SaveBadWord (string, class_certainty (best_choice));
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}
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record_certainty (class_certainty (best_choice), 2);
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word->guess = class_string (best_choice);
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fix_quotes (word->guess);
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write_text_files (word, class_string (raw_choice),
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(row != last_row), good_answer, FALSE);
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}
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}
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}
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/* Word Display */
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if (display_text) {
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if (row != last_row)
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cprintf ("\n");
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if (word->guess && strlen (word->guess))
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cprintf ("%s ", word->guess);
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else
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cprintf ("%s ", raw_answer);
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fflush(stdout);
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}
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last_row = row;
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}
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