Freeware Tool to compare tiff files ?
I've created an automated test pack for the regression of a quotes systems that will produce any number of test policies.
Each policy, once submitted, will produce a Client pdf document and a tiff file (for upload onto another system and also converted to pdf format).
I'm using ExamDiff to compare the Client pdfs to their baseline (successfully), but have hit a problem with the tiff and its corresponding converted pdf.
ExamDiff wont compare this converted pdf (i'm presuming because its not actual text from the tiff) so I'm wondering if there are any free tools out there that i could use to compare the tiff images instead.
Can anyone recommend a free tool that I could use to compare these tiff files to a corresponding baseline tiff ?
The regression pack will be producing hundreds of pdfs and tiffs so automated comparison tool is our best option - manaul comparison would be too time-consuming.
It's not clear what you mean by "compare" in this context.
If you simply want to answer the question "Are these two files exactly the same, or are they different?", then many tools can compare PDF and TIFF files. In my shop, we use WinMerge (see http://winmerge.org) for comparing a baseline folder of files to a corresponding test folder of files. But there are many other tools that can do something similar, including the Windows command-line tool "fc".
If instead you want to understand "In what way are these two files different?", that's a more difficult question to answer with rich-content file formats like PDF and TIFF. You may be able to find a plugin for WinMerge that meets your needs.
BTW, I'm guessing that you already know that ExamDiff Pro can probably meet your needs, but that you aren't willing to pay for it.
If, on the other hand, you are attempting to "compare" a PDF file to a TIFF file, then you have a different problem on your hands. They are completely different formats internally, so no tool will compare them and find that they are the same. Perhaps you mean "Is the text in this PDF the same as the text in this TIFF?" If so, you'll likely need to use some for of OCR. I haven't used a freeware OCR tool, but perhaps others can suggest one.
Last edited by Joe Strazzere; 12-19-2012 at 02:51 AM.
Thanks for the prompt reply, and apologies, I should've been more clearer about the "compare".
My ideal solution would be to understand "In what way are these two files different?", i.e. a tool that would highlight the differences between the two TIFF files.
I would be using this as part of a regression test, so would be looking to either compare PDF to PDF or TIFF to TIFF.
I have ExamDiff Pro, and the majority of its plugins, but it still seems to be struggling to "highlight the differences" between the "converted" PDFs. The PDFs are basically a PDF generated from the TIFF file, so I think ExamDiff Pro is considering them to be images instead of text, and so wont compare like an ordinary PDF.
Thats why I was hoping there'd be a tool that would "compare" the TIFF files instead.
I'm not ruling out the situation where it might be just something I've set wrong on ExamDiff - any ideas here would also be greatly appreciated.
I know of WinMerge but have never used it, so I've downloaded a version of it now and will see if its of any use to me.
I'm still open to more suggestions though if anyone has other recommendations.
Last edited by BarryMcDermott; 12-19-2012 at 03:56 AM.
You may also want to check out ImageMagick http://www.imagemagick.org/script/index.php
It has a command-line "compare" tool that might fit your needs.