OCRed page wrong in Xchange, good in Adobe

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bob_sun
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Posts: 166
Joined: Sat Jan 22, 2011 9:11 am

OCRed page wrong in Xchange, good in Adobe

Post by bob_sun »

Hello,

There is an OCRed document that can be viewed correctly in Adobe Acrobat but not in PDF Xchange Viewer.

I attached two types of tiles here
1. PDF: before and after OCR
2. PNG: screenshot of before and after OCR, and PDF-Xchange and Adobe comparison

The page contains an image of optical interference in a textbook, and although after OCR it is still shown correctly in Adobe, in PDF-Xchange viewer it is not correctly rendered and not viewable.

I also found that the page size has been significantly reduced after OCR:
Before: 2006KB
After: 445KB
What is happening here?

Could anyone help to examine the problem here?



Bob
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Stefan - PDF-XChange
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Joined: Mon Jan 12, 2009 8:07 am

Re: OCRed page wrong in Xchange, good in Adobe

Post by Stefan - PDF-XChange »

Hello bob_sun,

I will leave the first point in your post - the incorrectly rendered page after OCR for the devs to investigate, but the secont one for the file size is most probably due to the fact that ABBY have reduced either the quality or the DPI of the images compared to the original scan. You have provided us with two different pages for before and after, but I believe this is the case.

Best,
Stefan
bob_sun
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Posts: 166
Joined: Sat Jan 22, 2011 9:11 am

Re: OCRed page wrong in Xchange, good in Adobe

Post by bob_sun »

Dear Stefan,

I also believe ABBYY reduced size or resolution. I am looking forward to update on this.

Bob
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John - Tracker Supp
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Joined: Tue Jun 29, 2004 10:34 am

Re: OCRed page wrong in Xchange, good in Adobe

Post by John - Tracker Supp »

First thing Bob - your using Build 2.047 - we are now on build 2.5193 - which appears to render the page correctly please downlaod and install the latest release :

www.tracker-software.com/PDFXVwer.zip

Please advise if you concur.
If posting files to this forum - you must archive the files to a ZIP, RAR or 7z file or they will not be uploaded - thank you.

Best regards
Tracker Support
http://www.tracker-software.com
bob_sun
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Posts: 166
Joined: Sat Jan 22, 2011 9:11 am

Re: OCRed page wrong in Xchange, good in Adobe

Post by bob_sun »

John,

How do you know the version on my own computer?

Bob
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Stefan - PDF-XChange
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Re: OCRed page wrong in Xchange, good in Adobe

Post by Stefan - PDF-XChange »

Hi Bob,

In the document properties there is some information about the last application that modified this file. In our case we do include the version in this information field as well - so John could see it and tell that you have an older build.

Best,
Stefan