mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-05 10:49:01 +08:00
82b1b201fc
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@568 d0cd1f9f-072b-0410-8dd7-cf729c803f20
434 lines
16 KiB
C++
434 lines
16 KiB
C++
/**********************************************************************
|
|
* File: pageres.h (Formerly page_res.h)
|
|
* Description: Results classes used by control.c
|
|
* Author: Phil Cheatle
|
|
* Created: Tue Sep 22 08:42:49 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.
|
|
*
|
|
**********************************************************************/
|
|
#ifndef PAGERES_H
|
|
#define PAGERES_H
|
|
|
|
#include "blobs.h"
|
|
#include "boxword.h"
|
|
#include "elst.h"
|
|
#include "genericvector.h"
|
|
#include "normalis.h"
|
|
#include "ocrblock.h"
|
|
#include "ocrrow.h"
|
|
#include "ratngs.h"
|
|
#include "rejctmap.h"
|
|
#include "seam.h"
|
|
#include "werd.h"
|
|
|
|
/* Forward declarations */
|
|
|
|
class BLOCK_RES;
|
|
|
|
ELISTIZEH (BLOCK_RES) CLISTIZEH (BLOCK_RES)
|
|
class
|
|
ROW_RES;
|
|
|
|
ELISTIZEH (ROW_RES)
|
|
class WERD_RES;
|
|
|
|
ELISTIZEH (WERD_RES)
|
|
|
|
/*************************************************************************
|
|
* PAGE_RES - Page results
|
|
*************************************************************************/
|
|
class PAGE_RES { // page result
|
|
public:
|
|
inT32 char_count;
|
|
inT32 rej_count;
|
|
BLOCK_RES_LIST block_res_list;
|
|
BOOL8 rejected;
|
|
// Updated every time PAGE_RES_IT iterating on this PAGE_RES moves to
|
|
// the next word. This pointer is not owned by PAGE_RES class.
|
|
WERD_CHOICE **prev_word_best_choice;
|
|
|
|
PAGE_RES() {
|
|
} // empty constructor
|
|
|
|
PAGE_RES(BLOCK_LIST *block_list, // real blocks
|
|
WERD_CHOICE **prev_word_best_choice_ptr);
|
|
|
|
~PAGE_RES () { // destructor
|
|
}
|
|
};
|
|
|
|
/*************************************************************************
|
|
* BLOCK_RES - Block results
|
|
*************************************************************************/
|
|
|
|
class BLOCK_RES:public ELIST_LINK {
|
|
public:
|
|
BLOCK * block; // real block
|
|
inT32 char_count; // chars in block
|
|
inT32 rej_count; // rejected chars
|
|
inT16 font_class; //
|
|
inT16 row_count;
|
|
float x_height;
|
|
BOOL8 font_assigned; // block already
|
|
// processed
|
|
BOOL8 bold; // all bold
|
|
BOOL8 italic; // all italic
|
|
|
|
ROW_RES_LIST row_res_list;
|
|
|
|
BLOCK_RES() {
|
|
} // empty constructor
|
|
|
|
BLOCK_RES(BLOCK *the_block); // real block
|
|
|
|
~BLOCK_RES () { // destructor
|
|
}
|
|
};
|
|
|
|
/*************************************************************************
|
|
* ROW_RES - Row results
|
|
*************************************************************************/
|
|
|
|
class ROW_RES:public ELIST_LINK {
|
|
public:
|
|
ROW * row; // real row
|
|
inT32 char_count; // chars in block
|
|
inT32 rej_count; // rejected chars
|
|
inT32 whole_word_rej_count; // rejs in total rej wds
|
|
WERD_RES_LIST word_res_list;
|
|
|
|
ROW_RES() {
|
|
} // empty constructor
|
|
|
|
ROW_RES(bool right_to_left, ROW *the_row); // real row
|
|
|
|
~ROW_RES() { // destructor
|
|
}
|
|
};
|
|
|
|
/*************************************************************************
|
|
* WERD_RES - Word results
|
|
*************************************************************************/
|
|
enum CRUNCH_MODE
|
|
{
|
|
CR_NONE,
|
|
CR_KEEP_SPACE,
|
|
CR_LOOSE_SPACE,
|
|
CR_DELETE
|
|
};
|
|
|
|
// WERD_RES is a collection of publicly accessible members that gathers
|
|
// information about a word result.
|
|
class WERD_RES : public ELIST_LINK {
|
|
public:
|
|
// Which word is which?
|
|
// There are 3 coordinate spaces in use here: a possibly rotated pixel space,
|
|
// the original image coordinate space, and the BLN space in which the
|
|
// baseline of a word is at kBlnBaselineOffset, the xheight is kBlnXHeight,
|
|
// and the x-middle of the word is at 0.
