Package com.itextpdf.pdfocr.onnxtr.recognition

Class Vocabulary

java.lang.Object
com.itextpdf.pdfocr.onnxtr.recognition.Vocabulary
public class Vocabulary extends Object
A string-based LUT for mapping text recognition model results to characters.

This class assumes, that each character is represented with a single UTF-16 code unit. So the string itself can be used as a LUT. If this is not the case, results will be unpredictable.

It pretty much implements IOutputLabelMapper for Character but since it would involve unnecessary boxing, it is a standalone thing instead.

  • Field Details

    • ASCII_LOWERCASE

      public static final Vocabulary ASCII_LOWERCASE

    • ASCII_UPPERCASE

      public static final Vocabulary ASCII_UPPERCASE

    • ASCII_LETTERS

      public static final Vocabulary ASCII_LETTERS

    • DIGITS

      public static final Vocabulary DIGITS

    • PUNCTUATION

      public static final Vocabulary PUNCTUATION

    • CURRENCY

      public static final Vocabulary CURRENCY

    • LATIN

      public static final Vocabulary LATIN

    • ENGLISH

      public static final Vocabulary ENGLISH

    • LEGACY_FRENCH

      public static final Vocabulary LEGACY_FRENCH

    • FRENCH

      public static final Vocabulary FRENCH

    • HINDI_DIGITS

      public static final Vocabulary HINDI_DIGITS

    • GENERIC_CYRILLIC_LETTERS

      public static final Vocabulary GENERIC_CYRILLIC_LETTERS

    • RUSSIAN_CYRILLIC_LETTERS

      public static final Vocabulary RUSSIAN_CYRILLIC_LETTERS

    • RUSSIAN_SIGNS

      public static final Vocabulary RUSSIAN_SIGNS

    • ANCIENT_GREEK

      public static final Vocabulary ANCIENT_GREEK

    • ARABIC_DIACRITICS

      public static final Vocabulary ARABIC_DIACRITICS

    • ARABIC_DIGITS

      public static final Vocabulary ARABIC_DIGITS

    • ARABIC_LETTERS

      public static final Vocabulary ARABIC_LETTERS

    • ARABIC_PUNCTUATION

      public static final Vocabulary ARABIC_PUNCTUATION

    • PERSIAN_LETTERS

      public static final Vocabulary PERSIAN_LETTERS

    • BENGALI_CONSONANTS

      public static final Vocabulary BENGALI_CONSONANTS

    • BENGALI_VOWELS

      public static final Vocabulary BENGALI_VOWELS

    • BENGALI_DIGITS

      public static final Vocabulary BENGALI_DIGITS

    • BENGALI_MATRAS

      public static final Vocabulary BENGALI_MATRAS

    • BENGALI_VIRAMA

      public static final Vocabulary BENGALI_VIRAMA

    • BENGALI_PUNCTUATION

      public static final Vocabulary BENGALI_PUNCTUATION

    • BENGALI_SIGNS

      public static final Vocabulary BENGALI_SIGNS

    • GUJARATI_CONSONANTS

      public static final Vocabulary GUJARATI_CONSONANTS

    • GUJARATI_VOWELS

      public static final Vocabulary GUJARATI_VOWELS

    • GUJARATI_DIGITS

      public static final Vocabulary GUJARATI_DIGITS

    • GUJARATI_MATRAS

      public static final Vocabulary GUJARATI_MATRAS

    • GUJARATI_VIRAMA

      public static final Vocabulary GUJARATI_VIRAMA

    • GUJARATI_PUNCTUATION

      public static final Vocabulary GUJARATI_PUNCTUATION

    • GUJARATI_SIGNS

      public static final Vocabulary GUJARATI_SIGNS

    • DEVANAGARI_CONSONANTS

      public static final Vocabulary DEVANAGARI_CONSONANTS

    • DEVANAGARI_VOWELS

      public static final Vocabulary DEVANAGARI_VOWELS

    • DEVANAGARI_DIGITS

      public static final Vocabulary DEVANAGARI_DIGITS

    • DEVANAGARI_MATRAS

