Coincidentally I downloaded and tried using this just a while ago. I was trying to see if it can identify an Elsevier fingerprint between two pdfs. It can't, it only compares visible things.
I used vbindiff instead.
Diff-pdf: tool to visually compare two PDFs
31–40 of 85 posts
Re: Diff-pdf: tool to visually compare two PDFs
#32I wrote a pixel-based visual diffing algorithm long ago that was intended for a CI tool that finds all of the UI changes in a PR. I broke the layout of a page I didn’t even know existed as an intern at Inkling and have had this idea in my head ever since.
Re: Diff-pdf: tool to visually compare two PDFs
#33I created a similar in-browser version a while back with mozilla's pdf-js. The diff rendering is all run client side.
The diff-pdf project was my inspiration but I wanted to create a version that was distributable to non-programmers.
Re: Diff-pdf: tool to visually compare two PDFs
#34Can anyone recommend a method to deduplicate pdfs? The hash is often different but the content and meta data is 99.99% the same.
Re: Diff-pdf: tool to visually compare two PDFs
#35You can do this with Beyond Compare (it's not free, but not very expensive either)
https://www.scootersoftware.com/
Re: Diff-pdf: tool to visually compare two PDFs
#36Earlier quoted context omitted.
Here is one: https://vslavik.github.io/diff-pdf/
Can anyone explain how to interpret that screenshot? It just looks like a very blurry text to me.
If it was sharp, they would be identical. The “blurriness” is doubling, where the lines are not quite aligned. Red text there show you content that is in one and not the other.
Re: Diff-pdf: tool to visually compare two PDFs
#37You can do this with Beyond Compare (it's not free, but not very expensive either) https://www.scootersoftware.com/
Beyond Compare is one of those priceless tools I pay for myself instead of waiting for my employer to pay for it. Price/functionality wise it's worth its weight in gold, it's cross platform, and its licensing is very liberal. There's just no FOSS compare tools out there that can match BC.
Re: Diff-pdf: tool to visually compare two PDFs
#38In a previous job, I had to validate the output of an unreliable production publishing system, so I tested dozens of PDF comparison tools available at the time. The best I found was called Delta Walker. It was proprietary commercial Mac-only software, but reasonably inexpensive, accurate, and could handle long PDFs with lots of graphics well.
I remember evaluating this diff-pdf tool and finding that it fell short in some way, although it's been so long that I don't recall the specifics. Most of them failed to identify changes or reported false positives. I also remember being disappointed since this one was open source and could easily be scripted.
Re: Diff-pdf: tool to visually compare two PDFs
#39Can anyone recommend a method to deduplicate pdfs? The hash is often different but the content and meta data is 99.99% the same.
cp?
Re: Diff-pdf: tool to visually compare two PDFs
#40I have been using this in a CI pipeline to maintain a business-critical PDF generation (healthcare) app (started circa 2010 I think), here is the RSpec helpers I'm using: https://gist.github.com/thbar/d1ce2afef68bf6089aeae8d9ddc05d... The code contains git-stored reference PDFs, and the test suite re-generate them and assert that nothing has changed. Helped a lot to audit visual changes, or PDF library upgrades!
Are you using singed digests in the PDFs?