[image: KoreanOCRExample.PNG]
Hi all,
as a Tesseract/OCR newbie, I am currently working on deepening my
understanding of the Tesseract foundations and OCR basics.
This is why I came across the following strange results: When scanning some
Korean Wikipedia pages (related to mathematics),
pect it's still quite straightforward.
Best,
Nick
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hi shree
thanks for your reply. i will check it as soon as possible.
On Saturday, June 2, 2018 at 3:56:39 PM UTC+4:30, shree wrote:
>
> > !int_mode_:Error:Assert failed:in file weightmatrix.cpp, line 244
>
> You can only continue_from models in tessdata_best repo which are float
> models. The
hi
i tried to finetune eng.traineddata. in lstm training raised this error :
lstmtraining
--continue_from ./tesseract-4.0.0-beta.1.20180414/tessdata/eng.lstm
--traineddata ./tesseract-4.0.0-beta.1.20180414/tessdata/eng.traineddata
--max_iterations 400
--debug_interval 0
hi
Is possible make a new .traineddata for support two languages ? (arabic +
english)
HOW ?
thanks
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AD_LIMIT*
> (through: *pytesseract.pytesseract.OMP_NUM_THREADS = 3 *or
> *pytesseract.pytesseract.OMP_THREAD_LIMIT
> = 3*) no multi threading is happening.
>
>
>
> Den mån 28 maj 2018 kl 12:11 skrev nick >:
>
>> how and where we could change this variable ?
>>
>> --
>> You received thi
how and where we could change this variable ?
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I found OMP_THREAD_LIMIT but i don't know to change it to 20 ?!
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hi
I want to run tesseract on cpu with 20 cores. but tesseract uses a few core
when ocr a page !!!
how could i change the setting and force tesseract use all 20 cores ?!
thanks
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Hi Janpieter
could we speed up the testing process of tesseract with GPU ? is it
possible ?
On Friday, May 11, 2018 at 10:59:39 AM UTC+4:30, Janpieter Sollie wrote:
>
> Hi George,
>
> The OpenCL engine of tesseract is currently being renewed for improved
> accuracy. The part that you are
hi
how can i detect tables and images in the main image with tesseract ? is
this possible ?
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hi
how can we train the tesseract 4 beta, with our lines dataset?
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hi Zdenko
I run the basic example code of bellow :
#include
#include
int main()
{
char *outText;
tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
// Initialize tesseract-ocr with English, without specifying tessdata path
if (api->Init(NULL, "eng")) {
I solved that error.
but now , raised a new error:
Failed loading language 'eng'
>
> Tesseract couldn't load any languages!
>
> Could not initialize tesseract.
>
>
>
how could solve it ?
thanks
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error was :
Error in findFileFormatStream: failed to read first 12 bytes of file
>
> terminate called after throwing an instance of
> 'std::ios_base::failure[abi:cxx11]'
>
> what(): basic_filebuf::underflow error reading the file: iostream error
>
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hi
i want to run tesseract API python with bellow codes, but raised error:
import osimport ctypes
lang = "eng"
filename = "/usr/src/tesseract-ocr/phototest.tif"
libname = "/usr/local/lib64/libtesseract.so.3"TESSDATA_PREFIX =
os.environ.get('TESSDATA_PREFIX')if not TESSDATA_PREFIX:
hi, i want to run tesseract with this code :
#include
#include
int main()
{
char *outText;
tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
// Initialize tesseract-ocr with English, without specifying tessdata path
if (api->Init(NULL, "eng")) {
>
>
> ne 20. 5. 2018 o 8:00 nick <wcd...@gmail.com > napísal(a):
>
>> hi
>>
>> is there a way to extract the location of each components (lines) in the
>> image ?
>>
>> for example : in the attached images specified the location of each
>> c
is that true ? the only role of eng.wordlist is post processing ?
On Wednesday, March 28, 2018 at 11:29:11 AM UTC+4:30, notorio...@gmail.com
wrote:
>
> What is the exact role of the '(lang).wordlist'
>
>
> I have no idea (lang).wordlist??
>
> It can help tesseract 4.00 to process *postprocessing
this is my question too, Does anyone have an idea for this ?
