I performed statistics of Landsat OLI bands using 1200 GCP as ROI. The statistic provide

|Number of pixels total:|46840375|

|Number of considered pixels:|1233|

|Ratio of considered pixels:|0.002632344|

|Minimum:|0.610848069|

|Maximum:|60.49078369|

|Mean:|15.42504482|

|Standard deviation:|10.24101555|

|Coefficient of variation:|0.663921283|

|Median:|13.02096473|

|P5 threshold:|3.365325108|

|P10 threshold:|4.323404078|

|P15 threshold:|5.281483048|

|P20 threshold:|6.538961696|

|P25 threshold:|7.556920601|

I am confused about IPx threshold Values what is this

For exampe IP5 threshold in 3.3653 WHAT IS THIS AND HOW IT IS BEING CALCULATED

That’s the **P**ercentile.

Percentile 10 for exemple, means that 10% of the population (here the pixels) you study is below the value of 4.3234 and 90% is above.

Median is just a name for the particular case of Percentile 50, where 50% of the population is below 15.42504482 and 50% above

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Thanks: Can you refer me a paper where I can study and understand this percentile

You don’t need a paper for that. You can learn about percentile in every introductive statistical book. I have a very good one but unfortunately not in english (French).

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Hi @qglaude

You meant Median or Mean!?

Median. I realized I talked about median but took the value of the mean in the example. Thanks for pointing this out.

To be extremely clear, this is what I meant :

Median is just a name for the particular case of Percentile 50, where 50% of the population is below **13.02096473** and 50% above

Note I cannot edit my initial answer

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