setting 0 value pixel to NaN or ignoring pixels=0

Posted by O_W_H on Jun 09, 2020; 2:04pm
URL: http://imagej.273.s1.nabble.com/setting-0-value-pixel-to-NaN-or-ignoring-pixels-0-tp5023459.html

Hi I currently have an image which have a condition whereby pixels on the
outer rows or columns are set to 0, following which the adjacent pixel are
also set to 0.

I now need to remove these zero pixel from my analysis e.g. so that when i
run my min function it does not include the zero and also when i apply a 9
point filter the 0 values in these rows/columns should not be taken into
consideration.

I am very new to imageJ and can't seem to find the best way to do this. I
changed the threshold which sorted the minimum value reported but it is
still affecting my filter.






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