This image has been reblogged from Infernal Wonders. Its source tumblr indicates that it is a painting by British artist Bruce Pennington (b. 1944) for a cover of Edgar Rich Burroughs’s Master Mind of Mars.
Bruce Pennington has a professional site here.
Yup. Here it is.
https://www.goodreads.com/book/show/5498108-the-master-mind-of-mars
at last, a Deeja Thoris nearly as naked as she is in the original books!