On Friday, April 6, 2018 at 3:34:22 PM UTC+4:30, Mohit Jain wrote:
>
> I'd like to know if it's possible to use Tesseract OCR for automatically
> detecting figures, graphs or images which occur in the image? From
> reviewing the
essedit_char_whitelist=ABC...123...' on
the command line.
Nick
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orbidden? My
first thought in such a case would be a one-liner shell script that
executes tesseract for you. Any reason that wouldn't work either?
Nick
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simple, fast, and customisable way of building, and definitely works
correctly with -j12 or whatever I have thrown at it. Any feedback
would be very welcome indeed.
Nick
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languages in an image,
using a plus in the language argument (i.e. '-l eng+spa').
Hope that's helpful.
Nick
0. https://github.com/tesseract-ocr/langdata
1. https://github.com/tesseract-ocr/tessdata
2. https://en.wikipedia.org/wiki/Central_Tibetan_language
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On Tue, Nov 10, 2015 at 08:59:19AM -0800, Ryan Baumann wrote:
> Thanks for this, Nick. I'm just getting around to looking into moving my Latin
> training into the tesstrain.sh system and this is very helpful.
Great, I was planning to do that myself with your Latin training -
let me know
OK, I just made a first attempt at some documentation for
tesstrain.sh
https://github.com/nickjwhite/tesseract/wiki/tesstrain.sh
Any and all comments would be very welcome indeed.
Nick
On Sun, Nov 08, 2015 at 07:08:37PM +0530, Sriranga(83yrsold) wrote:
>
> [icon_10_ge] tmp-kan.
bit until I have the time to
explain everything more completely (should be able to do it sometime
this week).
Nick
0. clone it with the command 'git clone
http://ancientgreekocr.org/grctraining.git'
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interested?
Nick
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Just a note, all the .git URLs listed below are git repositories,
and there isn't a web interface to them on my server, so just clone
them directly like this:
git clone http://ancientgreekocr.org/mignetools.git
Nick
On Thu, Oct 29, 2015 at 06:23:21PM +, Nick White wrote:
> Hi
latest
version and see if it works for you?
Nick
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Can you give an example of something
that isn't working as you expect?
Nick
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ere--without-root
Note that if you don't have leptonica installed on the machine
you'll have to do that first.
Let us know if you have any troubles.
Nick
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stderr as
failing that should be something you can easily fix by changing the
behaviour of your java code.
Certainly compiling an older version of Tesseract (which, as Zdenko
says, has significantly worse OS X support) is not the correct way
to go.
Nick
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On Fri, Sep 11, 2015 at 12:13:02AM -0700, fsbo.cons...@gmail.com wrote:
> To anyone else who may run across this, it is because of the way C++ uses
> scope
> to optimize the code when it compiles. Things that are within the scope of the
> for loop will run faster than things that have larger
, they should give us details of why
not, and we can fix it. This is free software, we can do better than
providing 2 options that work some of the time - we can just fix
bugs ourselves.
Nick
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) are contained in the repositories listed at
http://ancientgreekocr.org/
Hope you're all well out there :)
Nick
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all non-ascii characters) in the digital 2nd edition OED,
which is probably a very good starting point for generating training
texts.
Nick
On Thu, Apr 23, 2015 at 01:32:12PM -0700, Tom Morris wrote:
Has anyone tackled training for the IPA since this initial query?
I'm considering using
On Fri, Aug 22, 2014 at 12:42:21PM -0700, Thomas Bruno wrote:
Is this common when training from text2image output?
APPLY_BOXES: boxfile line 5364/748 ((1488,893),(1532,6)): FAILURE! Couldn't
find a matching blob
FAIL!
Yes, there will be some of these. Check the proportion of failing to
On Wed, Aug 20, 2014 at 07:39:50PM -0700, SHEN Fei wrote:
hi Nick,
I'm trying to use tesseract in my mobile phone so the tessdata size is
critical.
Since I only care about very few fonts, it would be convenient if I could add/
remove a special font.
Maybe removing some dictionary files
like 'sh
autogen.sh', as you did), so you don't cd to a directory containing
malicious or weird programs and inadvertantly run them when you're
trying to run standard system programs.
