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Noise Measurement You may use the MAD (Median of Absolute Deviation, See Relation to the Standard Deviation) Trick for noise estimation. Basically applying an High Pass Filter on the image and scale it: $$ \mathrm{median} \frac{ \left| {d}_{i} \right|}{0.67449} $$ Where $ {d}_{i} $ are the pixels values after The filtration. I am simplifying here the method,...

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