C++ BLOB_CHOICE::fontinfo_id方法代码示例

/**
 * BLOB_CHOICE::BLOB_CHOICE
 *
 * Constructor to build a BLOB_CHOICE from another BLOB_CHOICE.
 */
BLOB_CHOICE::BLOB_CHOICE(const BLOB_CHOICE &other) {
  unichar_id_ = other.unichar_id();
  rating_ = other.rating();
  certainty_ = other.certainty();
  fontinfo_id_ = other.fontinfo_id();
  fontinfo_id2_ = other.fontinfo_id2();
  script_id_ = other.script_id();
  language_model_state_ = NULL;
  min_xheight_ = other.min_xheight_;
  max_xheight_ = other.max_xheight_;
  adapted_ = other.adapted_;
}

/**
 * BLOB_CHOICE::BLOB_CHOICE
 *
 * Constructor to build a BLOB_CHOICE from another BLOB_CHOICE.
 */
BLOB_CHOICE::BLOB_CHOICE(const BLOB_CHOICE &other) {
  unichar_id_ = other.unichar_id();
  rating_ = other.rating();
  certainty_ = other.certainty();
  fontinfo_id_ = other.fontinfo_id();
  fontinfo_id2_ = other.fontinfo_id2();
  script_id_ = other.script_id();
  matrix_cell_ = other.matrix_cell_;
  min_xheight_ = other.min_xheight_;
  max_xheight_ = other.max_xheight_;
  yshift_ = other.yshift();
  classifier_ = other.classifier_;
}

/**
 * Return whether this is believable superscript or subscript text.
 *
 * We insist that:
 *   + there are no punctuation marks.
 *   + there are no italics.
 *   + no normal-sized character is smaller than superscript_scaledown_ratio
 *     of what it ought to be, and
 *   + each character is at least as certain as certainty_threshold.
 *
 *  @param[in]  debug  If true, spew debug output
 *  @param[in]  word   The word whose best_choice we're evaluating
 *  @param[in]  certainty_threshold   If any of the characters have less
 *                    certainty than this, reject.
 *  @param[out]  left_ok  How many left-side characters were ok?
 *  @param[out]  right_ok  How many right-side characters were ok?
 *  @return  Whether the complete best choice is believable as a superscript.
 */
bool Tesseract::BelievableSuperscript(bool debug,
                                      const WERD_RES &word,
                                      float certainty_threshold,
                                      int *left_ok,
                                      int *right_ok) const {
  int initial_ok_run_count = 0;
  int ok_run_count = 0;
  float worst_certainty = 0.0f;
  const WERD_CHOICE &wc = *word.best_choice;

  const UnicityTable<FontInfo>& fontinfo_table = get_fontinfo_table();
  for (int i = 0; i < wc.length(); i++) {
    TBLOB *blob = word.rebuild_word->blobs[i];
    UNICHAR_ID unichar_id = wc.unichar_id(i);
    float char_certainty = wc.certainty(i);
    bool bad_certainty = char_certainty < certainty_threshold;
    bool is_punc = wc.unicharset()->get_ispunctuation(unichar_id);
    bool is_italic = word.fontinfo && word.fontinfo->is_italic();
    BLOB_CHOICE *choice = word.GetBlobChoice(i);
    if (choice && fontinfo_table.size() > 0) {
      // Get better information from the specific choice, if available.
      int font_id1 = choice->fontinfo_id();
      bool font1_is_italic = font_id1 >= 0
          ? fontinfo_table.get(font_id1).is_italic() : false;
      int font_id2 = choice->fontinfo_id2();
      is_italic = font1_is_italic &&
          (font_id2 < 0 || fontinfo_table.get(font_id2).is_italic());
    }

    float height_fraction = 1.0f;
    float char_height = blob->bounding_box().height();
    float normal_height = char_height;
    if (wc.unicharset()->top_bottom_useful()) {
      int min_bot, max_bot, min_top, max_top;
      wc.unicharset()->get_top_bottom(unichar_id,
                                      &min_bot, &max_bot,
                                      &min_top, &max_top);
      float hi_height = max_top - max_bot;
      float lo_height = min_top - min_bot;
      normal_height = (hi_height + lo_height) / 2;
      if (normal_height >= kBlnXHeight) {
        // Only ding characters that we have decent information for because
        // they're supposed to be normal sized, not tiny specks or dashes.
        height_fraction = char_height / normal_height;
      }
    }
    bool bad_height = height_fraction < superscript_scaledown_ratio;

    if (debug) {
      if (is_italic) {
        tprintf(" Rejecting: superscript is italic.\n");
      }
      if (is_punc) {
        tprintf(" Rejecting: punctuation present.\n");
      }
      const char *char_str = wc.unicharset()->id_to_unichar(unichar_id);
      if (bad_certainty) {
        tprintf(" Rejecting: don't believe character %s with certainty %.2f "
                "which is less than threshold %.2f\n", char_str,
                char_certainty, certainty_threshold);
      }
      if (bad_height) {
        tprintf(" Rejecting: character %s seems too small @ %.2f versus "
                "expected %.2f\n", char_str, char_height, normal_height);
      }
    }
    if (bad_certainty || bad_height || is_punc || is_italic) {
      if (ok_run_count == i) {
        initial_ok_run_count = ok_run_count;
      }
      ok_run_count = 0;
    } else {
      ok_run_count++;
    }
    if (char_certainty < worst_certainty) {
      worst_certainty = char_certainty;
    }
  }
  bool all_ok = ok_run_count == wc.length();
  if (all_ok && debug) {
    tprintf(" Accept: worst revised certainty is %.2f\n", worst_certainty);
  }
//.........这里部分代码省略.........