The document discusses a project called IMPACT that is supported by the European Community under its FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands. It focuses on developing computer lexicons to help with optical character recognition (OCR) and information retrieval of historical documents.

1. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Computer Lexica in OCR and Retrieval
Katrien Depuydt, Jesse de Does
(Instituut voor Nederlandse Lexicologie, Leiden)

2. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Can we handle ‘de wereld’ (‘the world’)’?
werreid
4 March 2009 presentation The Hague 2

3. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
OCR:
Abbyy Finereader SDK with built in standard Dutch dictionary
OCR:
Abbyy Finereader SDK combining built in modernDutch dictionary with
IMPACT external historical lexicon of Dutch:
werreld
IMPACT <Demo Day BL, 12 July 2011> 3

4. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
werelt weerelt wereld weerelds wereldt
werelden weereld werrelts waerelds
weerlyt wereldts vveerelts waereld
weerelden waerelden weerlt werlt
werelds sweerels zwerlys swarels
swerelts werelts swerrels weirelts
tsweerelds werret vverelt werlts
werrelt worreld werlden wareld
weirelt weireld waerelt werreld werld
vvereld weerelts werlde tswerels
werreldts weereldt wereldje waereldje
weurlt wald weëled
RETRIEVAL: key in modern WERELD and find all
IMPACT <Demo Day BL, 12 July 2011> 4

5. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
The long s problem: An example ….
OCR at start of project
A. De eerde was de gevaarlykflti om de verlei¬ .
ding aan 't Hof; de tweede de ftillie en veiligde;
de derde de zwaarde, daar hy byna drie millioenen
harde en onbefchaafde Menfchen beftieren moest.
IMPACT workshop, Bratislava, May 7, 2010 5

6. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
The long s problem: An example ….
OCR at start of project Results April 2010
A. De eerde was de gevaarlykflti om de verlei¬ A. De eerste was de gevaarlykste om de verlei-
ding aan 't Hof; de tweede de ftillie en veiligde; ding aan 't Hof; de tweede de stilste en veiligste;
de derde de zwaarde, daar hy byna drie millioenen de derde de zwaarste, daar hy byna drie millioenen
harde en onbefchaafde Menfchen beftieren moest. harde en onbeschaafde Menschen bestieren moest.
IMPACT workshop, Bratislava, May 7, 2010 6

7. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
The long s problem: An example ….
OCR at start of project Results April 2010
A. De eerde was de gevaarlykflti om de verlei¬ A. De eerste was de gevaarlykste om de verlei-
ding aan 't Hof; de tweede de ftillie en veiligde; ding aan 't Hof; de tweede de stilste en veiligste;
de derde de zwaarde, daar hy byna drie millioenen de derde de zwaarste, daar hy byna drie millioenen
harde en onbefchaafde Menfchen beftieren moest. harde en onbeschaafde Menschen bestieren moest.
Workaround: “integrated postcorrection” tell the engine that “eerfte” is OK and
postcorrect it afterwards with the lexicon.
In this way we keep it from turning to “eerde” (earth) instead of “eerste” (first)
IMPACT workshop, Bratislava, May 7, 2010 7

8. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Overview
What is a computer lexicon
Lexica in IMPACT
Tools for lexicon building and applying lexica
Some results
Searching Demonstration
IMPACT <Demo Day BL, 12 July 2011> 8

9. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
What is a computer lexicon?
IMPACT <Demo Day BL, 12 July 2011> 9

10. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Computer lexicon vs electronic dictionary (1)
An electronic dictionary is:
Digitised full text (no pictures)
For human use
Ideally: searchable with explicitely coded material (XML), such as a
lemma, part of speech (PoS), meaning, quotes etc.
Examples: OED online, WNT online
IMPACT <Demo Day BL, 12 July 2011> 10

11. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Dictionary XML (example)
IMPACT <Demo Day BL, 12 July 2011> 11

12. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT <Demo Day BL, 12 July 2011> 12

13. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Computer Lexicon vs Electronic Dictionary (2)
A computer lexicon is:
Always in a structured digital format (XML, relational database)
Main purpose: computer application
Explicitely coded information (e.g. lemma wereld, part of speech
noun, morphology werelden, werelds … , syntax)
Examples of use:
Linguistic enrichment of text material
‘Advanced’ searching (words with all spelling variant and inflections)
Automatic summarization, keyword extraction…
IMPACT <Demo Day BL, 12 July 2011> 13

14. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT <Demo Day BL, 12 July 2011> 14

15. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Lexica in IMPACT
IMPACT <Demo Day BL, 12 July 2011> 15

16. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
The OCR lexicon
An OCR lexicon is
A checked list of words in a language
Based on a corpus (collection) of dated texts (selection!)
Preferably with frequency information
Preferably from the same time period or of the same text type as
the texts you wish to digitize
IMPACT <Demo Day BL, 12 July 2011> 16

17. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
OCR lexicon: example
1550-1750 > 1900
song 820 television 418
rihte 818 electronic 375
theire 818 video 194
manye 818 hormone 176
sume 815 jazz 162
Do 814 eco 142
Whiche 811 software 136
fyrst 811 vitamin 128
while 811 movie 121
Water 810 taxi 113
wt 809 isotopic 108
shalbe 808 electronics 95
thingis 807 radar 86
again 806 basically 71
sona 806 sabotage 71
wa 805 homozygote 70
mode 804 psychedelic 67
work 802 phonemic 66
between 801 insulin 64
law 799 zap 64
moder 798 antibody 61
mis 798 fungicidal 61
softe 798
IMPACT <Demo Day BL, 12 July 2011> 17

18. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
The IR lexicon
IR lexicon: most important information categories
word forms (lists of words) +
- frequency information
- quotes (dated sources) from corpora or electronic
dictionaries
- MODERN LEMMA (// entrance dictionary) linked to spelling
variants and inflected forms of the same word
The modern lemma is used for searching in texts
Standard use in corpus linguistics and modern historical lexicography
IMPACT <Demo Day BL, 12 July 2011> 18

19. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
<?xml version='1.0'?>
<!DOCTYPE lexicon SYSTEM 'NL_Structure.dtd'>
<lexicon>
<lexical_entry><lemma_id>219490</lemma_id>
<modern_lemma>aantuilen</modern_lemma>
<gloss></gloss>
<POS>VRB</POS>
<ne_label></ne_label>
<language_id></language_id>
<portmanteau_lemma_id></portmanteau_lemma_id>
<wordform><form_representation>
<wordform_id>850026</wordform_id>
<written_form>tuyld</written_form>
<attestation><id>92141</id>
<token_id></token_id>
<quote>Verhael ick (<I>t.w. een als vrouw verkleede man</I>) haer mijn min in Vrouwelijcker schynen:
Sy acht het boertery, en tuyld daer weer op an, Vermits een Vrou niet op een Vrou verlieven kan,</quote>
<derivation_id>0</derivation_id>
<document_id>204</document_id>
<start_pos>119</start_pos>
<end_pos>124</end_pos>
</attestation>
</form_representation>
</wordform> <Demo Day BL, 12 July 2011>
IMPACT 19

20. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Tools for lexicon building and application of lexica
IMPACT <Demo Day BL, 12 July 2011> 20

21. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Types variation (spelling, inflection…)
uytterlijcste uyterlijkste d'uyterlijke uiterlyke uyterlijcke uiterlijke uyterlijck uiterlyken
uiterlijkste uiterlicke wterlicke wterlijcke ulterlijk uiterlyk uiterlijk uyterlick wterlicken
d'uyterlijcke uiterlijken uiterlijks wterlijck uytterlicke uitterlijke ujterlijke uytterlijk uyterlycke
uyterlicken uijterlicke d'uiterlijcke wtterlijcke wterlyke wtterlijk uuterlick uuterlic uyterlijke
I uyterlijcken uyterlicke d'uiterlyke wterlijke vuyterlijcke uuterlycke uuterlicke wterlijken
uyterlijcksten uuyterlicke uuyterlick uuyterlycke uytterlijcke uytterlycke uytterlick vuytterlicke
uiterlijker uyterlyck uterliek wterlijcken uiterlijkst uitterlijk uytterlijcken uyterlyk wterlick
uutterlijck uuyterlicken uyttelijck uijterlijk uytterlijck uuterlijck uiterlick uitterlyk uuyterlic
uuyterlyck uuyterlijck uiterlijck uytterlyck uterlyc wterlijk
(patterns to predict variation)
werelt weerelt wereld weerelds wereldt werelden weereld werrelts waerelds weerlyt
wereldts vveerelts waereld weerelden waerelden weerlt werlt werelds sweerels zwerlys
II swarels swerelts werelts swerrels weirelts tsweerelds werret vverelt werlts werrelt
worreld werlden wareld weirelt weireld waerelt werreld werld vvereld weerelts werlde
tswerels werreldts weereldt wereldje waereldje weurlt wald weëled
(a number are predictable with patterns, others need to be taken from a lexicon )
IMPACT <Demo Day BL, 12 July 2011> 21

22. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Neil Fitzgerald, 7th July 2011 22

23. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Computer lexica
For OCR and OCR post correction
Improving searchability of historic text material by building a lexicon
with variants by using a modern lemma as a search entry
Tools for lexicon building
Tools for application of lexicon in search engines
Lexicon cookbook
IMPACT <Demo Day BL, 12 July 2011> 23

24. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Tools (more specific)
- Lexicon building from corpus material and dictionaries
- Use of lexica in search engines
- Tool to extract spelling variation patterns from historical
material
- Tool to relate previously unrecognised spelling variations to
their standard form
- Tool to deduct previously unrecognised inflected forms to their
basic form
IMPACT <Demo Day BL, 12 July 2011> 24

25. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Spelling variation tools (pattern-based)
Language-independent approach:
Supervised rule (pattern) induction from pairs (“modern” word,
historical word), yielding patterns like aa/ae, s/z, ….
Pattern weights are computed from example material
Additional approaches possible, eg. :
Use of aligned data (parallel historical text and modern version)
IMPACT workshop, Bratislava, May 7, 2010 25

26. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Lemmatization
Reduction of historical word forms to modern lemma
Historical word standard (“modern”) spelling lemma form
(pattern matching) (lemmatizer)
Dystels (1) distels (2) distel
When we have a perfect or near-perfect modern full form
lexicon, the second step is simply lexicon lookup.
But:
1) We will not have full form information for many lemmata
(especially the historical ones)
2) Even lemmata present in modern language may have historical
inflected forms different from the present-day paradigm
IMPACT workshop, Bratislava, May 7, 2010 26

27. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Lemmatization and reverse lemmatization
We also need a lemmatization process for these situations
A typical lemmatizer assigns some standard form (infinitive,
nominative, stem) to inflected forms. Usually based on patterns
relating the inflected form to the standard form.
But:
Matching these patterns can be hard to combine with matching
both spelling variation patterns and OCR errors
(bok/bokken/bokkeu)
We adopt the solution of actually expanding the “hypothetical
modern full form lexicon” containing the most plausible possible
paradigmatic expansions of lemmata
This construction is carried out by means of a statistical reverse
lemmatizer
IMPACT workshop, Bratislava, May 7, 2010 27

28. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Attestation
From hypothetical (non-witnessed) lexicon content to attested word
forms in “real” text
Automatic selection of candidate attestations
Manual work: verification and correction
Two approaches
Dictionary based (INL): Woordenboek der Nederlandsche Taal
Corpus based (LMU, INL): Dutch DBNL corpus
IMPACT workshop, Bratislava, May 7, 2010 28

29. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT Dictionary Attestation Tool
Lexicon building at work: Verifying attestations in historical dictionaries
Task
Find the variants of a headword as they occur in the quotations
headword
work
• We are working on what works.
• Depart from me, ye that worke iniquity. Quotations
• She worcketh knittinge of stockings.
variants
IMPACT workshop, Bratislava, May 7, 2010 29

30. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT Dictionary Attestation Tool
Task
Find the variants of a headword as they occur in the quotations
Automatically (preprocessing)
Electronic
• match literally
historical
e.g: work work, Work
dictionary
• match using existing lexica and lists
Database
with lemmata
and quotatioms e.g: work works, worked, wrought
• approximate matching
e.g: work worke
By hand (using the tool)
• correct automatic mismatches
e.g: works words, worms
• find missed matches
e.g: work worketh, wrowght
IMPACT workshop, Bratislava, May 7, 2010 30

31. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT Attestation Tool
Up-to-date overview of what is done and needs to be don
Tool
Done by this user so far
Lemma headword
Quotations
Sorted by uncertainty
IMPACT workshop, Bratislava, May 7, 2010 31

32. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
IMPACT Lexicon Tool
Task
Find and verify attestations in a historical corpus
Automatically (preprocessing = apply lemmatizer)
• match literally
e.g: work work, Work
• match using existing lexica and lists
e.g: work works, worked, wrought
• matching using spelling variation module
e.g: uiterlijk uyterlick
By hand (using the tool)
• assign correct lemma
e.g: was (N) zijn (V)
• group tokens belonging together
e.g: konings zoon koningszoon
• select attestations
IMPACT workshop, Bratislava, May 7, 2010 32

33. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Corpus-based lexicon building: Impact Lexicon
Tool
IMPACT workshop, Bratislava, May 7, 2010 33

34. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
General vocabulary vs. Named entities
Tools for lexicon building described so far: applicable to general
lexicon
Tools for NE recognition, classification and variant matching
- library requirement
- distinguish general vocabulary from NE’s
- avoid unpleasant mixups like Abimelech apemelk!
(b/p; i/e; e/0; k/ch)
IMPACT workshop, Bratislava, May 7, 2010 34

35. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Improvement of state of the art / innovation
We use existing computational linguistic approaches, but figure out
how to apply them to historical language
We develop a workflow to deal with the problems posed by historical
language, figuring out how all pieces fit together
Data selection and acquisition
Manual work
Computational linguistics tools
IMPACT workshop, Bratislava, May 7, 2010 35

36. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
languages in IMPACT
Dutch, German, English, Spanish, French
Polish, Czech, Slovene and Bulgarian
- Cross language perspective paper
- Parallel OCR and IR experiments
- GT datasets
- Language tools: language independent
- Except from 3 core languages: proof of concept lexica
IMPACT <Demo Day BL, 12 July 2011> 36

37. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
OCR evaluation results
(preliminary!)

38. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
1. Czech
Co jest konstituce?, čili, Krátký, prostonárodní wýklad hlawnějších
zásad konstitucí ewropejských, 1848
Ferina Lišák z Kuliferdy a na Klukově, čili, Kratičká historye
zlopověstných kousků starého Reinecke, 1848
Homerowa Iliada, 1802
Na den narození neimocněišího, a neijasněišího cysare rímského,
téz dědičného rakauského a krále ceského, Frantiska II., w Praze
12. den mesyce Unora, léta 1805, 1805
Plody sborů učenců řeči českoslowanské prešporského, 1836
Rozprawy o gmenách, počátkách i starožitnostech národu
Slawského a geho kmeni /, 1830
Sokol, 1872
Základowé pitwy (Anatomie), čili, Soustawnj rozbor a popis těla
lidského a gednotliwých geho částek, 1840

39. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

40. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
2.Dutch
18th and 19th century books, newspapers, parliamentary papers
Provinciale Overijsselsche en Zwolsche courant : staats-, handels-, nieuws- en
advertentieblad, 1852-1852
Rechtsgeleerd advis in de zaak van den gewezen stadhouder, en over deszelfs
schryven aan de gouverneurs van de Oost- en West-Indische bezittingen van den
staat [...]. Ingelevert [...] op den 7 january 1796. / By B. Voorda et al, 1796-1796
Verhaal van het levensgevaar, waar in zig drie Rotterdamsche burgers [...]
bevonden hebben, te Utrecht, 1784-1784
Vrijmoedige aanmerkingen, over de uitsluiting van allen die door publieke
armkassen bedeeld worden, als stemgerechtigden [...] bij eene oproeping van het
Nederlandsche volk tot eene Nationaale Conventie, 1795-1795

41. Precision: 0.8432889410216431 , Recall: 0.843331934927516
IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

42. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

43. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
English
16th-19th century material
Sources for lexicon building: OED, ECCO

44. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

45. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
French
17th century books
Conduite du jugement naturel où tous les bons esprits de l'un et l'autre sexe
pourront facilement puiser la pureté de la science, par M. Jacques Forton, sieur de
S. Ange,..., 1653
Dissertation de la philosophie en général, 1668
La Dialectique du sieur de Launay, contenant l'art de raisonner juste sur toute sorte
de matières..., 1673
Lettre de M. Gadroys à M. de La Grange Trianon,... pour servir de réponse à celle
que M. de Castelet a écrite contre les raisons de M. Descartes touchant le flux et le
reflux de la mer. - Seconde lettre de M. Gadroys... [au même, sur le même sujet.],
1677
Traitez de métaphysique démontrée selon la méthode des géomètres. [Par le sieur
de La Coudraye.], 1693

46. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

47. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
German
Das Buch des heyligen Römischen Reichs unnderhalltunge, 1501
Die Poesie ihr Wesen und ihre Formen mit Grundzügen der vergleichenden
Literaturgeschichte, 1884
Echo Deß Hochzeitlichen Te Deum Laudamus, 1722
Ergebnisse der Erhebungen über die Beschäftigung gewerblicher Arbeiter an
Sonn- und Festtagen, Bd.:1, Gruppe I bis VII der Gewerbestatistik, Berlin, 1887,
1887
Quedlinburgisches Kreis-Tags-Memorial, 1673
Von der Regierung der Kirche und den unterschiedlichen Würden der
Geistlichkeit *(full title in comments), 1779
Warhaffter und grundlicher Bericht uß was Ursachen Martinus du Voysin (zu
Basel verburgerter Krämer) inn der Statt Surseew im Aargöw, ..., den 13. Tag
Octobris deß 1608. Jars erstlich enthauptet, und volgends verbrennt worden,
1609

48. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

49. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Polish
Adwersaria, albo terminata sprawy wojennej, która się toczyła w wołoskiej ziemi z
tureckim cesarzem, 1621
Chorągiew Sarmacka w Wołoszech, to jest pospolite ruszenie i szczęśliwy powrót
Polaków z Wołoch w roku 1621, 1621
Diariusz wiadomości od wyjazdu króla z Wilna do Smoleńska, 1610
Discurs o cenie pieniedzy teraznieyszey y o niektorych skutkach iey…, 1632
Nowe Ateny, albo Akademia wszelkiey scyencyi pełna, na różne tytuły iak na classes
podzielona, mądrym dla memoryału, idiotom dla nauki, politykom dla praktyki,
melancholikom dla rozrywki erygowana ... . Część 3 albo Supplement., 1746
Pasja żołnierzy obojga narodów w stolicy moskiewskiej krótko opisana, 1613
Powodzenia niebezpiecznego ale szczęśliwego wojska j. k. m. w Multanach opisanie,
1601
Relacja chwalebnej ekspedycji Jana Kazimierza, króla polskiego i szwedzkiego, 1650
Wyprawa i wyjazd sułtana Amurata, cesarza tureckiego, na wojnę do Korony Polskiej,
1634
Wyprawa i wyjazd sułtana Amurata, cesarza tureckiego, na wojnę do Korony
Polskiej_BW, 1634
Żałosne opisanie upadku króla hiszpańskiego na morzu i na lądzie, 1589

50. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

51. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Slovene
Genovefa, 1841
Gosp. Krištofa Šmida korarja avgustanskiga, zgodBe S. Pisma za
mlade ljud..., 1850
Kmetijske in rokodelske novice, 1844
Kratkozhasne uganke, 1788
Kuharske Bukve, 1799
Marianske Kempensar, ali Dvoje bukuvze, 1769
Novice kmetijskih, rokodelnih in narodskih reči, 1851
Sgodbe svetiga pisma za mlade ljudi, 1830
Ta male katechismus, 1768
Vezhna pratika od gospodarstva, 1789
Zerkviza na skali, 1855

52. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

53. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.
Retrieval demonstrator
Indexing and retrieval library (java) implemented on the lucene search engine
Lexicon in MySQL database
OCR with Finereader SDK and external dictionary interface of about 2000 images
of the Dutch Ground Truth selection
Page XML output [in framework]
NE tagging
Indexing and retrieval while using lexicon and NE tagging
IMPACT <Demo Day BL, 12 July 2011> 53

54. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

55. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

56. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

57. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

58. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

59. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

60. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

61. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

62. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

63. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

64. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.

65. IMPACT is supported by the European Community under the FP7 ICT Work Programme. The project is coordinated by the National Library of the Netherlands.