      public static final Vocabulary DEVANAGARI_MATRAS

    • DEVANAGARI_VIRAMA

      public static final Vocabulary DEVANAGARI_VIRAMA

    • DEVANAGARI_PUNCTUATION

      public static final Vocabulary DEVANAGARI_PUNCTUATION

    • DEVANAGARI_SIGNS

      public static final Vocabulary DEVANAGARI_SIGNS

    • PUNJABI_CONSONANTS

      public static final Vocabulary PUNJABI_CONSONANTS

    • PUNJABI_VOWELS

      public static final Vocabulary PUNJABI_VOWELS

    • PUNJABI_DIGITS

      public static final Vocabulary PUNJABI_DIGITS

    • PUNJABI_MATRAS

      public static final Vocabulary PUNJABI_MATRAS

    • PUNJABI_VIRAMA

      public static final Vocabulary PUNJABI_VIRAMA

    • PUNJABI_PUNCTUATION

      public static final Vocabulary PUNJABI_PUNCTUATION

    • PUNJABI_SIGNS

      public static final Vocabulary PUNJABI_SIGNS

    • TAMIL_CONSONANTS

      public static final Vocabulary TAMIL_CONSONANTS

    • TAMIL_VOWELS

      public static final Vocabulary TAMIL_VOWELS

    • TAMIL_DIGITS

      public static final Vocabulary TAMIL_DIGITS

    • TAMIL_MATRAS

      public static final Vocabulary TAMIL_MATRAS

    • TAMIL_VIRAMA

      public static final Vocabulary TAMIL_VIRAMA

    • TAMIL_PUNCTUATION

      public static final Vocabulary TAMIL_PUNCTUATION

    • TAMIL_SIGNS

      public static final Vocabulary TAMIL_SIGNS

    • TAMIL_FRACTIONS

      public static final Vocabulary TAMIL_FRACTIONS

    • TELUGU_CONSONANTS

      public static final Vocabulary TELUGU_CONSONANTS

    • TELUGU_DIGITS

      public static final Vocabulary TELUGU_DIGITS

    • TELUGU_VOWELS

      public static final Vocabulary TELUGU_VOWELS

    • TELUGU_MATRAS

      public static final Vocabulary TELUGU_MATRAS

    • TELUGU_VIRAMA

      public static final Vocabulary TELUGU_VIRAMA

    • TELUGU_PUNCTUATION

      public static final Vocabulary TELUGU_PUNCTUATION

    • TELUGU_SIGNS

      public static final Vocabulary TELUGU_SIGNS

    • KANNADA_CONSONANTS

      public static final Vocabulary KANNADA_CONSONANTS

    • KANNADA_VOWELS

      public static final Vocabulary KANNADA_VOWELS

    • KANNADA_DIGITS

      public static final Vocabulary KANNADA_DIGITS

    • KANNADA_MATRAS

      public static final Vocabulary KANNADA_MATRAS

    • KANNADA_VIRAMA

      public static final Vocabulary KANNADA_VIRAMA

    • KANNADA_PUNCTUATION

      public static final Vocabulary KANNADA_PUNCTUATION

    • KANNADA_SIGNS

      public static final Vocabulary KANNADA_SIGNS

    • SINHALA_CONSONANTS

      public static final Vocabulary SINHALA_CONSONANTS

    • SINHALA_VOWELS

      public static final Vocabulary SINHALA_VOWELS

    • SINHALA_DIGITS

      public static final Vocabulary SINHALA_DIGITS

    • SINHALA_MATRAS

      public static final Vocabulary SINHALA_MATRAS

    • SINHALA_VIRAMA

      public static final Vocabulary SINHALA_VIRAMA

    • SINHALA_PUNCTUATION

      public static final Vocabulary SINHALA_PUNCTUATION

    • SINHALA_SIGNS

      public static final Vocabulary SINHALA_SIGNS

    • MALAYALAM_CONSONANTS

      public static final Vocabulary MALAYALAM_CONSONANTS

    • MALAYALAM_VOWELS

      public static final Vocabulary MALAYALAM_VOWELS

    • MALAYALAM_DIGITS

      public static final Vocabulary MALAYALAM_DIGITS

    • MALAYALAM_MATRAS

      public static final Vocabulary MALAYALAM_MATRAS

    • MALAYALAM_VIRAMA

      public static final Vocabulary MALAYALAM_VIRAMA

