Only found them by coincidence ;)

1️⃣ In "/settings/preferences/appearance" under "Advanced settings" you can find the option to "Warn me before posting media without alt text"

You can see the error message I see whenever I forget alttext in the second image hehe

2️⃣ When you post an image with text in it, you can simply use the magic AI feature "Add text from image". It usually works very well!

Alt text: "Screenshot of the warning you get with the warning for missing alt enabled. "Add alt text? Your post contains media without alt text. Adding descriptions helps make your content accessible to more people." Below it are 3 buttons "Cancel" "Post anyway" and "Add alt text"

Alt text: "Screenshot of the alt text window, the option "Add text from image" is circled in red.

This is how that "AI" option described the text of the image I posted: "Describe this for people with visual impairments. 1500 Add text from image"

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[–] Agent_Karyo@piefed.world 6 points 2 days ago* (last edited 2 days ago) (2 children)

On one hand, I would prefer if this was done automatically, on the other hand I encountered a rather interesting error the first time I tried it.

I added this screenshot of a solar system colonization game:

This was the auto-generated text provided:

Ve —Y V NEW NOTIFICATIONS ¥ -. > I» I» 3» verr21@2@ MonNTH@1 DAY BT  
(S) FEN Th  
\— @ EARTH ORBIT a  
EY , |  
or a Cee —  
ES eg = |  
Re  
EE -- saTuRN "w Te *  
"¥ CONTRACTS A FACILITIES AND MOOULES EY  
EY VV (Ve mm 17 17 5 Vy, IV, 1  
r rg - [© | -~ = ® |  
Cn oF he fk & ¥ ©, 4 lll, Q,  
3 1 Vs +3 a 3 Vy FF IVa py V,,.] |  
es, WY a oH |  
ro E ¥  
1 = 8 A RESOURCES (1) |  
Ee [ ™ I) ya 0°! oo! @& all o/ mn ©)  
1 less1 || 0 || 171 [ 4907 | 0421 || 200 || 5K [4881  
E Caplio 1 Pars Pl: Si ol |  
: | Le7er J T_|[s86KT|| KT || 465T | [2.79 || 4e2r |[7.74KT | 4 |  
Es, — =  
.  ————— Es ¥ RESOURCE DEPOSITS or | om—=  
en of ] =  
RS A SPACECRAFT  
: 3 ad) 4 RIS E3  
EP =  
oo. *, co crcl] —  
STRATOS £3]  
+. erstrrelll 5  
3 SELENE  
5 w wrolll  
A LAUNCH VEHICLES EY  
- EAGLE  
Ae _—  
3 A PLANNED MISSIONS  
©P2°020900 59% ok  
A LAYERS A | VERSION: .25.1114.2 ALPHA SOLAR SYSTEM - MAJOR OBJECTS EH

[–] Snoopy@piefed.social 2 points 2 days ago

Thank for sharing, i wondered how efficient it was. :)

[–] madeindex@lemmy.world 1 points 2 days ago

HAHAHAHAHahaha yeah it isn't all that advanced yet ;) I think they use something very very lightweight XD