ocrfeeder - ocr made easy on gnome (guadec 2012)
DESCRIPTION
By Joaquim Rocha. Currently there are still a lot of documents still stored in paper format and this presents some problems related to preservation, flexibility and even ecology. With the current Free Software OCR engines it is possible to get a good accuracy rate when converting printed text to digital format but these engines only perform that basic conversion and know nothing about a document's structure and elements. OCRFeeder presents itself as an easy to use solution implemented for GNOME that performs automatic content detection in pages, allows manual correction and uses the system-wide OCR engines to convert the text. It allows to export the documents in various formats such as ODT, HTML or PDF. This project stands as the most complete Free Software solution for converting printed documents to digital formats and competes with the proprietary alternatives.TRANSCRIPT
static void_f_do_barnacle_install_properties(GObjectClass
*gobject_class){
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 */,
G_PARAM_READABLE | G_PARAM_WRITABLE |
G_PARAM_PRIVATE);
g_object_class_install_property (gobject_class,
F_DO_BARNACLE_PROP_CODE,
Joaquim [email protected]
OCRFeeder
OCR Made Easy on GNOME
July 27 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
What is it?
Document Analysis and Optical Character Recognition
for GNOME
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Why?
Paper has a number of problems
No applications for GNU/Linux to do a fair job
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Paper problems:Security
CC Photo by: http://www.flickr.com/photos/badwsky/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Paper problems:Preservation
CC Photo by: http://www.flickr.com/photos/98469445@N00/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Paper problems:Data processing
CC Photo by: http://www.flickr.com/photos/hugovk/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Paper problems:Ecology
CC Photo by: http://www.flickr.com/photos/pranavsingh/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Paper problems:Accessibility
CC Photo by: http://www.flickr.com/photos/illustrator/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
No fair conversion apps for GNU/Linux
apart from OCR engines, but...
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
OCR != Document Conversion
(it only deals with chars)(does not consider the layout)(does not distinguish contents)
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
What's needed is
Document Analysis and Recognition
(conversion of documents to an electronic format)
(first projects in the 80s)
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
How it works
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
So many layouts...
CC Photo by: http://www.flickr.com/photos/uber-tuber/
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Layouts vary with the type of document
What works on detecting one, won't work on others
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
OCRFeeder focuses on contents, not on layouts!
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
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 · GUADEC 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Recognition:
System-wide OCR engines are used
Engines are configured from the GUI or XML files
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Most known free OCR engines are detected and configured
automatically:
* Tesseract* GOCR
* OCRAD* Cuneiform
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Exportation formats:
ODTHTML
Plain textPDF
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
User interaction:
Users can edit everythingand 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 · GUADEC 2012
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Demo time!
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Other features:
* PDF importation* Unpaper preprocessor
* Font style edition* Image deskewing
* OCR results cleaning* Project saving/loading
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Future:
* More exportation formats: HOCR, etc.
* Make OCR engines' management easier
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Webpage:http://live.gnome.org/OCRFeeder
git:http://git.gnome.org/ocrfeeder
Bugzilla:http://bugzilla.gnome.orgproduct: OCRFeeder
Joaquim Rocha (Igalia) · OCRFeeder · GUADEC 2012
Thank you!