    • MALAYALAM_SIGNS

      public static final Vocabulary MALAYALAM_SIGNS

    • ODIA_CONSONANTS

      public static final Vocabulary ODIA_CONSONANTS

    • ODIA_VOWELS

      public static final Vocabulary ODIA_VOWELS

    • ODIA_DIGITS

      public static final Vocabulary ODIA_DIGITS

    • ODIA_MATRAS

      public static final Vocabulary ODIA_MATRAS

    • ODIA_VIRAMA

      public static final Vocabulary ODIA_VIRAMA

    • ODIA_PUNCTUATION

      public static final Vocabulary ODIA_PUNCTUATION

    • ODIA_SIGNS

      public static final Vocabulary ODIA_SIGNS

    • KHMER_CONSONANTS

      public static final Vocabulary KHMER_CONSONANTS

    • KHMER_VOWELS

      public static final Vocabulary KHMER_VOWELS

    • KHMER_DIGITS

      public static final Vocabulary KHMER_DIGITS

    • KHMER_MATRAS

      public static final Vocabulary KHMER_MATRAS

    • KHMER_DIACRITICS

      public static final Vocabulary KHMER_DIACRITICS

    • KHMER_VIRAMA

      public static final Vocabulary KHMER_VIRAMA

    • KHMER_PUNCTUATION

      public static final Vocabulary KHMER_PUNCTUATION

    • BURMESE_CONSONANTS

      public static final Vocabulary BURMESE_CONSONANTS

    • BURMESE_VOWELS

      public static final Vocabulary BURMESE_VOWELS

    • BURMESE_DIGITS

      public static final Vocabulary BURMESE_DIGITS

    • BURMESE_DIACRITICS

      public static final Vocabulary BURMESE_DIACRITICS

    • BURMESE_VIRAMA

      public static final Vocabulary BURMESE_VIRAMA

    • BURMESE_PUNCTUATION

      public static final Vocabulary BURMESE_PUNCTUATION

    • JAVANESE_CONSONANTS

      public static final Vocabulary JAVANESE_CONSONANTS

    • JAVANESE_VOWELS

      public static final Vocabulary JAVANESE_VOWELS

    • JAVANESE_DIGITS

      public static final Vocabulary JAVANESE_DIGITS

    • JAVANESE_DIACRITICS

      public static final Vocabulary JAVANESE_DIACRITICS

    • JAVANESE_VIRAMA

      public static final Vocabulary JAVANESE_VIRAMA

    • JAVANESE_PUNCTUATION

      public static final Vocabulary JAVANESE_PUNCTUATION

    • SUDANESE_CONSONANTS

      public static final Vocabulary SUDANESE_CONSONANTS

    • SUDANESE_VOWELS

      public static final Vocabulary SUDANESE_VOWELS

    • SUDANESE_DIGITS

      public static final Vocabulary SUDANESE_DIGITS

    • SUDANESE_DIACRITICS

      public static final Vocabulary SUDANESE_DIACRITICS

    • HEBREW_CANTILLATIONS

      public static final Vocabulary HEBREW_CANTILLATIONS

    • HEBREW_CONSONANTS

      public static final Vocabulary HEBREW_CONSONANTS

    • HEBREW_SPECIALS

      public static final Vocabulary HEBREW_SPECIALS

    • HEBREW_PUNCTUATION

      public static final Vocabulary HEBREW_PUNCTUATION

    • HEBREW_VOWELS

      public static final Vocabulary HEBREW_VOWELS

    • ALBANIAN

      public static final Vocabulary ALBANIAN

    • AFRIKAANS

      public static final Vocabulary AFRIKAANS

    • BASQUE

      public static final Vocabulary BASQUE

    • CATALAN

      public static final Vocabulary CATALAN

    • CROATIAN

      public static final Vocabulary CROATIAN

    • CZECH

      public static final Vocabulary CZECH

    • DANISH

      public static final Vocabulary DANISH

    • DUTCH

      public static final Vocabulary DUTCH

    • ESTONIAN

      public static final Vocabulary ESTONIAN

    • FINNISH

      public static final Vocabulary FINNISH

    • GERMAN

      public static final Vocabulary GERMAN

