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Create editable text from scanned PDFs

  Tags: Gadget
 Language Learning Forum : Learning Techniques, Methods & Strategies Post Reply
20 messages over 3 pages: 1 2 3 
Doitsujin
Diglot
Senior Member
Germany
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 Message 17 of 20
16 January 2012 at 9:25pm | IP Logged 
fiziwig wrote:
The OCR is build right into Acrobat Reader, so you don't need a separate program.

Unfortunately, this information is not correct. While the full version of Acrobat has a built-in OCR option, in Acrobat Reader, you can only select text if the document was processed with an OCR program or originated from a word processor/DTP software file.
You cannot select text in a .pdf file that contains text as images.
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fiziwig
Senior Member
United States
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Studies: Spanish

 
 Message 18 of 20
17 January 2012 at 5:19pm | IP Logged 
Hmmm. I didn't know that. I've only used it with some old Spanish textbooks from around 1910 that were scanned into Google books. It worked quite well with http://ia700306.us.archive.org/15/items/firstspanishcour00hi lluoft/firstspanishcour00hilluoft.pdf for example, and you can even highlight and copy/paste text right in the browser. These old textbooks are all images of pages.
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Doitsujin
Diglot
Senior Member
Germany
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 Message 19 of 20
17 January 2012 at 7:33pm | IP Logged 
fiziwig wrote:
Hmmm. I didn't know that. I've only used it with some old Spanish textbooks from around 1910 that were scanned into Google books. [...] These old textbooks are all images of pages.

They're pdfs with a text layer on top of the images, because Google processes all Google books with an OCR program. Luckily, the vast majority of older digitized textbooks available at archive.org have such as text layer. But some older textbooks found elsewhere on the Internet don't. I.e. don't expect Acrobat Reader to do the OCR for you in these cases.
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fiziwig
Senior Member
United States
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297 posts - 618 votes 
Speaks: English*
Studies: Spanish

 
 Message 20 of 20
18 January 2012 at 6:24am | IP Logged 
Doitsujin wrote:
fiziwig wrote:
Hmmm. I didn't know that. I've only used it with some old Spanish textbooks from around 1910 that were scanned into Google books. [...] These old textbooks are all images of pages.

They're pdfs with a text layer on top of the images, because Google processes all Google books with an OCR program. Luckily, the vast majority of older digitized textbooks available at archive.org have such as text layer. But some older textbooks found elsewhere on the Internet don't. I.e. don't expect Acrobat Reader to do the OCR for you in these cases.


I see. I was obviously misunderstanding what I was seeing when I selected text in those books. I didn't realize there was an extra step involved.


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