OCRFeeder 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 Rochajrocha@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 problemsNo 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/Linuxapart 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

Whats 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 documentWhat works on detecting one, wont 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 bedivided 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 everythingand review the algorithms resultsSo, UI can work in attended and unattended waysCLI 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 itsdevelopment 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/OCRFeedergit:http://git.gnome.org/ocrfeederBugzilla:http://bugzilla.gnome.orgproduct: 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

OCRFeeder LinuxTag 2011

by Joaquim Rocha on May 18, 2011

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OCRFeeder LinuxTag 2011 — Presentation Transcript