|
|
// In the rotated pixel space, coordinates correspond to the input image,
|
|
// but may be rotated about the origin by a multiple of 90 degrees,
|
|
// and may therefore be negative.
|
|
// In any case a rotation by denorm.block()->re_rotation() will take them
|
|
// back to the original image.
|
|
// The other differences between words all represent different stages of
|
|
// processing.
|
|
//
|
|
// The word is the input C_BLOBs in the rotated pixel space.
|
|
// word is NOT owned by the WERD_RES unless combination is true.
|
|
// All the other word pointers ARE owned by the WERD_RES.
|
|
WERD* word; // Input C_BLOB word.
|
|
// The bln_boxes contains the bounding boxes (only) of the input word, in the
|
|
// BLN space. The lengths of word and bln_boxes
|
|
// match as they are both before any chopping.
|
|
// TODO(rays) determine if docqual does anything useful and delete bln_boxes
|
|
// if it doesn't.
|
|
tesseract::BoxWord* bln_boxes; // BLN input bounding boxes.
|
|
// The chopped_word is also in BLN space, and represents the fully chopped
|
|
// character fragments that make up the word.
|
|
// The length of chopped_word matches length of seam_array + 1 (if set).
|
|
TWERD* chopped_word; // BLN chopped fragments output.
|
|
SEAMS seam_array; // Seams matching chopped_word.
|
|
// The rebuild_word is also in BLN space, but represents the final best
|
|
// segmentation of the word. Its length is therefore the same as box_word.
|
|
TWERD* rebuild_word; // BLN best segmented word.
|
|
// The denorm provides the transformation to get back to the rotated image
|
|
// coords from the chopped_word/rebuild_word BLN coords.
|
|
DENORM denorm; // For use on chopped_word.
|
|
// The box_word is in the original image coordinate space. It is the
|
|
// bounding boxes of the rebuild_word, after denormalization.
|
|
// The length of box_word matches rebuild_word, best_state (if set) and
|
|
// correct_text (if set), as well as best_choice and represents the
|
|
// number of classified units in the output.
|
|
tesseract::BoxWord* box_word; // Denormalized output boxes.
|
|
// The best_state stores the relationship between chopped_word and
|
|
// rebuild_word. Each blob[i] in rebuild_word is composed of best_state[i]
|
|
// adjacent blobs in chopped_word. The seams in seam_array are hidden
|
|
// within a rebuild_word blob and revealed between them.
|
|
GenericVector<int> best_state; // Number of blobs in each best blob.
|
|
// The correct_text is used during training and adaption to carry the
|
|
// text to the training system without the need for a unicharset. There
|
|
// is one entry in the vector for each blob in rebuild_word and box_word.
|
|
GenericVector<STRING> correct_text;
|
|
// The truth_* fields below are used by the blamer to determine the source
|
|
// of errors.
|
|
// The truth_word (in the original image coordinate space) contains ground
|
|
// truth bounding boxes for this WERD_RES.
|
|
tesseract::BoxWord* truth_word;
|
|
// The truth_text contains ground truth unichar for each
|
|
// of the bounding boxes in truth_word.
|
|
GenericVector<STRING> truth_text;
|
|
WERD_CHOICE *best_choice; // tess output
|
|
WERD_CHOICE *raw_choice; // top choice permuter
|
|
WERD_CHOICE *ep_choice; // ep text TODO(rays) delete this.
|
|
REJMAP reject_map; // best_choice rejects
|
|
BOOL8 tess_failed;
|
|
/*
|
|
If tess_failed is TRUE, one of the following tests failed when Tess
|
|
returned:
|
|
- The outword blob list was not the same length as the best_choice string;
|
|
- The best_choice string contained ALL blanks;
|
|
- The best_choice string was zero length
|
|
*/
|
|
BOOL8 tess_accepted; // Tess thinks its ok?
|
|
BOOL8 tess_would_adapt; // Tess would adapt?
|
|
BOOL8 done; // ready for output?
|
|
bool small_caps; // word appears to be small caps
|
|
inT8 italic;
|
|
inT8 bold;
|
|
inT16 fontinfo_id; // primary font id (should be at least inT16)
|
|
inT8 fontinfo_id_count; // number of votes
|
|
inT16 fontinfo_id2; // secondary font id (should be at least inT16)
|
|
inT8 fontinfo_id2_count; // number of votes
|
|
CRUNCH_MODE unlv_crunch_mode;
|
|
float x_height; // post match estimate
|
|
float caps_height; // post match estimate
|
|
BOOL8 guessed_x_ht;
|
|
BOOL8 guessed_caps_ht;
|
|
/*
|
|
To deal with fuzzy spaces we need to be able to combine "words" to form
|
|
combinations when we suspect that the gap is a non-space. The (new) text
|
|
ord code generates separate words for EVERY fuzzy gap - flags in the word
|
|
indicate whether the gap is below the threshold (fuzzy kern) and is thus
|
|
NOT a real word break by default, or above the threshold (fuzzy space) and
|
|
this is a real word break by default.
