Debenu Quick PDF Library - PDF SDK Community Forum : How to delete unused images from PDF? http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 07 Mar 2026 09:39:05 +0000 Tue, 23 May 2006 14:01:05 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=418 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[How to delete unused images from PDF? : It&#039;s also possible to do...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1867.html#1867 Author: chicks
Subject: 418
Posted: 23 May 06 at 2:01PM

It's also possible to do this manually, if you're not shy about editing PDF files directly. You'll need the free pdftk tool.

Here's an example:

http://www.savefile.com/files.php?fid=1846963

1. Uncompress the original PDF using pdftk:
    pdftk png_example.pdf output step1.pdf uncompress

2. Edit step1.pdf (using commandline edit.exe):
    Find the object of interest, in this case 5 0 obj.
    Remove all references to this object by deleting the
    lines associated with it, including:
      /XOBJ7BC610 5 0 R
      /XOBJ7BC610 Do
      Everything between the line starting with 5 0 obj
      and endobj
    Save the edited file to step2.pdf.

3. The xref table in step2.pdf is now corrupt, so we need to fix it. We'll also recompress the PDF:

    pdftk step2.pdf output step3.pdf compress

The final file, step3.pdf, is now a valid, compressed PDF, without the unwanted image (we left the text description below the spot where the image was). We can now use QuickPDF to add a new image in its place.
]]> Tue, 23 May 2006 14:01:05 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1867.html#1867 <![CDATA[How to delete unused images from PDF? : I bought NitroPDF on sale at Fry&#039;s...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1854.html#1854 Author: chicks
Subject: 418
Posted: 20 May 06 at 3:37PM

I bought NitroPDF on sale at Fry's for $49 last week. Just tried removing an image from a sample PDF, works great! File size went from 132K to 58K.

Boxed version of NitroPDF was out of date, but updated for free with download version released just two days ago. Appears to work well so far...
]]> Sat, 20 May 2006 15:37:46 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1854.html#1854 <![CDATA[How to delete unused images from PDF? : Have you try an extractpages function...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1853.html#1853 Author: DELBEKE
Subject: 418
Posted: 20 May 06 at 3:05AM

Have you try an extractpages function after the replacement to create a new Pdf file ?]]> Sat, 20 May 2006 03:05:24 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1853.html#1853 <![CDATA[How to delete unused images from PDF? : reply to chicks: I allready tryed...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1852.html#1852 Author: james.si
Subject: 418
Posted: 20 May 06 at 2:41AM

reply to chicks: I allready tryed all those things, before I was writing to this forum. I am working on PDF compresion. I replace bmp pictures in PDF with JPG but I can't remove replaced pictures.]]> Sat, 20 May 2006 02:41:32 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1852.html#1852 <![CDATA[How to delete unused images from PDF? : Good to know. Meanwhile, here&#039;s...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1851.html#1851 Author: chicks
Subject: 418
Posted: 19 May 06 at 3:19PM

Good to know.

Meanwhile, here's a tool than definitely can remove images:

http://www.windjack.com/products/pdfcanopener.html

Unfortunately, it also requires Acrobat, so is pretty much out of my price range...
]]> Fri, 19 May 2006 15:19:56 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1851.html#1851 <![CDATA[How to delete unused images from PDF? : I’ve tried a number of things...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1850.html#1850 Author: swb1
Subject: 418
Posted: 19 May 06 at 3:10PM

I’ve tried a number of things to remove image streams from the PDF and I have not found the means within QuickPDF. I have traced the code and it looks to me as though replace image only replaces the reference to the stream not the stream object itself.  It does not look like it would be an enormous challenge to write a function capable of doing this however there may be ramifications of which I am unaware.

 

sb

]]> Fri, 19 May 2006 15:10:17 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1850.html#1850 <![CDATA[How to delete unused images from PDF? : Don&#039;t know for sure, but...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1849.html#1849 Author: chicks
Subject: 418
Posted: 19 May 06 at 2:41PM

Don't know for sure, but here are some things you might try:

FindImages() / ReplaceImage(). Might be able to replace a big unused image with a tiny one to save space.

DeleteLayer(). Might be able to delete a layer with images, assuming they are on a layer by themselves.

CheckObjects(). Documentation just says it checks all objects to see if they're valid. Doesn't say whether it removes invalid objects, but may be worth a try.

I'm still amazed at the number of functions in this library, and haven't used them all by any means.
]]> Fri, 19 May 2006 14:41:10 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1849.html#1849 <![CDATA[How to delete unused images from PDF? : Is there a possibility to delete...]]> http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1848.html#1848 Author: james.si
Subject: 418
Posted: 19 May 06 at 1:18PM

Is there a possibility to delete unused pictures (pictures that are not drawn) from PDF? Please help.]]> Fri, 19 May 2006 13:18:10 +0000 http://www.quickpdf.org/forum/how-to-delete-unused-images-from-pdf_topic418_post1848.html#1848