Apologies if this is not in keeping with ASE, but I wondered if anyone knows? I have a paper I submitted nearly 5 months ago that is still in peer review. I'm not sure if this is an appropriate time to email the editor. Many thanks!
LetPub.com states "about 8.1 months" as the average duration of peer review for IEEE Transactions on Image Processing 1.
They claim the "data is from authors," but I do not know how or if they obtain a representative sample.