Search for words in your images in Office 365

https://techcommunity.microsoft.com/t5/Intelligent-Search-Discovery/Search-for-words-in-your-images-in-Office-365/ba-p/135703

What kinds of images can be made searchable?

There’s a great range with 21 different file formats including common ones such as “bmp”, “png”, “jpeg”, “jpg”, “gif”, “tif”, “tiff”, “raw”, and also “arw”, “cr2”, “crw”, “erf”, “mef”, “mrw”, “nef”, “nrw”, “orf”, “pef”, “rw2”, “rw1”, “sr2”.