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Posted to user@tika.apache.org by Christian Wolfe <ta...@gmail.com> on 2015/07/23 04:11:27 UTC
TesseractOCRParser on Linux
Hi folks,
It looks to me that TesseractOCRParser doesn't work on Linux unless the
Tesseract executable and the 'tessdata' folder are in the same location on
the filesystem. This makes sense in a Windows environment (where everything
is installed together by default), but in linux, package managers (*and*
source code installations) tend to split the files up across the filesystem.
I believe this could be alleviated by creating a second property in
TesseractOCRConfig that points to the 'tessdata' folder separately from the
Tesseract executable. That, or a bit of documentation that clarifies that
the files need to be together.
I would be more than willing to work on either solution, but only if the
team considered it worthwhile.
Anyway, thanks for making a great library, and for taking time to read this.
Re: TesseractOCRParser on Linux
Posted by Christian Wolfe <ta...@gmail.com>.
Like I said, it works fine for me if I do *not* specify the Tesseract path
in my Java program, in which case it uses the system environment variables
to find the Tesseract files (namely $PATH to find the executable, and
$TESSDATA_PREFIX to find the tessdata folder).
On Thu, Jul 23, 2015 at 2:23 PM, Nick Burch <ap...@gagravarr.org> wrote:
> On Wed, 22 Jul 2015, Christian Wolfe wrote:
>
>> It looks to me that TesseractOCRParser doesn't work on Linux unless the
>> Tesseract executable and the 'tessdata' folder are in the same location on
>> the filesystem. This makes sense in a Windows environment (where everything
>> is installed together by default), but in linux, package managers (*and*
>> source code installations) tend to split the files up across the filesystem.
>>
>
> I'm not sure that's correct as a blanket statement. I have tesseract
> installed on ubuntu 14.04, from packages, and it works just fine with Tika.
> The tesseract binary and data aren't in the same folders, and no additional
> parameters are needed
>
> I'm wondering what's different with your setup?
>
> Thanks
> Nick
>
Re: TesseractOCRParser on Linux
Posted by Nick Burch <ap...@gagravarr.org>.
On Wed, 22 Jul 2015, Christian Wolfe wrote:
> It looks to me that TesseractOCRParser doesn't work on Linux unless the
> Tesseract executable and the 'tessdata' folder are in the same location
> on the filesystem. This makes sense in a Windows environment (where
> everything is installed together by default), but in linux, package
> managers (*and* source code installations) tend to split the files up
> across the filesystem.
I'm not sure that's correct as a blanket statement. I have tesseract
installed on ubuntu 14.04, from packages, and it works just fine with
Tika. The tesseract binary and data aren't in the same folders, and no
additional parameters are needed
I'm wondering what's different with your setup?
Thanks
Nick
Re: TesseractOCRParser on Linux
Posted by Konstantin Gribov <gr...@gmail.com>.
Thank you for reporting this, it's definitely a bug.
Feel free to contribute by creating issue in JIRA and patch or pull request
on github as Chris suggested.
чт, 23 июля 2015 г. в 15:36, Christian Wolfe <ta...@gmail.com>:
> Hello Gribov,
>
> I built tesseract from source, and it installed binaries into
> /usr/local/bin, and tessdata into /usr/local/share/tessdata. It works fine
> when I run Tesseract commands straight from the command line.
>
> When I run it through Tika, I create a TesseractOCRConfig object, and set
> the Tesseract Path property to '/usr/local/bin'. This seems to trip things
> up in the following method in TesseractOCRParser:
>
> private void setEnv(TesseractOCRConfig config, ProcessBuilder pb) {
> if(!config.getTesseractPath().isEmpty()) {
> Map<String, String> env = pb.environment();
> env.put("TESSDATA_PREFIX", config.getTesseractPath());
> }
> }
>
> Which indicates that if you manually set the Tesseract path, it assumes
> that the executable and the tessdata folder will be located together, and
> if you *don't* set it, it will use the system default values. Sure enough,
> I ran my code without explicitly setting the path, and it worked.
