m***@uga.edu
8 years ago
When calculating the signal-to-noise ratio in a (linear) digital image, should one define the decibel as 10*log10 or 20*log10 ?
The case for 10*log10 is that the values represent luminous intensity, which is power.
The case for 20*log10 is that the values represent voltages in the CCD cells.
I see some people doing it either way. Which is best? Is there a standard?
The case for 10*log10 is that the values represent luminous intensity, which is power.
The case for 20*log10 is that the values represent voltages in the CCD cells.
I see some people doing it either way. Which is best? Is there a standard?