Since shot noise is related to exposure to light, I think one natural way to reduce the noise is by increasing exposure time (e.g. adjust shutter speed/ aperture mentioned before). But can we achieve this by post process like filtering? If so, what are the commonly used and efficient filters that are applied in reality?
longh2000
We could see that SNR relates with concepts like shutter duration that affects photon acceptation but not ISO gains.
sartk
Seems like the vanilla choice for filtering out photon shot noise is a Gaussian bilateral filter -- which is a nonlinear sliding window function that preserves edges well in practice.
Since shot noise is related to exposure to light, I think one natural way to reduce the noise is by increasing exposure time (e.g. adjust shutter speed/ aperture mentioned before). But can we achieve this by post process like filtering? If so, what are the commonly used and efficient filters that are applied in reality?
We could see that SNR relates with concepts like shutter duration that affects photon acceptation but not ISO gains.
Seems like the vanilla choice for filtering out photon shot noise is a Gaussian bilateral filter -- which is a nonlinear sliding window function that preserves edges well in practice.