>
> That's good to know, but there could be situations in which these files
> are installed to nonstandard paths, or a situation in which a user wants to
> manually set the path based on what OS they're running in.
>
>
>
> On Thu, Jul 23, 2015 at 5:17 AM, Konstantin Gribov <gr...@gmail.com>
> wrote:
>
>> Hi, Christian.
>>
>> I have tesseract binary in /usr/bin (which is in PATH), its data in
>> /usr/share/tessdata and ocr works fine in current Tika release.
>>
>> Does it fail if tessdata path properly configured when building tesseract
>> (default is $PREFIX/share/tessdata)? Or ocr fails only when tessdata is
>> placed in non-standard directory which requires start tesseract with
>> `/path/to/tesseract --tessdata-dir /path/to/tessdata ...` always?
>>
>> Providing explicit property for tessdata-dir shouldn't break anything if
>> its default would be empty string and `--tessdata-dir` argument wouldn't be
>> added to command line if it's empty.
>>
>>
>> чт, 23 июля 2015 г. в 7:42, Mattmann, Chris A (3980) <
>> chris.a.mattmann@jpl.nasa.gov>:
>>
>>> this would be a very welcome change, Christian. Please create a JIRA
>>> issue at:
>>>
>>> http://issues.apache.org/jira/browse/TIKA
>>>
>>> And update the wiki page here http://wiki.apache.org/tika/TikaOCR
>>>
>>> Would be happy for you to contribute via SVN and Jira/patch and/or
>>> from Github per here:
>>>
>>> http://github.com/apache/tika/#contributing
>>>
>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>> Chris Mattmann, Ph.D.
>>> Chief Architect
>>> Instrument Software and Science Data Systems Section (398)
>>> NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
>>> Office: 168-519, Mailstop: 168-527
>>> Email: chris.a.mattmann@nasa.gov
>>> WWW: http://sunset.usc.edu/~mattmann/
>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>> Adjunct Associate Professor, Computer Science Department
>>> University of Southern California, Los Angeles, CA 90089 USA
>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>>
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Christian Wolfe <ta...@gmail.com>
>>> Reply-To: "user@tika.apache.org" <us...@tika.apache.org>
>>> Date: Wednesday, July 22, 2015 at 7:11 PM
>>> To: "user@tika.apache.org" <us...@tika.apache.org>
>>> Subject: TesseractOCRParser on Linux
>>>
>>> >Hi folks,
>>> >
>>> >It looks to me that TesseractOCRParser doesn't work on Linux unless the
>>> >Tesseract executable and the 'tessdata' folder are in the same location
>>> >on the filesystem. This makes sense in a Windows environment
>>> > (where everything is installed together by default), but in linux,
>>> >package managers (*and* source code installations) tend to split the
>>> >files up across the filesystem.
>>> >
>>> >
>>> >I believe this could be alleviated by creating a second property in
>>> >TesseractOCRConfig that points to the 'tessdata' folder separately from
>>> >the Tesseract executable. That, or a bit of documentation
>>> > that clarifies that the files need to be together.
>>> >
>>> >
>>> >I would be more than willing to work on either solution, but only if the
>>> >team considered it worthwhile.
>>> >
>>> >
>>> >Anyway, thanks for making a great library, and for taking time to read
>>> >this.
>>> >
>>>
>>> --
>> Best regards,
>> Konstantin Gribov
>>
>
> --
Best regards,
Konstantin Gribov
Re: TesseractOCRParser on Linux
Posted by Christian Wolfe <ta...@gmail.com>.
Hello Gribov,
I built tesseract from source, and it installed binaries into
/usr/local/bin, and tessdata into /usr/local/share/tessdata. It works fine
when I run Tesseract commands straight from the command line.
When I run it through Tika, I create a TesseractOCRConfig object, and set
the Tesseract Path property to '/usr/local/bin'. This seems to trip things
up in the following method in TesseractOCRParser:
private void setEnv(TesseractOCRConfig config, ProcessBuilder pb) {
if(!config.getTesseractPath().isEmpty()) {
Map<String, String> env = pb.environment();
env.put("TESSDATA_PREFIX", config.getTesseractPath());
}
}
Which indicates that if you manually set the Tesseract path, it assumes
that the executable and the tessdata folder will be located together, and
if you *don't* set it, it will use the system default values. Sure enough,
I ran my code without explicitly setting the path, and it worked.
