Difference between revisions of "OCR text in DIP"

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(Created page with "Add OCR text files to DIP -Test ocr tools with client supplied sample data -Add open-source OCR tool to Archivematica -Add micro-service to OCR files in DIP -Add OCR files...")
 
 
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Add OCR text files to DIP
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[[Main Page]] > [[Development]] > [[:Category:Development documentation|Development documentation]] > OCR test in DIP
  
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-Test ocr tools with client supplied sample data
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<div style="padding: 10px 10px; border: 1px solid black; background-color: #F79086;">This page is no longer being maintained and may contain inaccurate information. Please see the [https://www.archivematica.org/docs/latest/ Archivematica documentation] for up-to-date information.</div><p>
  
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-Add open-source OCR tool to Archivematica
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[[Category:Feature requirements]]
  
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-Add micro-service to OCR files in DIP
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== Requirements ==
  
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-Add OCR files to DIP in "[DIP]/OCR files" directory
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See related issues:
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* #6257
  
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-Add configuration setting to admin tab to pre-select OCR
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===Add OCR text files to DIP and AIP===
  
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option
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*Add open-source OCR tool to Archivematica
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**[https://code.google.com/p/tesseract-ocr/ Tesseract] is the most actively developed; other open-source OCR is either moribund (Cuneiform, OCRopus) or released only sporadically without major improvements (OCRad, gOCR).
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**The actively-developed options are:
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***[https://code.google.com/p/tesseract-ocr/ Tesseract] - Very actively developed. Best accuracy of all the open-source options, good speed.
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***[http://www.gnu.org/software/ocrad/ OCRad] - Moderate-to-poor accuracy, excellent speed.
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***[http://jocr.sourceforge.net/ gOCR] - Poor accuracy, slow speed.
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**Tesseract appears to be the best solution in most cases. If speed was paramount and mediocre or poor accuracy would be acceptable, there might be an argument to use OCRad.
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*Add micro-service to OCR files in DIP (post-normalization)
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**Micro-service: Transcription
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**User choice Yes/No (default NO)
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*Add FPR purpose - Transcription - OCR first and only tool in that section
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*Add OCR files to DIP in "[DIP]/OCRfiles" directory
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*Run OCR on originals or preservation copies??
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*Add OCR files to AIP in "AIP/data/objects/metadata/OCRfiles"
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**METS file PREMIS event Transcription (add to PREMIS events) [[PREMIS_metadata:_events#Transcription]]
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**METS file : use text/ocr fileGrp in [[METS#.3CfileSec.3E]]
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</fileGrp>
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<fileGrp USE="text/ocr">
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      <file GROUPID="Group-67f7e276-0dd9-4b09-bb30-3589f3f3900e" ID="file-67f7e276-0dd9-4b09-bb30-3589f3f3900e">
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        <FLocat xlink:href="objects/jp2/25080603-b3ffc8c4-0db9-454d-8fb6-eb01e0c1b07f.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
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      </file>
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      <file GROUPID="Group-5e8d85a8-802c-413c-a198-7e45466dfb04" ID="file-5e8d85a8-802c-413c-a198-7e45466dfb04">
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        <FLocat xlink:href="objects/pdf/Glass_Hall-acffd9c8-f048-45d6-9ef5-10ca8a9d28ac.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
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      </file>
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      <file GROUPID="Group-dfb298bc-aa31-4054-918c-ba84e349e2fa" ID="file-dfb298bc-aa31-4054-918c-ba84e349e2fa">
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        <FLocat xlink:href="objects/tif/43845161-5cc7ad6e-28bd-493f-a0fb-9ad13dccfe43.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
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      </file>
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    </fileGrp>
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*Add configuration setting to administrative tab of the dashboard to pre-select OCR options

Latest revision as of 17:22, 11 February 2020

Main Page > Development > Development documentation > OCR test in DIP

This page is no longer being maintained and may contain inaccurate information. Please see the Archivematica documentation for up-to-date information.

Requirements[edit]

See related issues:

  • #6257

Add OCR text files to DIP and AIP[edit]

  • Add open-source OCR tool to Archivematica
    • Tesseract is the most actively developed; other open-source OCR is either moribund (Cuneiform, OCRopus) or released only sporadically without major improvements (OCRad, gOCR).
    • The actively-developed options are:
      • Tesseract - Very actively developed. Best accuracy of all the open-source options, good speed.
      • OCRad - Moderate-to-poor accuracy, excellent speed.
      • gOCR - Poor accuracy, slow speed.
    • Tesseract appears to be the best solution in most cases. If speed was paramount and mediocre or poor accuracy would be acceptable, there might be an argument to use OCRad.
  • Add micro-service to OCR files in DIP (post-normalization)
    • Micro-service: Transcription
    • User choice Yes/No (default NO)
  • Add FPR purpose - Transcription - OCR first and only tool in that section
  • Add OCR files to DIP in "[DIP]/OCRfiles" directory
  • Run OCR on originals or preservation copies??
  • Add OCR files to AIP in "AIP/data/objects/metadata/OCRfiles"

</fileGrp> 

<fileGrp USE="text/ocr">
     <file GROUPID="Group-67f7e276-0dd9-4b09-bb30-3589f3f3900e" ID="file-67f7e276-0dd9-4b09-bb30-3589f3f3900e">
       <FLocat xlink:href="objects/jp2/25080603-b3ffc8c4-0db9-454d-8fb6-eb01e0c1b07f.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
     </file>
     <file GROUPID="Group-5e8d85a8-802c-413c-a198-7e45466dfb04" ID="file-5e8d85a8-802c-413c-a198-7e45466dfb04">
       <FLocat xlink:href="objects/pdf/Glass_Hall-acffd9c8-f048-45d6-9ef5-10ca8a9d28ac.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
     </file>
     <file GROUPID="Group-dfb298bc-aa31-4054-918c-ba84e349e2fa" ID="file-dfb298bc-aa31-4054-918c-ba84e349e2fa">
       <FLocat xlink:href="objects/tif/43845161-5cc7ad6e-28bd-493f-a0fb-9ad13dccfe43.txt" LOCTYPE="OTHER" OTHERLOCTYPE="SYSTEM"/>
     </file>
   </fileGrp>
  • Add configuration setting to administrative tab of the dashboard to pre-select OCR options
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