<s>
OCRFeeder	B-Language
is	O
an	O
optical	B-Application
character	I-Application
recognition	I-Application
suite	O
for	O
GNOME	B-Application
,	O
which	O
also	O
supports	O
virtually	O
any	O
command-line	B-Application
OCR	O
engine	O
,	O
such	O
as	O
CuneiForm	B-Language
,	O
GOCR	B-Language
,	O
Ocrad	B-Language
and	O
Tesseract	B-Language
.	O
</s>
<s>
OCRFeeder	B-Language
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
subject	O
to	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
version	O
3	O
or	O
later	O
.	O
</s>
<s>
It	O
is	O
available	O
for	O
Linux	B-Application
and	O
other	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
.	O
</s>
<s>
OCRFeeder	B-Language
was	O
started	O
as	O
a	O
master	O
's	O
thesis	O
in	O
computer	B-General_Concept
science	I-General_Concept
by	O
Joaquim	O
Rocha	O
,	O
who	O
was	O
later	O
hired	O
by	O
Igalia	O
,	O
S.L.	O
</s>
<s>
The	O
OCRFeeder	B-Language
project	O
was	O
initially	O
published	O
and	O
hosted	O
on	O
Google	B-Protocol
Code	I-Protocol
,	O
temporarily	O
used	O
Gitorious	B-Application
and	O
now	O
uses	O
the	O
GNOME	B-Application
infrastructure	O
.	O
</s>
<s>
Version	O
0.7	O
from	O
July	O
30	O
,	O
2010	O
brought	O
image	O
pre-processing	O
features	O
,	O
0.7.1	O
(	O
November	O
8	O
,	O
2010	O
)	O
enabled	O
for	O
scanner	O
access	O
from	O
within	O
OCRFeeder	B-Language
.	O
</s>
<s>
OCRFeeder	B-Language
has	O
a	O
simple	O
graphical	B-Application
user	I-Application
interface	I-Application
that	O
is	O
designed	O
to	O
the	O
GNOME	B-Application
Human	B-Application
Interface	I-Application
Guidelines	I-Application
.	O
</s>
<s>
It	O
performs	O
a	O
Document	B-Algorithm
Layout	I-Algorithm
Analysis	I-Algorithm
and	O
transfers	O
the	O
layout	O
to	O
capable	O
output	O
formats	O
.	O
</s>
<s>
It	O
can	O
use	O
virtually	O
any	O
command-line	B-Application
OCR	O
engine	O
as	O
back-end	O
and	O
features	O
auto-detection	O
and	O
auto-configuration	O
for	O
all	O
popular	O
free	O
engines	O
.	O
</s>
<s>
OCR	O
back-ends	O
may	O
be	O
either	O
auto-configured	O
,	O
the	O
necessary	O
command	B-Application
line	I-Application
entered	O
in	O
a	O
GUI	B-Application
dialogue	O
or	O
configured	O
directly	O
via	O
a	O
XML	B-Protocol
file	O
.	O
</s>
<s>
The	O
suite	O
also	O
includes	O
a	O
spell	B-Application
checker	I-Application
.	O
</s>
<s>
OCRFeeder	B-Language
has	O
built-in	O
procedures	O
for	O
the	O
post-processing	O
of	O
the	O
raw	O
OCR	O
results	O
returned	O
by	O
the	O
OCR	O
engine	O
.	O
</s>
<s>
Although	O
OCRFeeder	B-Language
is	O
a	O
GUI	B-Application
tool	O
,	O
it	O
can	O
also	O
run	O
in	O
command	B-Application
line	I-Application
mode	O
(	O
as	O
ocrfeeder-cli	O
)	O
,	O
which	O
may	O
be	O
a	O
useful	O
tool	O
for	O
automatic	O
document	O
batch	B-General_Concept
processing	I-General_Concept
.	O
</s>
<s>
In	O
this	O
mode	O
OCRFeeder	B-Language
uses	O
the	O
default	O
OCR	O
engine	O
,	O
which	O
the	O
user	O
can	O
set	O
in	O
the	O
application	O
's	O
preferences	O
.	O
</s>
<s>
The	O
program	O
is	O
written	O
in	O
Python	B-Language
and	O
uses	O
the	O
GTK+	B-Application
library	O
(	O
using	O
PyGTK	B-Language
)	O
.	O
</s>
<s>
It	O
acts	O
as	O
a	O
graphical	B-Application
front-end	B-General_Concept
for	O
other	O
existing	O
tools	O
.	O
</s>
<s>
For	O
example	O
,	O
it	O
does	O
not	O
make	O
actual	O
character	B-Application
recognition	I-Application
itself	O
,	O
but	O
uses	O
external	O
programs	O
such	O
as	O
an	O
“	O
OCR	O
engine	O
”	O
that	O
is	O
installed	O
on	O
the	O
system	O
.	O
</s>
<s>
It	O
can	O
automatically	O
detect	O
and	O
configure	O
CuneiForm	B-Language
,	O
GOCR	B-Language
,	O
Ocrad	B-Language
and	O
Tesseract	B-Language
as	O
backend	O
OCR	O
engines	O
.	O
</s>
<s>
Scanners	O
are	O
accessed	O
via	O
SANE	B-Application
.	O
</s>
<s>
For	O
post-processing	O
of	O
scanned	B-Application
images	I-Application
there	O
is	O
integration	O
of	O
the	O
command-line	B-Application
tool	I-Application
“	O
Unpaper	O
”	O
,	O
among	O
other	O
things	O
.	O
</s>
<s>
PDF	B-Application
files	I-Application
are	O
processed	O
using	O
Ghostscript	B-Language
in	O
the	O
backend	O
.	O
</s>
<s>
OCRFeeder	B-Language
can	O
import	O
data	O
from	O
PDF	B-Application
or	O
graphic	B-Algorithm
files	I-Algorithm
.	O
</s>
<s>
From	O
0.7.1a	O
version	O
it	O
supports	O
grabbing	O
images	O
directly	O
from	O
the	O
scanner	B-Application
device	I-Application
.	O
</s>
<s>
The	O
results	O
can	O
be	O
saved	O
in	O
HTML	B-Language
,	O
OpenDocument	B-Application
,	O
plain	O
text	O
or	O
PDF	B-Application
file	I-Application
formats	O
.	O
</s>
<s>
hOCR	B-General_Concept
file	O
output	O
is	O
also	O
planned	O
.	O
</s>