That's good to know, but there could be situations in which these files are
installed to nonstandard paths, or a situation in which a user wants to
manually set the path based on what OS they're running in.
On Thu, Jul 23, 2015 at 5:17 AM, Konstantin Gribov <gr...@gmail.com>
wrote:
> Hi, Christian.
>
> I have tesseract binary in /usr/bin (which is in PATH), its data in
> /usr/share/tessdata and ocr works fine in current Tika release.
>
> Does it fail if tessdata path properly configured when building tesseract
> (default is $PREFIX/share/tessdata)? Or ocr fails only when tessdata is
> placed in non-standard directory which requires start tesseract with
> `/path/to/tesseract --tessdata-dir /path/to/tessdata ...` always?
>
> Providing explicit property for tessdata-dir shouldn't break anything if
> its default would be empty string and `--tessdata-dir` argument wouldn't be
> added to command line if it's empty.
>
>
> чт, 23 июля 2015 г. в 7:42, Mattmann, Chris A (3980) <
> chris.a.mattmann@jpl.nasa.gov>:
>
>> this would be a very welcome change, Christian. Please create a JIRA
>> issue at:
>>
>> http://issues.apache.org/jira/browse/TIKA
>>
>> And update the wiki page here http://wiki.apache.org/tika/TikaOCR
>>
>> Would be happy for you to contribute via SVN and Jira/patch and/or
>> from Github per here:
>>
>> http://github.com/apache/tika/#contributing
>>
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>> Chris Mattmann, Ph.D.
>> Chief Architect
>> Instrument Software and Science Data Systems Section (398)
>> NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
>> Office: 168-519, Mailstop: 168-527
>> Email: chris.a.mattmann@nasa.gov
>> WWW: http://sunset.usc.edu/~mattmann/
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>> Adjunct Associate Professor, Computer Science Department
>> University of Southern California, Los Angeles, CA 90089 USA
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Christian Wolfe <ta...@gmail.com>
>> Reply-To: "user@tika.apache.org" <us...@tika.apache.org>
>> Date: Wednesday, July 22, 2015 at 7:11 PM
>> To: "user@tika.apache.org" <us...@tika.apache.org>
>> Subject: TesseractOCRParser on Linux
>>
>> >Hi folks,
>> >
>> >It looks to me that TesseractOCRParser doesn't work on Linux unless the
>> >Tesseract executable and the 'tessdata' folder are in the same location
>> >on the filesystem. This makes sense in a Windows environment
>> > (where everything is installed together by default), but in linux,
>> >package managers (*and* source code installations) tend to split the
>> >files up across the filesystem.
>> >
>> >
>> >I believe this could be alleviated by creating a second property in
>> >TesseractOCRConfig that points to the 'tessdata' folder separately from
>> >the Tesseract executable. That, or a bit of documentation
>> > that clarifies that the files need to be together.
>> >
>> >
>> >I would be more than willing to work on either solution, but only if the
>> >team considered it worthwhile.
>> >
>> >
>> >Anyway, thanks for making a great library, and for taking time to read
>> >this.
>> >
>>
>> --
> Best regards,
> Konstantin Gribov
>
Re: TesseractOCRParser on Linux
Posted by Konstantin Gribov <gr...@gmail.com>.
Hi, Christian.
I have tesseract binary in /usr/bin (which is in PATH), its data in
/usr/share/tessdata and ocr works fine in current Tika release.
Does it fail if tessdata path properly configured when building tesseract
(default is $PREFIX/share/tessdata)? Or ocr fails only when tessdata is
placed in non-standard directory which requires start tesseract with
`/path/to/tesseract --tessdata-dir /path/to/tessdata ...` always?
Providing explicit property for tessdata-dir shouldn't break anything if
its default would be empty string and `--tessdata-dir` argument wouldn't be
added to command line if it's empty.