Nick
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Hi Dovhani,
Does this happen with all images when using your training, or just
one?
Nick
On Thu, Aug 21, 2014 at 03:03:47AM -0700, Dovhani Foneworx wrote:
Hi guys, I have a problem, I have succesfully trained tesseract 3.03 in Ubunt
14.04 but when i run tesseract it is giving errors
In that case it must be a problem with your training data. Can you
let us know the exact commands you used to create it?
Alternatively, you could post a gdb backtrace, if you know how to do
that.
Nick
On Thu, Aug 21, 2014 at 04:19:40PM +0200, Dovhani Foneworx wrote:
Hi Nick, this happens
On Thu, Aug 21, 2014 at 11:29:09AM -0700, shree wrote:
zdenko,
the current problem also seems related to strtok_r
please see
http://stackoverflow.com/questions/12973750/
fatal-error-strtok-r-h-no-such-file-or-directory-while-compiling-tesseract-oc
not, not at the moment, at least. If you wanted to
look into the code, I think enough information is preserved that it
would be possible, but it would be a lot of work.
Why do you want to? Extra fonts don't degrade recognition to a
noticable extent, in my usage.
Nick
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new training
alongside the official eng.traineddata, and call it something else,
so you call tesseract like this:
tesseract -l eng+mycustomeng image.png outbase
Nick
0. See the training/text2image tool in the main code repository
1. https://groups.google.com/forum/#!topic/tesseract-dev
to the above technologies, and I highly value strong
documentation support.
Sounds good to me. unpaper and scantailor are nice, but everything
they do should be well covered by your choice of tools.
Nick
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it to
Tesseract, and it shouldn't mess with it.
Nick
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On Tue, Aug 12, 2014 at 12:58:23PM +0530, Shree Devi Kumar wrote:
On Tue, Aug 12, 2014 at 4:31 AM, testing1234
cory.hix...@gmail.com wrote:
Note.. Step 5 above the last command should be
sudo make install-langs
Nick, it maybe helpful to add/update instructions in wiki.
Cory
reusable ground truth data to
test Tesseract with. Are there programatic ways of getting at the
data, for example downloading all page images and corresponding text
that is marked as green, for a specific language / script?
Thanks for getting in touch!
Nick
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in the
dictionary.
Yes, that is exactly correct.
Traun Christopher, if you want to only have certain recognised
words printed, the only way to do it is to recognise everything,
then run a regex or some other script over the output afterwards.
Tesseract doesn't do that itself.
Nick
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, but more suggestive.
If you were using the API you could totally set only the pattern you
wanted, and only recognise the region you with the zone, and that
should work quite well. Give it a try if you have time, and let us
know how it works.
Nick
On Tue, Jul 29, 2014 at 01:27:10PM -0700, David
LD_LIBRARY_PATH=$HOME/svnocr/local/lib
export TESSDATA_PREFIX=$HOME/svnocr/local/share/tesseract-ocr
Nick
P.S. Hi again all, I'm back, after the recent silence.
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are
you wanting, and what are you getting?
Nick
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://code.google.com/p/tesseract-ocr/wiki/APIExample#Example_using_the_C-API_in_a_C_program
Compiling and running it is quite a standard affair across
platforms, nothing special is required to link to Tesseract.
Nick
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perfect in every way, you wonderful man. ;)
Nick
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Hi Fajar,
Looks like you should try binarising the image yourself prior to
handing it over to Tesseract.
Nick
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/22425545/stroke-width-transform-opencv-using-python
http://stackoverflow.com/questions/6199/stroke-width-transform-swt-implementation-python
Nick
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, and what it contains
Does that sound good to people? I'll take silence from the list to
mean that sounds perfect in every way, you wonderful man. ;)
Thanks, Nick. That's great. You should probably have separate sections for
training 3, 3.02, 3.03, 3.03.03 ...etc
On Wed, Jul 16, 2014 at 11:17:00PM -0700, Jing JC wrote:
I am going through Ray Smith's tutorial, and don't get it?
He means that as the co-ordinate system uses bottom left as the
origin, you will never get a minus number co-ordinate (as you could
if the origin was elsewhere).
