[SciPy-User] Image analysis: Counting masked areas

Michael Aye kmichael.aye@googlemail....
Wed Oct 21 02:12:00 CDT 2009

Dear all,
is it possible to count the areas in an image, that have been masked
by some condition?
I need to count all areas in an image darker than a certain value.
Masking is no problem, but how do I count independent areas? I was
thinking just to look at the masked array, but then a pixel-by-pixel
check if the neighbour pixel is masked as well to find *independent*
masked areas sees numerically very costly.
Isn't there a better way?

Many thanks for any help!

Best regards,

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