    • HUNGARIAN

      public static final Vocabulary HUNGARIAN

    • INDONESIAN

      public static final Vocabulary INDONESIAN

    • IRISH

      public static final Vocabulary IRISH

    • ITALIAN

      public static final Vocabulary ITALIAN

    • LUXEMBOURGISH

      public static final Vocabulary LUXEMBOURGISH

    • MALAY

      public static final Vocabulary MALAY

    • NORWEGIAN

      public static final Vocabulary NORWEGIAN

    • POLISH

      public static final Vocabulary POLISH

    • PORTUGUESE

      public static final Vocabulary PORTUGUESE

    • ROMANIAN

      public static final Vocabulary ROMANIAN

    • SERBIAN_LATIN

      public static final Vocabulary SERBIAN_LATIN

    • SLOVAK

      public static final Vocabulary SLOVAK

    • SPANISH

      public static final Vocabulary SPANISH

    • SWEDISH

      public static final Vocabulary SWEDISH

    • VIETNAMESE

      public static final Vocabulary VIETNAMESE

    • ZULU

      public static final Vocabulary ZULU

    • AZERBAIJANI

      public static final Vocabulary AZERBAIJANI

    • BOSNIAN

      public static final Vocabulary BOSNIAN

    • ESPERANTO

      public static final Vocabulary ESPERANTO

    • FRISIAN

      public static final Vocabulary FRISIAN

    • GALICIAN

      public static final Vocabulary GALICIAN

    • HAUSA

      public static final Vocabulary HAUSA

    • ICELANDIC

      public static final Vocabulary ICELANDIC

    • LATVIAN

      public static final Vocabulary LATVIAN

    • LITHUANIAN

      public static final Vocabulary LITHUANIAN

    • MALAGASY

      public static final Vocabulary MALAGASY

    • MALTESE

      public static final Vocabulary MALTESE

    • MAORI

      public static final Vocabulary MAORI

    • MONTENEGRIN

      public static final Vocabulary MONTENEGRIN

    • QUECHUA

      public static final Vocabulary QUECHUA

    • SCOTTISH_GAELIC

      public static final Vocabulary SCOTTISH_GAELIC

    • SLOVENE

      public static final Vocabulary SLOVENE

    • SOMALI

      public static final Vocabulary SOMALI

    • SWAHILI

      public static final Vocabulary SWAHILI

    • TAGALOG

      public static final Vocabulary TAGALOG

    • TURKISH

      public static final Vocabulary TURKISH

    • UZBEK_LATIN

      public static final Vocabulary UZBEK_LATIN

    • WELSH

      public static final Vocabulary WELSH

    • YORUBA

      public static final Vocabulary YORUBA

    • RUSSIAN

      public static final Vocabulary RUSSIAN

    • BELARUSIAN

      public static final Vocabulary BELARUSIAN

    • UKRAINIAN

      public static final Vocabulary UKRAINIAN

    • TATAR

      public static final Vocabulary TATAR

    • TAJIK

      public static final Vocabulary TAJIK

    • KAZAKH

      public static final Vocabulary KAZAKH

    • KYRGYZ

      public static final Vocabulary KYRGYZ

    • BULGARIAN

      public static final Vocabulary BULGARIAN

    • MACEDONIAN

      public static final Vocabulary MACEDONIAN

    • MONGOLIAN

      public static final Vocabulary MONGOLIAN

    • YAKUT

      public static final Vocabulary YAKUT

    • SERBIAN_CYRILLIC

      public static final Vocabulary SERBIAN_CYRILLIC

    • UZBEK_CYRILLIC

      public static final Vocabulary UZBEK_CYRILLIC

    • GREEK

      public static final Vocabulary GREEK

    • GREEK_EXTENDED

      public static final Vocabulary GREEK_EXTENDED