--
You
On Thu, Jul 17, 2014 at 12:14:43AM -0700, Jing JC wrote:
The Ray's tutorial said the bounding box overlaps.
so when I modify the box inside JTessbox,
do I keep the overlapping boxes,
or
make the boxes non touching.
That's interesting, actually; I didn't realise Tesseract did
outlining
, so the most
significant bit is 1, all the others are zero; 1. Convert that
to hexadecimal and you get 10. b has isalpha and islower set, so it
is 00011.
Does that make sense to you?
Nick
On Mon, Jul 14, 2014 at 09:54:40PM -0700, Jing JC wrote:
The example given are:
; 10 Common 46
b
get better.
I'll reply to your other email soon.
Nick
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To post
understanding
of the codebase, but ultimately I have limited time and haven't got
around to it yet. Are there particular things you'd like
documentated, that I could start on?
Nick
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Sorry for the noise. I've looked into this more, and discovered more
:)
On Tue, Jul 15, 2014 at 10:54:06AM -0400, Nick White wrote:
On Mon, Jul 14, 2014 at 01:10:07PM -0700, Albrecht Hilker wrote:
When I download the traineddata files and extract the unicharset file from
them
I notice
, if you like:
https://code.google.com/p/tesseract-ocr/issues/detail?id=1219
Nick
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Hi,
On Tue, Jul 15, 2014 at 10:04:24AM -0700, Jing JC wrote:
yep yep.
Thanks a lot Nick.
I tried to cancel mu post last night.
but seems I can not get access to it after posted but before approved.
I tried to match the V2's example to V3's format.
I figured it out later
.
Oh, by the way, the Things I would NOT recommend working on is a
very old page (from 2010); I wouldn't take it too seriously...
Nick
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that Ubuntu would take it for their LTS release, and it could then
be updated later in Ubuntu (when 3.03 is actually released).
It's confusing, but such is life ;)
Nick
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I build the tesseract svn source code in win8, I used the
VS2013/Cygwin/MinGW to build this, all failed.
Hi, you need to give us more clues as to why it failed. What error
messages did you get?
what version of leptonica the newest svn use? 1.70 or 1.71?
Tesseract should work fine with
On Sun, Jul 13, 2014 at 06:38:11PM +0430, universal reseller wrote:
is google drive use tesseract 3.03 ?
It's -rc1, meaning release candidate 1. So it isn't an official
release, but rather a testing preview release, which should be to
what the final 3.03 will be.
i checked one english pdf
general purpose. So basically I just turned every pixel white that wasnt a
pixel that contained part of a letter, and when I send that to tesseract I get
flawless output with the language data I trained. Thanks so much for the
replies Paul and Nick, I learned a lot and it put me in the right direction
, but not if you don't explicitly state the -psm.
Nick
On Wed, Jul 09, 2014 at 04:17:47PM -0700, Alex Ryan wrote:
Paul, I havent gotten a chance to play around with that yet, but thanks for
linking that, I might very well have to go that route.
I am having a very confusing issue tho that Im hoping
Hi,
I haven't tried it, but quickly grepping around the source code
suggests setting the config variable crunch_include_numerals to
true might do the job.
Please let us know if that works.
Nick
On Wed, Jul 09, 2014 at 11:15:10PM -0700, Damien D wrote:
Hi everyone,
tesseract seems
of the training tools like this were
originally written for internal use by Google and do funky things
like depend on map-reduce, so have to be rewritten for us plebs ;))
Nick
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On Sat, Jul 05, 2014 at 03:34:05PM -0700, Albrecht Hilker wrote:
Hello zdenop
It is clear that you are not the right person to answer this question.
If YOU would ever have looked into the source code you have seen that these
values ARE in use (in version 3.03).
You're being pretty unfair on
here. It says g hardly ever rises above 43, whereas
9 can quite happily rise up to 66 (which looks like it roughly
corresponds to the baseline, given how many other characters are
about there). From that we can guess that 128 is the x-height, and
64 is roughly the baseline.
More anon.
Nick
this crash? If so, can you open a
bug in the issue tracker, attaching the training data and image file
that crash it?
Thanks,
Nick
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V
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/*
* Copyright 2014 Nick White nick.wh...@durham.ac.uk
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* http
On Wed, Jul 09, 2014 at 03:16:08AM -0700, Paul wrote:
How about using ImageJ (can be automated with macros) to create a better
binary
result of the image.
