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IMPACT Interoperability and Evaluation Framework Clemens Neudecker, National Library of the Netherlands IMPACT Demo Day, British Library 12/11/11
OCR: A multitude of challenges… ,[object Object]
OCR: A multitude of challenges… ,[object Object],Example: historical variants of the Dutch word ‘wereld’ (world): 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 we ë led
And a multitude of solutions! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Main   requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Components I: IIF ,[object Object],[object Object],[object Object],[object Object]
Framework integration ,[object Object]
Workflow development ,[object Object],[object Object],[object Object],[object Object],[object Object]
Workflow management ,[object Object],[object Object],[object Object],[object Object]
Community ,[object Object],[object Object],[object Object],[object Object],[object Object]
Components II: Dataset ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dataset ,[object Object]
Evaluation features ,[object Object],[object Object],[object Object],[object Object]
The PAGE Format Framework ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Processing results or ground truth (e.g. binarisation, dewarping, page content)
Ground-Truthing Tools ,[object Object],[object Object],[object Object],[object Object],[object Object]
Profile ‘Full Text Recognition’ ,[object Object],Measure Weights Region Type Weights Merge Text Allowable Merge Image Split Graphic Allowable Split Chart Miss Table Partial Miss Separator Misclassification Maths False Detection Noise 1.5 1.0 2.0 2.0 1.0 1.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.5
Partial   Miss Miss Merge Measures – Segmentation Errors Split Ground Truth Segmentation Result Mis-classi-fication Paragraph Caption
OCR Accuracy
Thank you! Questions?

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BL Demo Day - July2011 - (9) IMPACT Interoperability and Evaluation Framework

  • 1. IMPACT Interoperability and Evaluation Framework Clemens Neudecker, National Library of the Netherlands IMPACT Demo Day, British Library 12/11/11
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  • 18. Partial Miss Miss Merge Measures – Segmentation Errors Split Ground Truth Segmentation Result Mis-classi-fication Paragraph Caption