ImageEn Forum - Enhancement of scanned documents

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Enhancement of scanned documents

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Carlos Borrero

Colombia
4 Posts

Posted - Oct 15 2016 : 23:17:36

Hello Nigel:

I have several scanned documents with poor resolution, noise and lines, please, what filters or steps do you recommend to enhance images like the ones attached? OCR doesn't work with these images.

Kind regards,

Carlos Borrero

Carlos Borrero

xequte

38615 Posts

Posted - Oct 17 2016 : 18:36:17

Hi Carlos

I think it would be better if you used higher resolution scans.

Otherwise test the various color effects available using Image > Adjust Colors in the PhotoEn demo.

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com

Carlos Borrero

Colombia
4 Posts

Posted - Oct 17 2016 : 19:12:52

Hi Nigel:

Thank you for your help.

Unfortunately I'm receiving images that were scanned years ago and I don't have access to the originals.

So I have to exert myself to use the best ImageEn offers.

Is there a way to eliminate the line that goes from top to bottom on each image?

Any other advise, different from Image > Adjust, which I have been using and helps a lot?

Kind regards,

Carlos Borrero

Carlos Borrero

xequte

38615 Posts

Posted - Oct 17 2016 : 19:25:16

Hi Carlos

No, I don't know a good process to automatically remove such a line, unfortunately.

See also: http://www.imageen.com/ieforum/topic.asp?TOPIC_ID=2819

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com

xequte

38615 Posts

Posted - Nov 29 2016 : 14:54:03

For more advice on tidying images before OCR see:

https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com

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