Determine noise level using MAD https://en.wikipedia.org/wiki/Median_absolute_deviation Constant to convert mad to sd calculated using https://www.wolframalpha.com/input?i=sqrt(2)+inverse+erf(0.5) This assumes a gaussian distribution of the noise.
Noise level corresponding to one standard deviation.
Determine noise level using MAD https://en.wikipedia.org/wiki/Median_absolute_deviation Constant to convert mad to sd calculated using https://www.wolframalpha.com/input?i=sqrt(2)+inverse+erf(0.5) This assumes a gaussian distribution of the noise.