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Old 02-17-2009, 12:35 PM   #1
mtravellerh
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OCR-Software für altdeutsche Schrift

Ich möchte hier mal eine Aufruf starten, vielleicht hab ich ja Glück.

Also: Ich habe sämtliche Abenteuer des Detektiv Nobody in altdeutscher Schrift(PDF). Ich weiss. dass es von Abbyy OCR-Software gibt, die diese Schrift lesen kann, aber ich kann sie mir leider nicht leisten. Daher möchte ich gerne wissen, ob jemand diese Software hat und die PDFs durchlaufen lassen könnte (zu HTML oder TXT) Ich würde das K-Lesen übernehmen. Bitte per PM melden ode hier rein schreiben.

Falls ich niemanden finde, muss ich wohl oder übel den ganzen Text abschreiben und das wär nun wirklich sehr aufwändig.

Danke im Voraus

MTH
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Old 02-18-2009, 04:33 AM   #2
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Vom Finereader 9 gibt's eine demo-Version.

Sie läßt sich soweit ich weiß 15 Tage nutzen und verarbeitet bis zu 50 Seiten auf einmal.

Wenn du das Ergebnis danach in HTML (oder andere Formate) exportierst (und eventuell zusammensetzt) sollte es Dir viel Zeit sparen.
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Old 02-18-2009, 03:23 PM   #3
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Danke. Ich werd das mal probieren.
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Old 02-18-2009, 05:10 PM   #4
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Tesseract ist Open Source und hat Unterstützung und Trainingsdaten sowohl für moderne deutsche Schrift als auch für die Frakturschrift:
Habs noch nicht getestet, werde das aber jetzt machen, da ich ebenfalls Bedarf am OCR von Frakturschrift habe. Wahrscheinlich werden die Ergebnisse aber schlechter wie bei Finereader & Co sein...umständlicher ist es allemal.
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Old 02-18-2009, 06:42 PM   #5
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Habe es mit 2 verschiedenen Büchern, welche unterschiedliche Frakturschriftarten benutzen mal getestet und war ganz positiv überrascht. Naja, so positiv wie man bei einem kostenlosen OCR und dann noch mit Frakturschrift halt sein kann.

Zuerst muss man die PDF-Inhalte als tif-Grafiken bekommen, dann kann man Tesseract via
Quote:
tesseract test\nobody05_pic0005.tif testout\05 -l deu-f
damit füttern.

Anbei mal die Resultate der ersten zwei Seiten vom Detektiv Nobody 5.
Das Ergebnis der ersten Seite ist aufgrund des Drop-Cap am ersten Absatz natürlich zwangsläufig nicht so gut. Die zweite Seite sieht besser aus.

Keine Ahnung wie sich der Finereader da schlägt - vielleicht kann ja mal jemand einen Vergleich posten...
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File Type: txt 05.txt (1.8 KB, 340 views)
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Old 02-18-2009, 07:21 PM   #6
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In dem Fall solltet Ihr mal das testen: http://www.frakturschrift.de/

Der gewöhnliche Finereader bräuchte auch eine Musterdatei um brauchbare Ergebnisse zu liefern, die sollten hier schon dabei sein.
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Old 02-19-2009, 03:43 AM   #7
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Quote:
Originally Posted by netseeker View Post
Habe es mit 2 verschiedenen Büchern, welche unterschiedliche Frakturschriftarten benutzen mal getestet und war ganz positiv überrascht. Naja, so positiv wie man bei einem kostenlosen OCR und dann noch mit Frakturschrift halt sein kann.

Zuerst muss man die PDF-Inhalte als tif-Grafiken bekommen, dann kann man Tesseract via

damit füttern.

Anbei mal die Resultate der ersten zwei Seiten vom Detektiv Nobody 5.
Das Ergebnis der ersten Seite ist aufgrund des Drop-Cap am ersten Absatz natürlich zwangsläufig nicht so gut. Die zweite Seite sieht besser aus.

Keine Ahnung wie sich der Finereader da schlägt - vielleicht kann ja mal jemand einen Vergleich posten...
Also ich find das Resultat richtig gut. Mit ein bisserl Training müsste das doch zu machen sein! Danke netseeker. Karma für Dich!
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Old 02-19-2009, 09:13 AM   #8
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Beim Trainieren von Tesseract hilft unter Windows JTesseract, eine überraschend komfortable GUI, ungemein...
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Old 02-19-2009, 12:36 PM   #9
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Danke nochmal. Bin schon fleissig am OCRen (oder wie immer das heisst). Funktioniert überraschend gut!
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Old 02-19-2009, 02:29 PM   #10
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optical character recognition = optische Zeichenerkennung
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