I need help - I can help - Compare 2 PDFs

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Compare 2 PDFs

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=844
Printed Date: 14 May 24 at 8:22AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Compare 2 PDFs

Posted By: jabaltie
Subject: Compare 2 PDFs
Date Posted: 20 Dec 07 at 11:40AM

I'm willing to migrate from QuickPDF to CutePDF.

Then, I want to compare the PDFs generated from both ones.

Say that I have generated a PDF , from a template, mixing my data, using QuickPDF. Then I generate PDF_ONE.

Then I do the same, by using CutePDF, generating PDF_TWO.

Now I want to compare PDF_ONE x PDF_TWO, in order to see if they're identical.

What could I do ?

I expect form fields to be flattened on both PDFs....

My intention is to detect, automatically, if there's some problem on any one of them...

Thanks !

Replies:

Posted By: swb1
Date Posted: 20 Dec 07 at 12:01PM

I don�t think it�s possible. The PDF specification is too wide open. I have seen many PDF�s that appear the same yet are constructed so differently that the only valid consideration is visual appearance & field input performance. A comparison of the PDF file contents is almost certainly going to vary from one producer to another.