Here's an example of basis in US law.
This quotation from the Lanham Act is in the wiki article on "trade dress," and this is not an example of trade dress (something like the yellow-and-red Kodak box), but the legal concept here applies:
https://en.wikipedia.org/wiki/Trade_dress#Statutory_source
"Any person who, on or in connection with any goods or services, or any container for goods, uses in commerce any word, term, name, symbol, or device, or any combination thereof, or any false designation of origin, false or misleading description of fact, or false or misleading representation of fact, which
(A) is likely to cause confusion, or to cause mistake, or to deceive ... as to the origin, sponsorship, or approval of his or her goods, services, or commercial activities by another person, or
(B) in commercial advertising or promotion, misrepresents the nature, characteristics, qualities, or geographic origin of his or her or another person's goods, services, or commercial activities,
shall be liable in a civil action by any person who believes that he or she is likely to be damaged by such an act."
Adobe could attempt to claim that the use of "Ansel Adams style" is enough of a disclaimer for them to say they didn't imply sponsorship or approval by the Adams estate. However, both the Adams estate and Adobe probably think Adobe would have a strong chance of losing on the sponsorship, approval, or misrepresentation/nature clauses.