OCR broken characters in images using Tessearact

harsha

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Nov 21, 2019, 11:38:19 AM11/21/19

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Hi ,

I am trying to OCR images and struggling with images like test1.png

after applying image processing, the best I could reach is test2.png to make tesseract give some related results

I have tried tesseract with all possible psm values on test2.png and the best result I could get is 27837 " with --psm 6
Is their a way I can improve my output on this kind of images . I have lots of them in my dataset.

Any help would be appreciated

Thanks

test1.png

test2.png

Shree Devi Kumar

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Nov 22, 2019, 12:17:32 AM11/22/19

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convert test1.png -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle miff:- | textcleaner -f 25 -o 10 - result.png
convert -units PixelsPerInch result.png -resample 300 result1.png
tesseract result1.png -
27627

uses textcleaner from http://www.fmwconcepts.com/imagemagick/index.php

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lucmaa

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Nov 23, 2019, 1:23:12 AM11/23/19

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Hi, shree

Why is the option -despeckle repeated so many times in the command convert?

On Friday, 22 November 2019 13:17:32 UTC+8, shree wrote:

convert test1.png -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle -despeckle miff:- | textcleaner -f 25 -o 10 - result.png
convert -units PixelsPerInch result.png -resample 300 result1.png
tesseract result1.png -
27627

uses textcleaner from http://www.fmwconcepts.com/imagemagick/index.php

On Thu, Nov 21, 2019 at 10:08 PM harsha <harsha1...@gmail.com> wrote:

Hi ,

I am trying to OCR images and struggling with images like test1.png

after applying image processing, the best I could reach is test2.png to make tesseract give some related results

I have tried tesseract with all possible psm values on test2.png and the best result I could get is 27837 " with --psm 6
Is their a way I can improve my output on this kind of images . I have lots of them in my dataset.
Any help would be appreciated

Thanks

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Shree Devi Kumar

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Nov 23, 2019, 1:43:13 AM11/23/19

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ref: https://imagemagick.org/discourse-server/viewtopic.php?t=33628#p154457

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