[Gwyddion-users] Combing forward and backward scan

[Martin Engler]

Hello,

I have images of steep structures. On the ascending side the structure
is resolved, but on the descending side the feedback was not fast enough
to resolve the structure. There are only straight lines visible with out
any structure. As the both directions contain only a part of the
information, i want to combine both direction such that the left side of
a structure is taken from the forward direction and the right side from
the backward direction. How can I do this? My idea is to select the
image which is used for every pixel by the local slopes.

Regard,
Martin Engler

[Daniil Bratashov]

It can be done with multiple data arithmetic, you should select with
mask m1 the data you want from first image a1, than invert this mask
(m2) and apply to second data (a2), than combine both with a1 * m1 +
a2 * m2 (or (a1 * m1 + a2 * m2) / (m1 + m2) if you have intersecting
masks and do not have voids that are not covered by any mask).

http://gwyddion.net/documentation/user-guide-en/multidata.html

WBR, Daniil Bratashov.

Post by Martin Engler
Hello,
I have images of steep structures. On the ascending side the structure
is resolved, but on the descending side the feedback was not fast enough
to resolve the structure. There are only straight lines visible with out
any structure. As the both directions contain only a part of the
information, i want to combine both direction such that the left side of
a structure is taken from the forward direction and the right side from
the backward direction. How can I do this? My idea is to select the
image which is used for every pixel by the local slopes.
Regard,
Martin Engler
--
Martin Engler
Universität zu Köln
II. Physikalisches Institut
Zülpicher Str. 77
50937 Köln, Deutschland
Telefon: [phone]
Telefax: [phone]
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[Martin Engler]

Post by Daniil Bratashov
It can be done with multiple data arithmetic, you should select with
mask m1 the data you want from first image a1, than invert this mask
(m2) and apply to second data (a2), than combine both with a1 * m1 +
a2 * m2 (or (a1 * m1 + a2 * m2) / (m1 + m2) if you have intersecting
masks and do not have voids that are not covered by any mask).
http://gwyddion.net/documentation/user-guide-en/multidata.html
WBR, Daniil Bratashov.

This works well. I did not used the arithmetics tool yet. So I did not
get this simple idea.

Thanks

Martin Engler

[Christian Long]

If you want to skip the slope calculation, another alternative is to use
Multidata Arithmetic to select the "lower" topography from trace or
retrace, which is just "min(d1,d2)", where d1 and d2 are the trace and
retrace topography channels.

Best,
Chris

________________

Christian J. Long, PhD

UMD/CNST Postdoctoral Researcher

Nanofabrication Research Group

Center for Nanoscale Science and Technology

National Institute of Standards and Technology

100 Bureau Drive, Mail Stop 6203

Gaithersburg, MD 20899

[phone] (Phone)

[phone] (Fax)

Post by Martin Engler

Post by Daniil Bratashov
It can be done with multiple data arithmetic, you should select with
mask m1 the data you want from first image a1, than invert this mask
(m2) and apply to second data (a2), than combine both with a1 * m1 +
a2 * m2 (or (a1 * m1 + a2 * m2) / (m1 + m2) if you have intersecting
masks and do not have voids that are not covered by any mask).
http://gwyddion.net/documentation/user-guide-en/multidata.html
WBR, Daniil Bratashov.

This works well. I did not used the arithmetics tool yet. So I did not
get this simple idea.
Thanks
Martin Engler
--
Martin Engler
Universität zu Köln
II. Physikalisches Institut
Zülpicher Str. 77
50937 Köln, Deutschland
Telefon: [phone]
Telefax: [phone]
------------------------------------------------------------------------------
Sponsored by Intel(R) XDK
Develop, test and display web and hybrid apps with a single code base.
Download it for free now!
http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk
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Gwyddion-users mailing list
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