[NTG-context] Re: images with alt text

[Hans Hagen <j.hagen@xs4all.nl>]

On 2/5/2025 12:27 PM, luigi scarso wrote:
> 
> 
> On Tue, 4 Feb 2025 at 16:44, Florent Michel <florent.m42@gmail.com 
> <mailto:florent.m42@gmail.com>> wrote:
> 
>     Hi,
> 
>     It seems that the accessibility page has moved here: https://
>     wiki.contextgarden.net/Input_and_compilation/Accessibility <https://
>     wiki.contextgarden.net/Input_and_compilation/Accessibility> .
>     Maybe the last example is suitable?
> 
>     (It seems to correctly embed the alt text in the pdf; this can be
>     checked by using the `--nocompression` flag and opening the
>     resulting pdf with a text editor. Not sure how to have the alt text
>     in the exported html, though; I'm sure others will be able to advise
>     on that better than I could.)
> 
> 
> This is an example
> https://assets.publishing.service.gov.uk/media/679a0c48a77d250007d313ee/ 
> International_AI_Safety_Report_2025_accessible_f.pdf <https:// 
> assets.publishing.service.gov.uk/media/679a0c48a77d250007d313ee/ 
> International_AI_Safety_Report_2025_accessible_f.pdf>
> 
> and this a checker
> https://pac.pdf-accessibility.org/en <https://pac.pdf-accessibility.org/en>
> 
> (the pdf doesn't seem good for accessibility)

well, with over a decade of accesibility not resulting in free viewers 
that do something useful with it one can always adapt the definition 
(and implmentation) of accessibility to whatever tool or checker one has

a while ago Mikael and I tested Chat on a simple integral with limits 
... it started to be clever and didn't need tagging at all because it 
looked at hwo characters got positioned, but, when challenged, at some 
point it swapped positive and negative values (top / bottom bounds); 
when pressed a bit it admitted to be wrong, and in the end we got 
confirnmed that its interpretation of the pdf page stream for relative 
positioning (which in itself impressive) was wrong but then it started 
to hallucinate so we quit

Hans

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