Noise#
- class popkinmocks.noise.ConstantSNR(component)#
- get_noisy_data(**kwargs)#
yobs(x,w) = ybar(x,w) + eps(x,w)
- get_sigma(snr=100.0)#
sigma(x,w) = ybar(x,w)/snr
- Parameters:
snr – the desired constant signal-to-noise ratio
- sample(**kwargs)#
eps(x,w) ~ Norm(0 , sigma(x,w))
- Parameters:
snr – the desired signal-to-noise ratio
- class popkinmocks.noise.ShotNoise(component)#
- get_noisy_data(**kwargs)#
yobs(x,w) = ybar(x,w) + eps(x,w)
- get_sigma(snr=100.0)#
sigma(x,w) = K ybar(x,w)^(1/2)
Proportionality constant K chosen so that brightest pixel has desired snr i.e. you set the maximum snr
- Parameters:
snr – the desired maximum signal-to-noise ratio in a pixel
- sample(**kwargs)#
eps(x,w) ~ Norm(0 , sigma(x,w))
- Parameters:
snr – the desired signal-to-noise ratio