Training Tesseract 4.0 for Nepali Language

[Nirajan Pant]

The trainned data provided here is not giving good results with Nepali text image documents. It is unable to recognize some lines correctly. Can anybody help me in re-training Tesseract 4.0 for Nepali language.

[ShreeDevi Kumar]

Please provide sample of 'not giving good results' and samples of lines not being recognized correctly. Images and ground truth files will be helpful.

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

On Tue, May 9, 2017 at 12:16 PM, Nirajan Pant <nira...@gmail.com> wrote:

The trainned data provided here is not giving good results with Nepali text image documents. It is unable to recognize some lines correctly. Can anybody help me in re-training Tesseract 4.0 for Nepali language.

--
You received this message because you are subscribed to the Google Groups "tesseract-ocr" group.
To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.
To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.
To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/7761b739-6f6e-4343-9039-501f7c60782c%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[ShreeDevi Kumar]

see https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract-4.00 for info about training.

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

[Nirajan Pant]

Here is a sample image:

And the result is:

त्यसपछि कसरी उ इजरायल प्रवेश गर्यो,, घर बनायो ? जागीर खायो? उफ~~ सबै बिर्सिइयो , आफ्नै जीवनकथा सिलसिला मिलाएर
सम्हानसकोक्षमत्तापत्तिफ्लिअबउसमा|स्वारणशक्तिक्षीणहुदेंगएकोछ्दुकौंपन्निदुत्सकोस्पष्टहेक्कारह्दैन।


 


मन्दिर जाने बाटो र प्रार्थनाका एक दुइ ऋचा मन्त्रहरु बाहेक उसको सम्झनामा सबै कुरा अधुरा छन । दिनभरिको अधिकांश समय यिनै
कुरामा सिमित गर्दै आएको यो बुढो मान्छे संग कति खुसिका क्षणहरु होलान, कति संघर्ष वा दुखका कहानीहरु होलान ? म बारम्बार
सोध्ने यत्न गर्छु, उ मुस्काई मात्र रहन्छ ।


 


आज त त्यो मुस्कान पनि उसले बिर्से जस्तो छ, घरिघरि एक्लै बर्बराएको सुन्छु " हे भगवान, कति एक्लो जीवन !"


एक कप तातो कफी पिई सकेपछि बल्ल् अने मुखबाट उठेको बाफ पर पर फ्याक्दै उ प्रश्न गर्छ -
'म्झिचकोबिषयमाकतिलेखिइन्यग्यौत?पुस्तककहिलेतय1रहुनात्तिम्रो?"
किबुच एक प्रकारको सामुदायिक विकासको अवधारणा हो, इजरायलमा यसको उदाहरणीय र अनुकरणीय प्रयोग भएको छ |


"अहँ आधा पनि सकेको छैन, यस्ता खाले पुस्तकको हाम्रो देशमा खासै महत्व या उपयोगिता होला जस्तो पनि लाग्दैन । त्यसैले यी


अहिले त कथा पो लेखन थालेको छु, फेसबुकतिर टाँस्दिन्छु , एक दुइ जनाले पढ्छन पनि।"


 


 


मेरो नजीक आएर अन्छ उ, त्यसो भए आज के लेख्यौँ त, सुनाउन त ?

On Tuesday, 9 May 2017 12:54:31 UTC+5:45, shree wrote:

Please provide sample of 'not giving good results' and samples of lines not being recognized correctly. Images and ground truth files will be helpful.

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

On Tue, May 9, 2017 at 12:16 PM, Nirajan Pant <nira...@gmail.com> wrote:

The trainned data provided here is not giving good results with Nepali text image documents. It is unable to recognize some lines correctly. Can anybody help me in re-training Tesseract 4.0 for Nepali language.

--
You received this message because you are subscribed to the Google Groups "tesseract-ocr" group.

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-oc...@googlegroups.com.

[ShreeDevi Kumar]

Thanks. Please provide the 'ground truth' ie the original accurate text for the image.

Have tried to OCR the same image with options

--oem 1 --PSM 6 -l hin

Sometimes hindi traineddata gives better results.

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/57c5e038-da3b-4f94-82c4-791b858fbf42%40googlegroups.com.

[ShreeDevi Kumar]

Attached is the output I get with

tesseract nep_text_11.png nep_text_11 --oem 1 --psm 6 -l hin

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

[Nirajan Pant]

Yeah! I got the same result as yours with hin.traineddata which is better than nep.traineddata. I think the langdata need some revisions. I have attached the ground truth text for the image.

[ShreeDevi Kumar]

Please open an issue in langdata repo with any specific errors that you see for Nepali. Take a look at the wordlist and training_text,

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

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/da24a59a-b651-47a7-a599-df22d821da4c%40googlegroups.com.

[Nirajan Pant]

Thank you @shree. Can you help in how to generate langdata for training Tesseract 4.0?

[ShreeDevi Kumar]

see

https://github.com/tesseract-ocr/langdata/tree/master/nep

http://crubadan.org/languages/ne

https://ne.wikipedia.org/wiki/%E0%A4%AE%E0%A5%81%E0%A4%96%E0%A5%8D%E0%A4%AF_%E0%A4%AA%E0%A5%83%E0%A4%B7%E0%A5%8D%E0%A4%A0

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

To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscribe@googlegroups.com.

To post to this group, send email to tesser...@googlegroups.com.
Visit this group at https://groups.google.com/group/tesseract-ocr.

To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/c5cdd4f4-62c5-44fa-9ba0-558fcff375c2%40googlegroups.com.

[ShreeDevi Kumar]

make a collection of unicode devanagari fonts - look at fonts.google.com

make a large training text with nepali text

review and improve the wordlist in tesseract-ocr/langdata for nepali

I will share my modified training scripts, which use small sections of the large training text for each font. 

Please note that so far I have not had success in improving the accuracy of hindi traineddata with my experiments.

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