SNR Calculator

To compare signal levels, 'add' a graph, change the conditions, and then 'add' again to compare side-by-side.

Signal and Noise Calculator

Grey Value (ADU):

Enter the average grey value of the image

Offset (ADU):

Enter the camera's grey value at 0 light

Gain (ADUs/e⁻):

Enter the camera mode's gain to convert from ADUs to electrons

Read Noise (e⁻):

Enter the camera mode's typical read noise. Modes with lower gain typically have a larger read noise and a larger full well capacity.

Dark Current (e⁻/s):

Enter the camera mode's typical dark current noise

Exposure Time (s):

Enter the exposure time. Larger exposures have increased noise from dark current