コード例 #1
0
ファイル: chopper.cpp プロジェクト: vidiecan/tesseract
/**
 * @name attempt_blob_chop
 *
 * Try to split the this blob after this one.  Check to make sure that
 * it was successful.
 */
SEAM *Wordrec::attempt_blob_chop(TWERD *word, TBLOB *blob, int32_t blob_number,
                                 bool italic_blob,
                                 const GenericVector<SEAM*>& seams) {
  if (repair_unchopped_blobs)
    preserve_outline_tree (blob->outlines);
  TBLOB *other_blob = TBLOB::ShallowCopy(*blob);       /* Make new blob */
  // Insert it into the word.
  word->blobs.insert(other_blob, blob_number + 1);

  SEAM *seam = nullptr;
  if (prioritize_division) {
    TPOINT location;
    if (divisible_blob(blob, italic_blob, &location)) {
      seam = new SEAM(0.0f, location);
    }
  }
  if (seam == nullptr)
    seam = pick_good_seam(blob);
  if (chop_debug) {
    if (seam != nullptr)
      seam->Print("Good seam picked=");
    else
      tprintf("\n** no seam picked *** \n");
  }
  if (seam) {
    seam->ApplySeam(italic_blob, blob, other_blob);
  }

  seam = CheckSeam(chop_debug, blob_number, word, blob, other_blob,
                   seams, seam);
  if (seam == nullptr) {
    if (repair_unchopped_blobs)
      restore_outline_tree(blob->outlines);
    if (allow_blob_division && !prioritize_division) {
      // If the blob can simply be divided into outlines, then do that.
      TPOINT location;
      if (divisible_blob(blob, italic_blob, &location)) {
        other_blob = TBLOB::ShallowCopy(*blob);       /* Make new blob */
        word->blobs.insert(other_blob, blob_number + 1);
        seam = new SEAM(0.0f, location);
        seam->ApplySeam(italic_blob, blob, other_blob);
        seam = CheckSeam(chop_debug, blob_number, word, blob, other_blob,
                         seams, seam);
      }
    }
  }
  if (seam != nullptr) {
    // Make sure this seam doesn't get chopped again.
    seam->Finalize();
  }
  return seam;
}
コード例 #2
0
ファイル: findseam.cpp プロジェクト: xmarston/BillRecognizer
/**********************************************************************
 * choose_best_seam
 *
 * Choose the best seam that can be created by assembling this a
 * collection of splits.  A queue of all the possible seams is
 * maintained.  Each new split received is placed in that queue with
 * its partial priority value.  These values in the seam queue are
 * evaluated and combined until a good enough seam is found.  If no
 * further good seams are being found then this function returns to the
 * caller, who will send more splits.  If this function is called with
 * a split of NULL, then no further splits can be supplied by the
 * caller.
 **********************************************************************/
void Wordrec::choose_best_seam(SeamQueue *seam_queue, const SPLIT *split,
                               PRIORITY priority, SEAM **seam_result,
                               TBLOB *blob, SeamPile *seam_pile) {
  SEAM *seam;
  char str[80];
  float my_priority;
  /* Add seam of split */
  my_priority = priority;
  if (split != NULL) {
    TPOINT split_point = split->point1->pos;
    split_point += split->point2->pos;
    split_point /= 2;
    seam = new SEAM(my_priority, split_point, *split);
    if (chop_debug > 1) seam->Print("Partial priority    ");
    add_seam_to_queue(my_priority, seam, seam_queue);

    if (my_priority > chop_good_split)
      return;
  }

  TBOX bbox = blob->bounding_box();
  /* Queue loop */
  while (!seam_queue->empty()) {
    SeamPair seam_pair;
    seam_queue->Pop(&seam_pair);
    seam = seam_pair.extract_data();
    /* Set full priority */
    my_priority = seam->FullPriority(bbox.left(), bbox.right(),
                                     chop_overlap_knob, chop_centered_maxwidth,
                                     chop_center_knob, chop_width_change_knob);
    if (chop_debug) {
      sprintf (str, "Full my_priority %0.0f,  ", my_priority);
      seam->Print(str);
    }

    if ((*seam_result == NULL || (*seam_result)->priority() > my_priority) &&
        my_priority < chop_ok_split) {
      /* No crossing */
      if (seam->IsHealthy(*blob, chop_min_outline_points,
                          chop_min_outline_area)) {
        delete *seam_result;
        *seam_result = new SEAM(*seam);
        (*seam_result)->set_priority(my_priority);
      } else {
        delete seam;
        seam = NULL;
        my_priority = BAD_PRIORITY;
      }
    }

    if (my_priority < chop_good_split) {
      if (seam)
        delete seam;
      return;                    /* Made good answer */
    }

    if (seam) {
      /* Combine with others */
      if (seam_pile->size() < chop_seam_pile_size) {
        combine_seam(*seam_pile, seam, seam_queue);
        SeamDecPair pair(seam_pair.key(), seam);
        seam_pile->Push(&pair);
      } else if (chop_new_seam_pile &&
                 seam_pile->size() == chop_seam_pile_size &&
                 seam_pile->PeekTop().key() > seam_pair.key()) {
        combine_seam(*seam_pile, seam, seam_queue);
        SeamDecPair pair;
        seam_pile->Pop(&pair);  // pop the worst.
        // Replace the seam in pair (deleting the old one) with
        // the new seam and score, then push back into the heap.
        pair.set_key(seam_pair.key());
        pair.set_data(seam);
        seam_pile->Push(&pair);
      } else {
        delete seam;
      }
    }

    my_priority = seam_queue->empty() ? NO_FULL_PRIORITY
                                      : seam_queue->PeekTop().key();
    if ((my_priority > chop_ok_split) ||
      (my_priority > chop_good_split && split))
      return;
  }
}