#sorry to any screen reader followers i don't know how alt text works

[butterflieswhisper]

‼️‼️‼️‼️‼️‼️

they're so cool. they are so cool. testament guilty gear my beloved they're so cool. I love love love this art specifically it's so good. the way the most vibrant part is the blood that forms their staff but only the part that pools under them. something something weight of their actions etc etc. they are also non binary and so cool forever and ever

[solarishashernoseinabook]

SOLAR okay hi!! So I’ve noticed a while ago that some people will write image IDs in alt text and also paste them in the post! And I was wondering the purpose of that- but I sorta just forgot about it!

But!! I always write alt texts for my art, and other posts I make with images. Someone reblogged some of them and tagged “undescribed” and that confused me (for clarity, note that I am not like, offended by this or anything, only confused! I just don’t understand why :]!!)

so I was wondering if you know why that might be? The reason I ask you is because I don’t know who else I would ask D:

Basically I’m wondering if I should be putting the IDs in the post as well as in alt texts, or if it’s simply a matter of preference!

okay SO! This isn't necessarily an easy answer. There's a few components to this and different things to consider, so let's take it step by step, go over obvious information, and then get to the root of your question. This is not going under a cut, sorry folks but tumblr can be finicky and information under a readmore can get lost fairly easily.

DISCLAIMER: I don't require image descriptions in my daily life, but i've been writing them for four-ish years at this point. The information below is what I've gathered from several "how to do image descriptions" posts over the years. I'm open to any corrections, feedback, or additional information anyone can provide!

Why do people require image descriptions? Pretty simply, for one reason or another, a person can't access the contents of an image. They could be blind or low vision, or have a learning disability that makes reading difficult. An image description can either transcribe text in an image (e.g., a description might read "text saying i love birds") or describe the contents of a picture (e.g., "a cartoon image of a bird on a nest"). People with low/no vision, or who can't read, use a variety of accessibility aids to help them navigate the 'net.

What are some of these accessibility aids? They take various forms - and that's more important than you might think! Screen readers are the most obvious, but they're not used by everyone. Other people use dyslexia-friendly fonts, magnify text, or invert colours or use high-contrast mode to make reading text easier. However, none of these options work with plain images! Someone with dyslexia could probably see the image of a bird on a nest just fine, but may not be able to read the words "I love birds" in a screenshot. Someone with low vision might not be able to see either image. If an image has a description attached, the text of the description will be magnified, or its font will be changed, or it'll be high contrast, or whatever else that person needs, and they can access the image via its description.

Alt text, image descriptions, and pros and cons of each So, what are some of the benefits of alt text? Because alt text is attached to an image, people using screen readers will have the description read to them as soon as they get to the image (if an image has no alt text, the screen reader will just say "image"). Because it's attached to an image, it's harder to lose it - if a post originally doesn't contain image descriptions and someone reblogs with a description later on, there are still going to be reblog chains that don't have the description attached to them. Some people also prefer alt text because image descriptions can make a post look "messy" - some people are less likely to reblog posts with visible image descriptions attached to them. And, for people who use screen readers, it can be really annoying to just hear "image" without knowing if it's followed by a description or not. But as we established, not all people who need image descriptions use screen readers, and not all accessibility aids work with alt text. For people who magnify text, for example, alt text often gets cut off. This is a bit easier to deal with on desktop - there's an XKit extension that puts alt text in a grey box below the image - but on mobile, this can be a real problem. As yet, I don't know for sure if high contrast, inverted colours, or accessible fonts work with alt text on mobile or in the visible alt text the XKit extension provides (if you know, please, tell me!) - but I know they work for image descriptions posted after an image. Alt text is great, but image descriptions are, at the moment, more consistently accessible.

So what should I use? Both? While either alt text or image descriptions are good, the consensus among those who need them seems to be to use one or the other, not both on the same post. For people who use screen readers, hearing the alt text only to immediately hear it repeated can be annoying. I'll use alt text if it's only going to be a couple of words or a single line, but otherwise I tend to use the alt text to say "image described below" to reassure those with screen readers.

But WHY are people tagging my post as undescribed? Bestie you wouldn't believe what people can miss. I've got a viral post that's got a GIF followed by a very obvious image description and it gets tagged as undescribed every so often. If you're using mainly alt text, it's possible that it's not visible on mobile yet - the tumblr app only shows the little alt text box about half the time. Or people get lazy and forget to check, or force of habit means they tag undescribed even though they did notice. Just tag them in the replies and point out that the description is actually there - the undescribed tag exists because a lot of people who need descriptions filter that tag so they don't waste their time on posts they can't access, and they deserve to see accessible posts!