Q needs to be careful

https://www.researchgate.net/publication/255722112_Improved_Methods_for_Dewarping_Images_in_Convex_Mirrors_in_Fine_Art_Applications_to_van_Eyck_and_Parmigianino

https://news.stanford.edu/2018/03/05/technique-can-see-objects-hidden-around-corners/