C++ TBOX::major_overlap方法代码示例

// Returns true if the given blob overlaps more than max_overlaps blobs
// in the current grid.
bool CCNonTextDetect::BlobOverlapsTooMuch(BLOBNBOX* blob, int max_overlaps) {
    // Search the grid to see what intersects it.
    // Setup a Rectangle search for overlapping this blob.
    BlobGridSearch rsearch(this);
    TBOX box = blob->bounding_box();
    rsearch.StartRectSearch(box);
    rsearch.SetUniqueMode(true);
    BLOBNBOX* neighbour;
    int overlap_count = 0;
    while (overlap_count <= max_overlaps &&
            (neighbour = rsearch.NextRectSearch()) != NULL) {
        if (box.major_overlap(neighbour->bounding_box())) {
            ++overlap_count;
            if (overlap_count > max_overlaps)
                return true;
        }
    }
    return false;
}

/// Consume all source blobs that strongly overlap the given box,
/// putting them into a new word, with the correct_text label.
/// Fights over which box owns which blobs are settled by
/// applying the blobs to box or next_box with the least non-overlap.
/// @return false if the box was in error, which can only be caused by
/// failing to find an overlapping blob for a box.
bool Tesseract::ResegmentWordBox(BLOCK_LIST *block_list,
                                 const TBOX& box, const TBOX& next_box,
                                 const char* correct_text) {
  if (applybox_debug > 1) {
    tprintf("\nAPPLY_BOX: in ResegmentWordBox() for %s\n", correct_text);
  }
  WERD* new_word = NULL;
  BLOCK_IT b_it(block_list);
  for (b_it.mark_cycle_pt(); !b_it.cycled_list(); b_it.forward()) {
    BLOCK* block = b_it.data();
    if (!box.major_overlap(block->bounding_box()))
      continue;
    ROW_IT r_it(block->row_list());
    for (r_it.mark_cycle_pt(); !r_it.cycled_list(); r_it.forward()) {
      ROW* row = r_it.data();
      if (!box.major_overlap(row->bounding_box()))
        continue;
      WERD_IT w_it(row->word_list());
      for (w_it.mark_cycle_pt(); !w_it.cycled_list(); w_it.forward()) {
        WERD* word = w_it.data();
        if (applybox_debug > 2) {
          tprintf("Checking word:");
          word->bounding_box().print();
        }
        if (word->text() != NULL && word->text()[0] != '\0')
          continue;  // Ignore words that are already done.
        if (!box.major_overlap(word->bounding_box()))
          continue;
        C_BLOB_IT blob_it(word->cblob_list());
        for (blob_it.mark_cycle_pt(); !blob_it.cycled_list();
             blob_it.forward()) {
          C_BLOB* blob = blob_it.data();
          TBOX blob_box = blob->bounding_box();
          if (!blob_box.major_overlap(box))
            continue;
          double current_box_miss_metric = BoxMissMetric(blob_box, box);
          double next_box_miss_metric = BoxMissMetric(blob_box, next_box);
          if (applybox_debug > 2) {
            tprintf("Checking blob:");
            blob_box.print();
            tprintf("Current miss metric = %g, next = %g\n",
                    current_box_miss_metric, next_box_miss_metric);
          }
          if (current_box_miss_metric > next_box_miss_metric)
            continue;  // Blob is a better match for next box.
          if (applybox_debug > 2) {
            tprintf("Blob match: blob:");
            blob_box.print();
            tprintf("Matches box:");
            box.print();
            tprintf("With next box:");
            next_box.print();
          }
          if (new_word == NULL) {
            // Make a new word with a single blob.
            new_word = word->shallow_copy();
            new_word->set_text(correct_text);
            w_it.add_to_end(new_word);
          }
          C_BLOB_IT new_blob_it(new_word->cblob_list());
          new_blob_it.add_to_end(blob_it.extract());
        }
      }
    }
  }
  if (new_word == NULL && applybox_debug > 0) tprintf("FAIL!\n");
  return new_word != NULL;
}