How much can a Gaussian smoother denoise?

Sagar Venkatesh Gubbi, Ashutosh Gupta, Chandra Sekhar Seelamantula. How much can a Gaussian smoother denoise?. In Dhruv Batra, Michael Brown, Vijay Natarajan, editors, Proceedings of the Tenth Indian Conference on Computer Vision, Graphics and Image Processing, ICVGIP 2016, Guwahati, Assam, India, December 18-22, 2016. ACM, 2016. [doi]

@inproceedings{GubbiGS16,
  title = {How much can a Gaussian smoother denoise?},
  author = {Sagar Venkatesh Gubbi and Ashutosh Gupta and Chandra Sekhar Seelamantula},
  year = {2016},
  doi = {10.1145/3009977.3010027},
  url = {http://doi.acm.org/10.1145/3009977.3010027},
  researchr = {https://researchr.org/publication/GubbiGS16},
  cites = {0},
  citedby = {0},
  booktitle = {Proceedings of the Tenth Indian Conference on Computer Vision, Graphics and Image Processing, ICVGIP 2016, Guwahati, Assam, India, December 18-22, 2016},
  editor = {Dhruv Batra and Michael Brown and Vijay Natarajan},
  publisher = {ACM},
  isbn = {978-1-4503-4753-2},
}