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Re: Invisible empty Images in accessible PDF - bug? fix?


From: Philip Kiff
Date: Apr 29, 2020 3:07PM

A couple guesses for you to try.

Have you tried to find the objects in the "Content" panel? If you open
up the content tree for Page 1, you might be able to find the objects by
uising your cursor to manually navigate down all the individual content
items. Warning: if you delete items from the Content panel, then they
are permanently deleted from the PDF: it isn't like a tag in the tag
tree which can simply be retagged.

Second guess, is it possible that you have empty "Figure" tags in the
"Tags" panel? It can sometimes happen that when you delete or move or
re-tag an object that an empty tag container gets left behind in the Tag
tree.  These ghost tags can cause errors in automated checkers even when
they contain no content.


Philip Kiff
D4K Communications

On 2020-04-29 14:22, Christine Hogenkamp wrote:
> Hello everyone,
> I am working on an accessible PDF that I am creating from an InDesign file
> that was given to me to arrange for proper accessible PDF publishing (ie
> tagging elements, add alt text, etc) and overall the doc passed the Acrobat
> Full Check except for a few items flagged under "Other elements alt text -
> Failed" which I am not sure if it's a bug or why I can't seem to get it
> fixed using the normal Acrobat methods.
> Acrobat is detecting a handful of empty Images without alt text that come
> first on a few pages that are not present in the InDesign doc (literally
> does not show in the Layers panel, no stray text boxes/vector, etc), but
> also can't be visually seen on the page itself when using the Reading Order
> panel (the page numbering starts at 2, and 1 is not visible anywhere). When
> these invisible Images are selected and the right-click option Delete
> Selected Structure Item is chosen for the Image, nothing happens. They
> won't let themselves be deleted, which leads me to believe they are a bug
> of some kind happening when publishing the PDF.
> Any thoughts or suggestions for a fix? I am prepared to tell the client to
> just ignore them, seeing as the Full Check has other items that we know
> usually get flagged but are correct in the document, and these empty Image
> elements don't seem to affect screen reader or keyboard navigation, but I'd
> like to know how to prevent this from happening in the future if possible.
> Thanks!
> *===*
> *Christine Hogenkamp*
> Front-end Developer
> 317 ADELAIDE ST. W., #500 | TORONTO, ON CANADA | M5V 1P9
> <https://maps.google.com/?q17+ADELAIDE+ST.+W.,+%23500%C2%A0+%7C%C2%A0+TORONTO,+ON+CANADA%C2%A0+%7C%C2%A0+M5V+1P9&entry=gmail&source=g>
> > > >