чт, 23 июля 2015 г. в 7:42, Mattmann, Chris A (3980) <
chris.a.mattmann@jpl.nasa.gov>:
> this would be a very welcome change, Christian. Please create a JIRA
> issue at:
>
> http://issues.apache.org/jira/browse/TIKA
>
> And update the wiki page here http://wiki.apache.org/tika/TikaOCR
>
> Would be happy for you to contribute via SVN and Jira/patch and/or
> from Github per here:
>
> http://github.com/apache/tika/#contributing
>
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Chris Mattmann, Ph.D.
> Chief Architect
> Instrument Software and Science Data Systems Section (398)
> NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
> Office: 168-519, Mailstop: 168-527
> Email: chris.a.mattmann@nasa.gov
> WWW: http://sunset.usc.edu/~mattmann/
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Adjunct Associate Professor, Computer Science Department
> University of Southern California, Los Angeles, CA 90089 USA
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
>
>
>
> -----Original Message-----
> From: Christian Wolfe <ta...@gmail.com>
> Reply-To: "user@tika.apache.org" <us...@tika.apache.org>
> Date: Wednesday, July 22, 2015 at 7:11 PM
> To: "user@tika.apache.org" <us...@tika.apache.org>
> Subject: TesseractOCRParser on Linux
>
> >Hi folks,
> >
> >It looks to me that TesseractOCRParser doesn't work on Linux unless the
> >Tesseract executable and the 'tessdata' folder are in the same location
> >on the filesystem. This makes sense in a Windows environment
> > (where everything is installed together by default), but in linux,
> >package managers (*and* source code installations) tend to split the
> >files up across the filesystem.
> >
> >
> >I believe this could be alleviated by creating a second property in
> >TesseractOCRConfig that points to the 'tessdata' folder separately from
> >the Tesseract executable. That, or a bit of documentation
> > that clarifies that the files need to be together.
> >
> >
> >I would be more than willing to work on either solution, but only if the
> >team considered it worthwhile.
> >
> >
> >Anyway, thanks for making a great library, and for taking time to read
> >this.
> >
>
> --
Best regards,
Konstantin Gribov
Re: TesseractOCRParser on Linux
Posted by "Mattmann, Chris A (3980)" <ch...@jpl.nasa.gov>.
this would be a very welcome change, Christian. Please create a JIRA
issue at:
http://issues.apache.org/jira/browse/TIKA
And update the wiki page here http://wiki.apache.org/tika/TikaOCR
Would be happy for you to contribute via SVN and Jira/patch and/or
from Github per here:
http://github.com/apache/tika/#contributing
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Chris Mattmann, Ph.D.
Chief Architect
Instrument Software and Science Data Systems Section (398)
NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
Office: 168-519, Mailstop: 168-527
Email: chris.a.mattmann@nasa.gov
WWW: http://sunset.usc.edu/~mattmann/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adjunct Associate Professor, Computer Science Department
University of Southern California, Los Angeles, CA 90089 USA
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-----Original Message-----
From: Christian Wolfe <ta...@gmail.com>
Reply-To: "user@tika.apache.org" <us...@tika.apache.org>
Date: Wednesday, July 22, 2015 at 7:11 PM
To: "user@tika.apache.org" <us...@tika.apache.org>
Subject: TesseractOCRParser on Linux
>Hi folks,
>
>It looks to me that TesseractOCRParser doesn't work on Linux unless the
>Tesseract executable and the 'tessdata' folder are in the same location
>on the filesystem. This makes sense in a Windows environment
> (where everything is installed together by default), but in linux,
>package managers (*and* source code installations) tend to split the
>files up across the filesystem.
>
>
>I believe this could be alleviated by creating a second property in
>TesseractOCRConfig that points to the 'tessdata' folder separately from
>the Tesseract executable. That, or a bit of documentation
> that clarifies that the files need to be together.
>
>
>I would be more than willing to work on either solution, but only if the
>team considered it worthwhile.
>
>
>Anyway, thanks for making a great library, and for taking time to read
>this.
>