Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
IMPACT OCR in a nutshell Clemens Neudecker, National Library of the Netherlands IMPACT Demo Day, Biblioteca Nacional de Es...
OCR Process <ul><li>Binarisation </li></ul><ul><li>= transform greyscale or colour images to bitonal (b/w) </li></ul><ul><...
ABBYY FineReader <ul><li>Main OCR technology provider in IMPACT </li></ul><ul><li>OCR technologies experts since 30 years ...
Binarisation
Adaptive Binarisation Original scan Prev. binarization New binarization
IMPACT Binarisation <ul><li>Original </li></ul><ul><li>State of the Art </li></ul><ul><li>IMPACT </li></ul>
Segmentation Blocks/Regions Words Glyphs
IMPACT Segmentation example Pre-Impact FR Engine 9 FR Engine 10 Part of column was misclassified as image
IMPACT Segmentation example v. 9 v. 10 Linear word order errors
IMPACT Segmentation example v. 9 v. 10 Lost text
Fraktur recognition
Languages and Dictionaries <ul><li>Goal: </li></ul><ul><ul><li>Develop an interface so that external dictionaries can be ...
ALTO: New native export format <ul><li>Available since FRE 10 R2 </li></ul><ul><li>Supports most recent schema: ALTO v. 2....
Thank you! Questions?
Upcoming SlideShare
Loading in …5
×

Bne impact ocr_part1

782 views

Published on

Presentation introducing OCR general features in relation to IMPACT project presented by Clemens Neudecker during demo session held at the BNE 5th of October 2011.

Published in: Technology, Education
no profile picture user

  • Be the first to comment

  • Be the first to like this

Bne impact ocr_part1

  1. 1. IMPACT OCR in a nutshell Clemens Neudecker, National Library of the Netherlands IMPACT Demo Day, Biblioteca Nacional de España
  2. 2. OCR Process <ul><li>Binarisation </li></ul><ul><li>= transform greyscale or colour images to bitonal (b/w) </li></ul><ul><li>in order to separate foreground (text) from background </li></ul><ul><li>Segmentation </li></ul><ul><li>= detection of layout elements in hierarchical order </li></ul><ul><li>(blocks/regions, lines, words, glyphs) </li></ul><ul><li>Pattern Matching (Recognition) </li></ul><ul><li>= matching of character shapes with internal font database (classifiers) </li></ul>
  3. 3. ABBYY FineReader <ul><li>Main OCR technology provider in IMPACT </li></ul><ul><li>OCR technologies experts since 30 years </li></ul><ul><li>IMPACT uses FineReader Engine (SDK) </li></ul>
  4. 4. Binarisation
  5. 5. Adaptive Binarisation Original scan Prev. binarization New binarization
  6. 6. IMPACT Binarisation <ul><li>Original </li></ul><ul><li>State of the Art </li></ul><ul><li>IMPACT </li></ul>
  7. 7. Segmentation Blocks/Regions Words Glyphs
  8. 8. IMPACT Segmentation example Pre-Impact FR Engine 9 FR Engine 10 Part of column was misclassified as image
  9. 9. IMPACT Segmentation example v. 9 v. 10 Linear word order errors
  10. 10. IMPACT Segmentation example v. 9 v. 10 Lost text
  11. 11. Fraktur recognition
  12. 12. Languages and Dictionaries <ul><li>Goal: </li></ul><ul><ul><li>Develop an interface so that external dictionaries can be integrated into the FineReader Engine </li></ul></ul><ul><li>2008 - 2009: </li></ul><ul><ul><li>External Dictionary beta interface </li></ul></ul><ul><ul><li>Same quality as with internal dictionaries possible </li></ul></ul><ul><li>2010 - 2011: </li></ul><ul><ul><li>Make interface work reliably </li></ul></ul><ul><ul><li>Teach partners how to use it </li></ul></ul><ul><ul><li>Support for any language, any time period </li></ul></ul>
  13. 13. ALTO: New native export format <ul><li>Available since FRE 10 R2 </li></ul><ul><li>Supports most recent schema: ALTO v. 2.0 </li></ul><ul><li>Line coordinates available </li></ul>
  14. 14. Thank you! Questions?

×