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Heavy Speckling

Share your software workflow. Write up your tips and tricks on how to scan, digitize, OCR, and bind ebooks.
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Hasher
Posts: 75
Joined: 26 Sep 2009, 03:05

Heavy Speckling

Post by Hasher » 11 May 2017, 03:39

Hi all

Been scanning in microfilm but some have very heavy speckling. Beside cleaning the film beforehand does anyone have any advice for removing this post process. I have tried scan tailor and this has reduced it marginally .



Here is an example
http://williams.aero/Pics/biton0001D06.tif

Thanks for any help
Paul

cday
Posts: 206
Joined: 19 Mar 2013, 14:55
Number of books owned: 0
Country: UK

Re: Heavy Speckling

Post by cday » 11 May 2017, 09:48

If you scan in grayscale (or colour) can the noise be reduced using a level adjustment?

Alternatively, does your scanner interface provide a way of adjusting the theshold at which the image is binarised?

Upload an example grayscale scan if you wish...

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