PDF Conversion doesn't see hidden text

Bearbait · 02-18-2011, 01:13 PM

I've searched for what might be a really simple answer but couldn't find anything, so here goes:

I have a PDF that was created by scanning and OCR using Prime Recognition OCR software. When I try to convert it to ePub, all I get are the scanned images of the text, not text from the hidden text. I know the OCR worked because I can search the PDF, and I can copy text from it.

Is there a setting or preference that tells Calibre to use the hidden text for conversion rather than the image of the text?

user_none · 02-18-2011, 02:16 PM

no. that is not supported.

Bearbait · 02-18-2011, 02:29 PM

OK, but now I'm really confused ... I have used Calibre to convert PDF documents that I've downloaded from the web to ePub with no problems. They look just like ePub books I've purchased. I assumed those PDF files were created from scans of the original, but perhaps I'm missing something here.

How does one get the text from scanned document into ePub format?

user_none · 02-18-2011, 02:56 PM

Reading text under images in PDF is not supported by the PDF engine calibre uses. PDFs where the text is not an image but the actal text is supported.

02-18-2011, 01:13 PM	#1
Bearbait Junior Member Posts: 2 Karma: 10 Join Date: Feb 2011 Device: iPad	PDF Conversion doesn't see hidden text I've searched for what might be a really simple answer but couldn't find anything, so here goes: I have a PDF that was created by scanning and OCR using Prime Recognition OCR software. When I try to convert it to ePub, all I get are the scanned images of the text, not text from the hidden text. I know the OCR worked because I can search the PDF, and I can copy text from it. Is there a setting or preference that tells Calibre to use the hidden text for conversion rather than the image of the text?

02-18-2011, 02:29 PM	#3
Bearbait Junior Member Posts: 2 Karma: 10 Join Date: Feb 2011 Device: iPad	OK, but now I'm really confused ... I have used Calibre to convert PDF documents that I've downloaded from the web to ePub with no problems. They look just like ePub books I've purchased. I assumed those PDF files were created from scans of the original, but perhaps I'm missing something here. How does one get the text from scanned document into ePub format? Last edited by Bearbait; 02-18-2011 at 02:51 PM.

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02-18-2011, 02:16 PM	#2
user_none Sigil & calibre developer Posts: 2,488 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	no. that is not supported.

02-18-2011, 02:56 PM	#4
user_none Sigil & calibre developer Posts: 2,488 Karma: 1063785 Join Date: Jan 2009 Location: Florida, USA Device: Nook STR	Reading text under images in PDF is not supported by the PDF engine calibre uses. PDFs where the text is not an image but the actal text is supported.

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