As a blind person, I've been thinking a lot about this issue. I think the best recommendation I can give is to try interacting with the resource as if the imag

As a blind person, I've been thinking a lot about this issue. I think the best recommendation I can give is to try interacting with the resource as if the image wasn't there. Maybe remove it for a while. Put the information that you're missing in the alt description. If all the information from the image is understandable without seeing it, think decorative images in newspaper articles, set alt to "". In particular, if the image is a screenshot of a terminal, code or other piece of text, you should put the whole text in the description. In that case, strongly consider omitting the image entirely. When charts are involved, often providing the data in a table next to the chart is the right way to go.