That's an interesting article, and relevant in the sense that the "magic kernel" can be used for purposes of super-resolution, but Adobe is using a fairly diffe

That's an interesting article, and relevant in the sense that the "magic kernel" can be used for purposes of super-resolution, but Adobe is using a fairly different approach. Instead of using analytically-derived functions Adobe is using a deep learning model trained on a large dataset of Low resolution-High resolution image pairs. The details are propietary, obviously, but it's likely similar to various deep learning superresolution algorithms in the academic literature. (Some more info here https://blog.adobe.com/en/publish/2021/03/10/from-the-acr-team-super-resolution.html#gs.w4oanu https://blog.adobe.com/en/publish/2021/03/10/from-the-acr-te...)