The is definitely tesseract api configs for that :
textord_heavy_nr = 0 (0 default, 1 is *very* aggressive)
textord_max_noise_size

However I would simply use opencv to remove any blob with a vertical height 
of less than desired. 


On Monday, December 14, 2015 at 9:42:29 PM UTC+8, Filippo Riccio wrote:
>
> Hallo everybody,
>
> I am testing Tesseract to recognize the characters in the attached Picture.
>
> I created a traineddata with a small number of characters.
>
> My Problem is that Tesseract recognizes as character also the small lines 
> at the left of the first 0 and
> under J. Precisely, the recognized text is F0002HNJH2UF
>
> How can I avoid it? It is possible to fix the minimal size of characters?
>
> Thank you in advance.
>
>
>

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