Hi,

The `standard deviation`

and the `coefficient of variation`

function from the `Band Math`

operator are not working for me, as they always return zero (the expression given are respectively: `stddev(band)`

and `coef_var(band)`

).

Although, when I’ve calculated the `standard deviation`

for the image array given as input (using `numpy`

) the value was not equal to zero!

Thanks.