    • HEBREW

      public static final Vocabulary HEBREW

    • ARABIC

      public static final Vocabulary ARABIC

    • PERSIAN

      public static final Vocabulary PERSIAN

    • URDU

      public static final Vocabulary URDU

    • PASHTO

      public static final Vocabulary PASHTO

    • KURDISH

      public static final Vocabulary KURDISH

    • UYGHUR

      public static final Vocabulary UYGHUR

    • SINDHI

      public static final Vocabulary SINDHI

    • DEVANAGARI

      public static final Vocabulary DEVANAGARI

    • HINDI

      public static final Vocabulary HINDI

    • SANSKRIT

      public static final Vocabulary SANSKRIT

    • MARATHI

      public static final Vocabulary MARATHI

    • NEPALI

      public static final Vocabulary NEPALI

    • GUJARATI

      public static final Vocabulary GUJARATI

    • BENGALI

      public static final Vocabulary BENGALI

    • TAMIL

      public static final Vocabulary TAMIL

    • TELUGU

      public static final Vocabulary TELUGU

    • KANNADA

      public static final Vocabulary KANNADA

    • SINHALA

      public static final Vocabulary SINHALA

    • MALAYALAM

      public static final Vocabulary MALAYALAM

    • PUNJABI

      public static final Vocabulary PUNJABI

    • ODIA

      public static final Vocabulary ODIA

    • KHMER

      public static final Vocabulary KHMER

    • ARMENIAN

      public static final Vocabulary ARMENIAN

    • SUDANESE

      public static final Vocabulary SUDANESE

    • THAI

      public static final Vocabulary THAI

    • LAO

      public static final Vocabulary LAO

    • BURMESE

      public static final Vocabulary BURMESE

    • JAVANESE

      public static final Vocabulary JAVANESE

    • GEORGIAN

      public static final Vocabulary GEORGIAN

    • ETHIOPIC

      public static final Vocabulary ETHIOPIC

    • JAPANESE

      public static final Vocabulary JAPANESE

    • KOREAN

      public static final Vocabulary KOREAN

    • SIMPLIFIED_CHINESE

      public static final Vocabulary SIMPLIFIED_CHINESE

    • LATIN_EXTENDED

      public static final Vocabulary LATIN_EXTENDED

    • MULTI_LANG

      public static final Vocabulary MULTI_LANG

    • MULTI_LANG_FULL

      public static final Vocabulary MULTI_LANG_FULL

  • Constructor Details

    • Vocabulary

      public Vocabulary (String lookUpString)
      Creates a new vocabulary based on a look-up string.
      Parameters:
      lookUpString - look-up string to be used as LUT for the vocabulary

  • Method Details

    • concat

      public static Vocabulary concat (Vocabulary... vocabularies)
      Creates a new vocabulary by concatenating multiple ones.
      Parameters:
      vocabularies - vocabularies to concatenate
      Returns:
      the new aggregated vocabulary

    • getLookUpString

      public String getLookUpString()
      Returns the look-up string.
      Returns:
      the look-up string

    • size

      public int size()
      Returns the size of the vocabulary.
      Returns:
      the size of the vocabulary

    • map

      public char map (int index)
      Returns character, which is mapped to the specified index in the lookup string.
      Parameters:
      index - index to map
      Returns:
      mapped character

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals (Object o)
      Overrides:
      equals in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object