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Scanning in Acrobat results in hidden text that will not print

Explorer ,
May 17, 2020 May 17, 2020

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This is very strange. I have been using Acrobat Pro for many years to scan various personal and business documents. I have noticed that when I subsequently open some of the scanned PDF files, random blocks of the image (sometimes text, sometimes handwriting) appears to be missing. It turns out that Acrobat is turning these blocks into hidden text for some reason. I can see a thumbnail of the missing blocks if I use Examine Document > Hidden Text > Show Preview, but when I print the document, nothing I've tried can make these blocks print.

 

Here is an example. In the original document that I scanned directly into Acrobat, the top of the first column actually says "Date," and there are dates for every row. There is a handwritten "2019 Q1" at the bottom, just above the "2019 Q2":

Clipboard02.png

 The missing dates and handwritten section appear in red in the preview image under Examine Document > Hidden Text> Show Preview:

Capture.PNG

 

How do I make these invisible (but still saved) parts of my scans reappear, both on screen and when I print? How can I prevent parts of my scanned document becoming hidden in the first place? (My scans should be exact replicas of the original documents, with the addition of OCR data to make them searchable but with nothing removed.) Why is this happening, and why is it happening so randomly?

 

Thank you. As you can imagine, this is a most distressing discovery. I have years of financial and other documents with random parts missing.

TOPICS
Create PDFs , General troubleshooting , Scan documents and OCR

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Explorer ,
May 17, 2020 May 17, 2020

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One more example:

The original is a handritten column of two dates. The resulting PDF is on the left, with the top date missing. The preview from Examine Document > Hidden Text > Show Preview is on the right, with the top date in red (hidden) and the bottom date in blue (visible):

 

save.PNG

 

I also notice that if I drag the cursor over the area of the missing date, it selects it as if it were text. Copy-pasting from the area results in "4!o'/1Plt:t:," which I suppose is a poor OCR attempt at "4/01/2019:". So apparently the OCR engine thinks it recognizes random parts of the document as text, which is understandable and fine, but then it decides to hide those parts entirely, which is not fine.

 

Why does this happen? How can I stop it? What can I do to rescue so many old documents?

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Explorer ,
May 24, 2020 May 24, 2020

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Can nobody help with this?

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