Just so you know. Maybe I’m late to the party.
I take pictures of letters that I write in longhand (yeah, I do that, I’m old, and weird) just so I don’t repeat myself in subsequent letters.
Yesterday, I searched in Google Photos on a word in the text of a letter, and it worked!.
So, I surmise that Google is using Optical Character Recognition (OCR) to index pictures of handwritten text and using that in it’s search algorithm(s). I assume it has been going on a while since it found something I wrote months ago.
Don’t assume that using an image protects your content from our tech overlords.
Image credit https://unsplash.com/@jbcalligraphy52.
That’s how they translate images. It have been a thing for years.