|
|
|
|
The WERD_RES list contains all these words PLUS "combination" words built
|
|
out of (copies of) the words split by fuzzy kerns. The separate parts have
|
|
their "part_of_combo" flag set true and should be IGNORED on a default
|
|
reading of the list.
|
|
|
|
Combination words are FOLLOWED by the sequence of part_of_combo words
|
|
which they combine.
|
|
*/
|
|
BOOL8 combination; //of two fuzzy gap wds
|
|
BOOL8 part_of_combo; //part of a combo
|
|
BOOL8 reject_spaces; //Reject spacing?
|
|
// FontInfo ids for each unichar in best_choice.
|
|
GenericVector<inT8> best_choice_fontinfo_ids;
|
|
|
|
WERD_RES() {
|
|
InitPointers();
|
|
}
|
|
WERD_RES( //simple constructor
|
|
WERD *the_word) { //real word
|
|
InitPointers();
|
|
word = the_word;
|
|
tess_failed = FALSE;
|
|
tess_accepted = FALSE;
|
|
tess_would_adapt = FALSE;
|
|
done = FALSE;
|
|
unlv_crunch_mode = CR_NONE;
|
|
small_caps = false;
|
|
italic = FALSE;
|
|
bold = FALSE;
|
|
fontinfo_id = -1;
|
|
fontinfo_id_count = 0;
|
|
fontinfo_id2 = -1;
|
|
fontinfo_id2_count = 0;
|
|
x_height = 0.0;
|
|
caps_height = 0.0;
|
|
guessed_x_ht = TRUE;
|
|
guessed_caps_ht = TRUE;
|
|
combination = FALSE;
|
|
part_of_combo = FALSE;
|
|
reject_spaces = FALSE;
|
|
}
|
|
WERD_RES(const WERD_RES &source) {
|
|
InitPointers();
|
|
*this = source; // see operator=
|
|
}
|
|
|
|
~WERD_RES();
|
|
void InitPointers();
|
|
void Clear();
|
|
void ClearResults();
|
|
|
|
WERD_RES& operator=(const WERD_RES& source); //from this
|
|
|
|
void CopySimpleFields(const WERD_RES& source);
|
|
|
|
// Sets up the members used in recognition:
|
|
// bln_boxes, chopped_word, seam_array, denorm, best_choice, raw_choice.
|
|
// Returns false if the word is empty and sets up fake results.
|
|
bool SetupForRecognition(const UNICHARSET& unicharset,
|
|
bool numeric_mode, ROW *row, BLOCK* block);
|
|
|
|
// Builds the rebuild_word from the chopped_word and the best_state.
|
|
void RebuildBestState();
|
|
|
|
// Copies the chopped_word to the rebuild_word, faking a best_state as well.
|
|
// Also sets up the output box_word.
|
|
void CloneChoppedToRebuild();
|
|
|
|
// Sets/replaces the box_word with one made from the rebuild_word.
|
|
void SetupBoxWord();
|
|
|
|
// Sets up the script positions in the output boxword using the best_choice
|
|
// to get the unichars, and the unicharset to get the target positions.
|
|
void SetScriptPositions(const UNICHARSET& unicharset);
|
|
|
|
// Classifies the word with some already-calculated BLOB_CHOICEs.
|
|
// The choices are an array of blob_count pointers to BLOB_CHOICE,
|
|
// providing a single classifier result for each blob.
|
|
// The BLOB_CHOICEs are consumed and the word takes ownership.
|
|
// The number of blobs in the outword must match blob_count.
|
|
void FakeClassifyWord(const UNICHARSET& unicharset, int blob_count,
|
|
BLOB_CHOICE** choices);
|
|
|
|
// Copies the best_choice strings to the correct_text for adaption/training.
|
|
void BestChoiceToCorrectText(const UNICHARSET& unicharset);
|
|
|
|
// Merges 2 adjacent blobs in the result if the permanent callback
|
|
// class_cb returns other than INVALID_UNICHAR_ID, AND the permanent
|
|
// callback box_cb is NULL or returns true, setting the merged blob
|
|
// result to the class returned from class_cb.
|
|
// Returns true if anything was merged.
