A lot of the images that I post are schematics and diagrams. In those, about 30% of the "ink" is in the callouts and labels. I believe, readers comprehend better when the text is on the figure, compared to putting it in the caption under the figure.
I'd hate if all this goodness goes unnoticed by search engines. Of course, I can use
alt='' attribute and
<figcaption>, but it would be nicer if the text inside of the diagram got indexed too.
So far, I found these image publishing guidelines by Google. They advise against embedding text into images. But I wonder, how old are those guidelines? The videos on that page are from 2007 and 2009.
So, finally, my questions are:
- Does Google OCR and index text in the images?
- If not, what are the ways to make Google index diagrams with text? (I'm guessing, may be diagrams can be posted as SVG. There is a report that Google indexes inside SVG.)