Artifact removal and denoising are only sort-of-kind-of the same thing. At a high enough level, you are using a model of some sort to estimate (or guesstimate)

Artifact removal and denoising are only sort-of-kind-of the same thing. At a high enough level, you are using a model of some sort to estimate (or guesstimate) changes in the image but the models for "X type of noise from the sensor" and "artifact due to block size choice" or "artifact due to aliasing in the RF domain" or whatever are quite different.