|
|
bool ConditionalBlobMerge(
|
|
const UNICHARSET& unicharset,
|
|
TessResultCallback2<UNICHAR_ID, UNICHAR_ID, UNICHAR_ID>* class_cb,
|
|
TessResultCallback2<bool, const TBOX&, const TBOX&>* box_cb,
|
|
BLOB_CHOICE_LIST_CLIST *blob_choices);
|
|
|
|
static WERD_RES* deep_copy(const WERD_RES* src) {
|
|
return new WERD_RES(*src);
|
|
}
|
|
|
|
// Copy blobs from word_res onto this word (eliminating spaces between).
|
|
// Since this may be called bidirectionally OR both the BOL and EOL flags.
|
|
void copy_on(WERD_RES *word_res) { //from this word
|
|
word->set_flag(W_BOL, word->flag(W_BOL) || word_res->word->flag(W_BOL));
|
|
word->set_flag(W_EOL, word->flag(W_EOL) || word_res->word->flag(W_EOL));
|
|
word->copy_on(word_res->word);
|
|
}
|
|
};
|
|
|
|
/*************************************************************************
|
|
* PAGE_RES_IT - Page results iterator
|
|
*************************************************************************/
|
|
|
|
class PAGE_RES_IT {
|
|
public:
|
|
PAGE_RES * page_res; // page being iterated
|
|
|
|
PAGE_RES_IT() {
|
|
} // empty contructor
|
|
|
|
PAGE_RES_IT(PAGE_RES *the_page_res) { // page result
|
|
page_res = the_page_res;
|
|
restart_page(); // ready to scan
|
|
}
|
|
|
|
WERD_RES *restart_page() {
|
|
return start_page(false); // Skip empty blocks.
|
|
}
|
|
WERD_RES *restart_page_with_empties() {
|
|
return start_page(true); // Allow empty blocks.
|
|
}
|
|
WERD_RES *start_page(bool empty_ok);
|
|
|
|
// ============ Methods that mutate the underling structures ===========
|
|
// Note that these methods will potentially invalidate other PAGE_RES_ITs
|
|
// and are intended to be used only while a single PAGE_RES_IT is active.
|
|
// This problem needs to be taken into account if these mutation operators
|
|
// are ever provided to PageIterator or its subclasses.
|
|
|
|
// Inserts the new_word and a corresponding WERD_RES before the current
|
|
// position. The simple fields of the WERD_RES are copied from clone_res and
|
|
// the resulting WERD_RES is returned for further setup with best_choice etc.
|
|
WERD_RES* InsertCloneWord(const WERD_RES& clone_res, WERD* new_word);
|
|
|
|
// Deletes the current WERD_RES and its underlying WERD.
|
|
void DeleteCurrentWord();
|
|
|
|
WERD_RES *forward() { // Get next word.
|
|
return internal_forward(false, false);
|
|
}
|
|
// Move forward, but allow empty blocks to show as single NULL words.
|
|
WERD_RES *forward_with_empties() {
|
|
return internal_forward(false, true);
|
|
}
|
|
|
|
WERD_RES *forward_block(); // get first word in
|
|
// next non-empty block
|
|
WERD_RES *prev_word() const { // previous word
|
|
return prev_word_res;
|
|
}
|
|
ROW_RES *prev_row() const { // row of prev word
|
|
return prev_row_res;
|
|
}
|
|
BLOCK_RES *prev_block() const { // block of prev word
|
|
return prev_block_res;
|
|
}
|
|
WERD_RES *word() const { // current word
|
|
return word_res;
|
|
}
|
|
ROW_RES *row() const { // row of current word
|
|
return row_res;
|
|
}
|
|
BLOCK_RES *block() const { // block of cur. word
|
|
return block_res;
|
|
}
|
|
WERD_RES *next_word() const { // next word
|
|
return next_word_res;
|
|
}
|
|
ROW_RES *next_row() const { // row of next word
|
|
return next_row_res;
|
|
}
|
|
BLOCK_RES *next_block() const { // block of next word
|
|
return next_block_res;
|
|
}
|
|
void rej_stat_word(); // for page/block/row
|
|
|
|
private:
|
|
void ResetWordIterator();
|
|
WERD_RES *internal_forward(bool new_block, bool empty_ok);
|
|
|
|
WERD_RES * prev_word_res; // previous word
|
|
ROW_RES *prev_row_res; // row of prev word
|
|
BLOCK_RES *prev_block_res; // block of prev word
|
|
|
|
WERD_RES *word_res; // current word
|
|
ROW_RES *row_res; // row of current word
|
|
BLOCK_RES *block_res; // block of cur. word
|
|
|
|
WERD_RES *next_word_res; // next word
|
|
ROW_RES *next_row_res; // row of next word
|
|
BLOCK_RES *next_block_res; // block of next word
|
|
|
|
BLOCK_RES_IT block_res_it; // iterators
|
|
ROW_RES_IT row_res_it;
|
|
WERD_RES_IT word_res_it;
|
|
};
|
|
#endif
|