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From: ImageAnalyst on 12 Jul 2010 20:09
On Jul 7, 2:45 pm, "eli goodwin" <egood...(a)uoregon.edu> wrote:
[snip]
> I tried this
> lblmask = bwlabel(mask)
>
> then further along...
> s = regionprops(lbl, lblmask, 'area');
>
> and it didn't work. no areas were calculated and the resulting binary video was empty (all black).
-----------------------------------------------------
Well look at your code. You passed in some undefined array as your
first argument - it should have been lblmask. Then look at your
second argument - it's the labeled image but it should be the original
gray scale image.

If what your other message was referring to was a way of taking a mean
and area with a logical linear index like this:
meanGL = mean(redImage(maskImage));
area = sum(maskImage(:));
as long as you're calculating the stats over all blobs in the image.
You really only need regionprops() if you have multiple blobs,
otherwise there are alternatives.
-ImageAnalyst
then, yes, you can do it that way.
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