skallos

3x3 homogenous pixel selection

Discussion created by skallos on Jan 21, 2014
Latest reply on Mar 24, 2014 by skallos
Hello,

I'm trying to select suitable sample points for ground truthing some difference normal burn ratio (dNBR) work I'm doing. I need to select a single pixel for selection. The neighboring cells must not differ by 100 dNBR units in a 3x3 frame.

eg

100  150 125

120 75   50

105  80   105        this is good


100  150 400

120 75   50

105  80   105        this is bad


How do I filter or select suitable area that fit this criteria?

Thanks for the help

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