First, consider the fact that there is no such thing as “AI image denoising”. Second, do you have a specific method in mind? Have you tried searching the web before asking here?
Check:
Take a look at the JuliaImages Github organization. There are various packages for image processing, some of which can be used for image denoising.
And if you are talking about neural-net-based methods, take a look at the neural-net libraries such as Flux.jl, Knet.jl etc.
Also, you asked the question in the Visualization subdomain on Discourse, which is not a good fit for discussions about image denoising.