- lentil.detector.dark_current(rate, shape=1, fpn_factor=0, seed=None)¶
Create dark current frame
If applied, dark current fixed pattern noise (FPN) is modeled by a log-normal distribution ,  with mean = 1.0 and sigma = fpn_factor where rate = rate * FPN.
rate (int) – Dark current rate in electrons/second/pixel
shape (array_like or 1) – Output shape. If not specified, a scalar is returned.
fpn_factor (float) – Dark current FPN factor. Should be between 0.1 and 0.4 for CCD and CMOS sensors .
seed (None, int, or array_like, optional) –
Random seed used to initialize
RandomStatewill try to read data from /dev/urandom (or the Windows analogue) if available or seed from the clock otherwise.
Be aware that if fpn_factor is nonzero and a seed is not provided, the fixed pattern noise will be different each time dark_current is called.
dark – Dark current frame
- Return type
 Janesick, J. R., Photon Transfer, Vol. PM170, SPIE (2007)