Of course it is technically possible, but I haven't seen it done properly. I have never seen a book with math rendered as images that was of satisfactory quality or even close to what PDF can offer. I doubt IEEE explore is an exception, but I don't have an account, so cannot check.
I would like to be able to read a book also on a phone, but I am not going to compromise on quality for that, given that I can just read it on a large tablet in PDF format.
I would like to be able to read a book also on a phone, but I am not going to compromise on quality for that, given that I can just read it on a large tablet in PDF format.