Hello,

i have to compare two S2 products on the same area taken at different times.

So my idea was to first standardize the values in each band. Exactly if i can assume brightness = mean and contrast = stddev i was thinking to apply the classic standardization formula:

B_standard = (B_x - mean (B_x)) / stddev (B_x).

First of all i wonder if this is a correct procedure and if so i can’t find a way to obtain it in SNAP.

Band-math can’t be used on whole bands at once and even if i want to do it on each band one by one the functions *mean* and *stddev* don’t calculate it on the whole band’s value in a single run.

Is there a way in SNAP to obtain such results?

If not can you help me with any different idea about how to get similar standard values?

Thanks.