Hi,
thank you for you answer.
I read the post you suggested and I agree that leveling is a critical point
in step height determination. Reasonably, using a profile is simpler and
clearer but in my case I need much more statistics than that I can obtaining
by widening a bit the profile. My step is not straight so I can not use a
wide profile without introducing an unwanted noise near the step; at the
same time I'm interested in obtaining a value over the whole image, because
the deviations around the mean are important (I do not have a very sharp
step). That's why I was thinking on using the height profile.
Thank you,
Massimo
On Mon, Mar 22, 2010 at 12:58, David Necas (Yeti) <[email protected]> wrote:
> On Mon, Mar 22, 2010 at 11:50:26AM +0100, Massimo Vassalli wrote:
> > I'm writing to ask for a suggestion about fitting a dual peak Gaussian to
> an
> > height histogram. I'm interested in measuring a step height using not
> only a
> > profile but the full region.
>
> I suggest to take profiles using large width (i.e. averaging) and then
> use Critical Dimensions instead of this method as it is sensitive to
> levelling, see also the previous discussion here:
>
>
> http://sourceforge.net/mailarchive/forum.php?thread_name=20081202095217.GV30769%40physics.muni.cz&forum_name=gwyddion-users
>
> Yeti
>
>
--
Dr Massimo Vassalli
Istituto di Biofisica - IBF
Consiglio Nazionale delle Ricerche - CNR
T: +39 010 6475 571
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