OCRFeeder LinuxTag 2011

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The slides for the presentation about OCRFeeder given at LinuxTag 2011.

$static void _f_do_barnacle_install_properties(GObjectClass *gobject_class) { OCRFeeder GParamSpec *pspec; /* Party code attribute */ pspec = g_param_spec_uint64 (F_DO_BARNACLE_CODE, "Barnacle code.", "Barnacle code", 0, G_MAXUINT64, G_MAXUINT64 /* default value */, Converting printed documents into G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_PRIVATE); digital formats g_object_class_install_property (gobject_class, F_DO_BARNACLE_PROP_CODE, Joaquim Rocha jrocha@igalia.com Berlin, May 2011$

What is it?

Document Analysis and Optical
Character Recognition
for GNOME

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Why?

Paper has a number of problems

No applications for GNU/Linux to do
a fair job

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Paper problems:
Security

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011
CC Photo by: http://www.flickr.com/photos/badwsky/

Paper problems:
Preservation

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011
CC Photo by: http://www.flickr.com/photos/98469445@N00/

Paper problems:
Data processing

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011
CC Photo by: http://www.flickr.com/photos/hugovk/

Paper problems:
Ecology

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011
CC Photo by: http://www.flickr.com/photos/pranavsingh/

No fair conversion apps for
GNU/Linux

apart from OCR engines, but...

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

OCR != Document Conversion

(it only deals with chars)
(does not consider the layout)
(does not distinguish contents)

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

What's needed is

Document Analysis and
Recognition

(conversion of documents to an
electronic format)
(first projects in the 80s)
Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Where are were we at?

* Some closed solutions
* Only for proprietary systems
* Various prices
* still... arguable results

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

How

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

So many layouts...

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011
CC Photo by: http://www.flickr.com/photos/uber-tuber/

Layouts vary with the type of
document

What works on detecting one, won't
work on others

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

OCRFeeder focuses on contents,
not on layouts!

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Key concept:

If a document image can be
divided in windows of 1 (content)
or 0 (not content),
then it is possible to group all the
1s and outline the contents

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Recognition:

System-wide OCR engines are used

Engines are configured from the
GUI or XML files

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Most known free OCR engines are
detected and configured
automatically:

* Tesseract
* GOCR
* OCRAD
* Cuneiform
Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Exportation formats:

ODT
HTML
Plain text

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

User interaction:

Users can edit everything
and review the algorithm's results

So, UI can work in attended and
unattended ways
CLI only works in an unattended
mode
Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Demo time!

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Other features:

* PDF importation
* Unpaper preprocessor
* Font style edition
* Image deskewing
* OCR results cleaning
* Project saving/loading
Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

A11y:

* OCRFeeder is a very useful tool
for visually impaired users
* Last year, the main target of its
development was to improve a11y

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Future:

* Integrate Ocropus as an
alternative analysis backend
* More exportation formats: HOCR,
PDF, etc.
* Make OCR engines' management
easier
Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Webpage:
http://live.gnome.org/OCRFeeder

git:
http://git.gnome.org/ocrfeeder

Bugzilla:
http://bugzilla.gnome.org
product: OCRFeeder

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Manual in German:

http://wiki.ubuntuusers.de/OCRFeeder

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

Thank you!

Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

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OCRFeeder LinuxTag 2011

1. static void _f_do_barnacle_install_properties(GObjectClass *gobject_class) { OCRFeeder GParamSpec *pspec; /* Party code attribute */ pspec = g_param_spec_uint64 (F_DO_BARNACLE_CODE, "Barnacle code.", "Barnacle code", 0, G_MAXUINT64, G_MAXUINT64 /* default value */, Converting printed documents into G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_PRIVATE); digital formats g_object_class_install_property (gobject_class, F_DO_BARNACLE_PROP_CODE, Joaquim Rocha jrocha@igalia.com Berlin, May 2011

2. What is it? Document Analysis and Optical Character Recognition for GNOME Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

3. Why? Paper has a number of problems No applications for GNU/Linux to do a fair job Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

4. Paper problems: Security Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011 CC Photo by: http://www.flickr.com/photos/badwsky/

5. Paper problems: Preservation Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011 CC Photo by: http://www.flickr.com/photos/98469445@N00/

6. Paper problems: Data processing Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011 CC Photo by: http://www.flickr.com/photos/hugovk/

7. Paper problems: Ecology Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011 CC Photo by: http://www.flickr.com/photos/pranavsingh/

8. No fair conversion apps for GNU/Linux apart from OCR engines, but... Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

9. OCR != Document Conversion (it only deals with chars) (does not consider the layout) (does not distinguish contents) Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

10. What's needed is Document Analysis and Recognition (conversion of documents to an electronic format) (first projects in the 80s) Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

11. Where are were we at? * Some closed solutions * Only for proprietary systems * Various prices * still... arguable results Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

12. How Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

13. So many layouts... Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011 CC Photo by: http://www.flickr.com/photos/uber-tuber/

14. Layouts vary with the type of document What works on detecting one, won't work on others Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

15. OCRFeeder focuses on contents, not on layouts! Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

16. Key concept: If a document image can be divided in windows of 1 (content) or 0 (not content), then it is possible to group all the 1s and outline the contents Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

17. Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

18. Recognition: System-wide OCR engines are used Engines are configured from the GUI or XML files Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

19. Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

20. Most known free OCR engines are detected and configured automatically: * Tesseract * GOCR * OCRAD * Cuneiform Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

21. Exportation formats: ODT HTML Plain text Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

22. User interaction: Users can edit everything and review the algorithm's results So, UI can work in attended and unattended ways CLI only works in an unattended mode Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

23. Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

24. Demo time! Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

25. Other features: * PDF importation * Unpaper preprocessor * Font style edition * Image deskewing * OCR results cleaning * Project saving/loading Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

26. A11y: * OCRFeeder is a very useful tool for visually impaired users * Last year, the main target of its development was to improve a11y Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

27. Future: * Integrate Ocropus as an alternative analysis backend * More exportation formats: HOCR, PDF, etc. * Make OCR engines' management easier Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

28. Webpage: http://live.gnome.org/OCRFeeder git: http://git.gnome.org/ocrfeeder Bugzilla: http://bugzilla.gnome.org product: OCRFeeder Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

29. Manual in German: http://wiki.ubuntuusers.de/OCRFeeder Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

30. Thank you! Joaquim Rocha (Igalia) · OCRFeeder · LinuxTag 2011

OCRFeeder LinuxTag 2011

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