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veraPDF / veraPDF-library

Industry supported, open source PDF/A validation library
http://verapdf.org/software
GNU General Public License v3.0
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PDF/A-2B validation misses validation for images with "/Interpolate true" #1423

Open rogerk-apryse opened 5 months ago

rogerk-apryse commented 5 months ago

Hello,

I have a document that passes PDF/A-2 validation with veraPDF but when running it through a fairly new version of Acrobat (version 2023.008.20555) PreFlight, we get an error that says, "Interpolate key for image not false (28 matches on 1 page)"

I checked the PDF file and indeed it turns out that it had /Interpolate true dictionary entries for image objects that are masks of other image objects for the first 27 matches, and the 28th match it was an image for a page thumbnail.

I am not sure if this is something that should be fixes in veraPDF so that it catches these cases or, perhaps, veraPDF only checks images that are directly referenced from page content or page resource dictionaries?

Thanks Roger

MaximPlusov commented 5 months ago

Hi @rogerk-apryse I wonder if you could attach the PDF file you mention in the issue?

rogerk-apryse commented 5 months ago

Hi @MaximPlusov , here's a zip file with two smaller size versions of the file we have, both converted to PDF/A-1B, both pass veraPDF validation, but one opens in Acrobat and the other does not. pdfa_1b_mask_with_colorspace_test_files.zip

Thanks Roger