Thanks for mentioning this; I hadn't heard of it and it sounds very
useful. I added a link to the ImproveQuality wiki page.
Nick
On Wed, Jul 09, 2014 at 09:48:20AM -0700, Rani Yaroshinski wrote:
From the point of view of the performance measures of the OCR ?
I don't think anybody has figures on this. You could do some tests
yourself, and let us know the results.
I would guess that file size would be a bigger slowdown
On Wed, Jul 09, 2014 at 09:50:01AM -0700, Rani Yaroshinski wrote:
In order to improve the accuracy of the OCR results ?
Yes, it is, if you know more details about the images you'll be
using, so can do better than Tesseract's guesses.
See
out a more definitive answer. If you get there first, let me
know and I can update the TrainingTesseract3 page as appropriate.
Nick
0. git clone http://ancientgreekocr.org/grc.git
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to figure it out in short order.
Thanks a lot for bringing this up; as I said, it has been bothering
me, but I hadn't found the time to do anything much about it.
More soon!
Nick
0. git clone http://ancientgreekocr.org/grc.git
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#Image_processing
Nick
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On Fri, Jul 04, 2014 at 02:08:46AM -0700, Meenal Goyal wrote:
If you're sure that all the words you will encounter will be in the
dictionary this should help somewhat:
https://code.google.com/p/tesseract-ocr/wiki/FAQ#How_to_
increase_the_trust_in/strength_of_the_dictionary?
On Fri, Jul 04, 2014 at 02:15:52AM -0700, Iskander Sharipov wrote:
I need to create new tessdata language, which is very similar to russian in
charset.
Every time I try to do so by training tesseract on a box containing needed
letters I get new traineddata,
which actually can recognize new
/strength_of_the_dictionary?
Nick
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?
Nick
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Hi Elena,
Just a guess, but maybe this line:
api - SetSourceResolution(600);
is the source of your troubles? Tesseract from the command line
would have just been guessing it, and perhaps its guess, coupled
with its ideas about different sizes of fonts, were better than
yours?
Nick
That's a tough thing to preprocess. Take a look at this recent
thread on this list: question about training tesseract.
Nick
On Tue, Jul 01, 2014 at 11:48:07PM -0700, Meenal Goyal wrote:
Hi Nick,
I have read that post earlier and also tried to preprocess the image. This is
the input image
could build the development
code for Windows if you're so inclined. If you don't want to do
that, you'll have to wait for the release.
if not than can anyone say when Tesseract - ocr v 3.03 going to
release ?
No, we don't have a release date. Sorry.
Nick
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myprogram.cpp -g -Wall -I/home/nick/local/include/tesseract
-L/home/nick/local/lib -llept -ltesseract
Let us know if you need anything more. I'll probably add these examples to the
wiki soon, thanks for the prompt :)
Nick
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in the first
place. Check out this wiki page:
https://code.google.com/p/tesseract-ocr/wiki/ImproveQuality
If you want to send a specific example image to the mailing list, we
can try to offer more specific advice.
Nick
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of such words are: fiJfifilnlflfiflhu-«fifllfllfilfi , neefls» , oscxmwxufis etc.
Do you mean you want Tesseract to only match dictionary words, or
recognise, but not print, words that aren't in the dictionary?
Nick
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not sure.
Nick
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extra information you have to those bugs, to help the issues be
resolved sooner:
https://code.google.com/p/tesseract-ocr/issues/detail?id=899
https://code.google.com/p/tesseract-ocr/issues/detail?id=1220
Nick
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as possible, and only give Tesseract the image of the text. There
are other people who have done similar things on this list, I
recommend you look through the archives to find more information on
good ways of doing this.
Nick
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we can potentially improve things in the
future.
If they don't respond, instructions on training Tesseract are on the
wiki:
https://code.google.com/p/tesseract-ocr/wiki/TrainingTesseract3
Nick
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for an algorithm.
Search the list archives, this has been asked (and answered) several
times.
Nick
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the C-API, or the C++ API? Can you share an example of
the code you're using?
Thanks,
Nick
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