Has anyone tried this or has experience with similar blending techniques? Sounds intriguing ...
https://www.youtube.com/watch?v=oeqQSkTFiYw
http://petapixel.com/2015/03/22/a-trick-for-sharpening-high-iso-photos-in-photoshop-without-adding-more-noise/
creating a High Pass duplicate layer of the photo, desaturating it and reducing noise on it, sharpening that layer, and then blending it into the original photo with Photoshop’s “Linear Light” blend mode.
https://www.youtube.com/watch?v=oeqQSkTFiYw
http://petapixel.com/2015/03/22/a-trick-for-sharpening-high-iso-photos-in-photoshop-without-adding-more-noise/