Some spaces are not recognized

[Sumedhe Dissanayake]

Sometimes spaces between words are ignored when tesseract is used to recognize Sinhala text.

- The traineddata from tesseract does not have a spacing problem, even though there ware changes in tesseract since it was uploaded.

- The spacing problem occurs regardless of whether I start the training from scratch or bootstrap with the traineddata from tesseract.

- The spacing problem gets worse with more training.

- Adding more space between the words during training does not make a difference.

- Adding double space between the words during recognition solves the problem.

- The spacing problem is not consistent, i.e. in the recognition of a text only some of the inter-word spaces are ignored (could not figure out any logic as to when it happens).

I have attached a screenshot, comparing a sample of input and output text.

Words missing spaces are underlined.

[ShreeDevi Kumar]

image is not visible.

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

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[Sumedhe Dissanayake]

On Friday, May 18, 2018 at 6:32:44 PM UTC+5:30, shree wrote:

image is not visible.

ShreeDevi
____________________________________________________________
भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Fri, May 18, 2018 at 5:39 PM, Sumedhe Dissanayake <sumedhedi...@gmail.com> wrote:

Sometimes spaces between words are ignored when tesseract is used to recognize Sinhala text.

- The traineddata from tesseract does not have a spacing problem, even though there ware changes in tesseract since it was uploaded.

- The spacing problem occurs regardless of whether I start the training from scratch or bootstrap with the traineddata from tesseract.

- The spacing problem gets worse with more training.

- Adding more space between the words during training does not make a difference.

- Adding double space between the words during recognition solves the problem.

- The spacing problem is not consistent, i.e. in the recognition of a text only some of the inter-word spaces are ignored (could not figure out any logic as to when it happens).

I have attached a screenshot, comparing a sample of input and output text.

Words missing spaces are underlined.

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[ShreeDevi Kumar]

>The traineddata from tesseract does not have a spacing problem, 

Then the problem is related to training.

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[ShreeDevi Kumar]

set the config variable - "preserve_interword_spaces" to 1

And as 0

For diff runs

and see if that makes any difference

[neet k]

Using Tesseract to recognize Text from images. The spaces between words are ignored for Punjabi text.

Library : Tess-Two

Platform : Android

How i can fix the problem related to spaces. Hereby, attaching a screenshot, input and output text.

Regards

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[Shree Devi Kumar]

I am not sure what version of tesseract and traineddata file you are using. It works fine with latest code and traineddata files from all three tessdata repos.

ubuntu@tesseract-ocr:~/TEST$ tesseract pan.png - -l pan --tessdata-dir ~/tessdata --psm 6 --oem 1
Warning: Invalid resolution 0 dpi. Using 70 instead.
ਖੀ ਜ਼ਿੰਦਗੀ ਦਾ
ਤੋਂ ਵੱਡਾ ਗੁਣ
ubuntu@tesseract-ocr:~/TEST$ tesseract pan.png - -l pan --tessdata-dir ~/tessdata_best --psm 6 --oem 1
Warning: Invalid resolution 0 dpi. Using 70 instead.
ਖੀ ਜ਼ਿੰਦਗੀ ਦਾ
ਤੋਂ ਵੱਡਾ ਗੁਣ
ubuntu@tesseract-ocr:~/TEST$ tesseract pan.png - -l pan --tessdata-dir ~/tessdata_fast --psm 6 --oem 1
Warning: Invalid resolution 0 dpi. Using 70 instead.
ਖੀ ਜ਼ਿੰਦਗੀ ਦਾ
ਤੋਂ ਵੱਡਾ ਗੁਣ
ubuntu@tesseract-ocr:~/TEST$

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[neet k]

Sir, 

I want to develop Android Application for same so i am using Android Platform. 

Firstly, As per sources i found that to integrate Tesseract to android Tess-two Library (A fork of Tesseract Tools for Android) is available https://github.com/rmtheis/tess-two . Further,  Tess-Two Library works with: Tesseract 3.05, Leptonica 1.74.1 , Traineddata file: https://github.com/tesseract-ocr/tessdata/tree/3.04.00.

Secondly, Yes i have Learned from your Previous Discussions that this problem is fixed in Tesseract 4.0. But i am not finding any help to use tesseract 4.0 for Android. Please provide sources and help for same.

Regards, 

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