Skip to main content
Shereif26625438eexs
Participant
Oct 16, 2022 7:53 PM UTC
Question

Prevent Redaction from Reducing File Size

Hi,

 

I want to redact and maintain full quality, how do I do this?

I need to perform some OCR after redaction, when the file shrinks the OCR doesn't do so well.

I tried unchecking "Save as optimize for Fast Web View"  No luck there.  File still gets shrunk automatically.  See screenshot below.

 

Whenever I redact the data, and hit Apply, the file size is automatically reduced.  I just want the data being redacted to be removed, but I want the quality to be the same.

 

 

Thank you! 🙂

    7 replies

    V5E7A
    Participant
    Sep 4, 2023 12:11 PM UTC

    If you "Apply redactions", turn-off "Sanitize and remove hidden information". This should prevent "Reducing PDF size". If you want to remove hidden information, do that manually later.

    Translate
      JR Boulay
      Community Expert
      JR BoulayCommunity Expert
      Community Expert
      Oct 17, 2022 12:18 PM UTC

      I am starting from a scanned PDF, btw.

      This is what causes recompression and/or downsampling since these are images and there is nothing vector.

      As Eric said, you should run the OCR before, using the "Editable text and Images" setting. You can also choose the sub-sampling threshold.

       

      Translate
      Acrobate du PDF, InDesigner et Photoshopographe
      Eric Dumas
      Community Expert
      Eric DumasCommunity Expert
      Community Expert
      Oct 17, 2022 8:56 AM UTC

      Did you try to run the OCR first?

      The 'Optimise for fast web view' seems to be a way to save a preview so the file saved in a way that the first page will open faster then start opening the next page, then the next... instead of waiting for the whole file to load and open all the pages at once. I never saw a major impact on the quality

      Translate
      Shereif26625438eexsAuthor
      Participant
      Oct 17, 2022 12:09 PM UTC

      That's interesting.  So, OCR the Doc first, then redact, then apply redactions.  I will give it a try.

       

      Thank you

      Translate
      JR Boulay
      Community Expert
      JR BoulayCommunity Expert
      Community Expert
      Oct 17, 2022 7:46 AM UTC

      You cannot remove objects from a document without reducing its size!

      Translate
      Acrobate du PDF, InDesigner et Photoshopographe
        Shereif26625438eexsAuthor
        Participant
        Oct 17, 2022 12:08 PM UTC

        Reducing size because there is less stuff makes sense, but try eliminating something tiny from a large doc and you will see what I mean.  The pdf is reduced in size and the quality of the unredacted items goes down.

         

        I am starting from a scanned PDF, btw.  

         

        Thank you

        Translate
        Terms & ConditionsAccessibility statement
        Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices