Andrés Muñiz Piniella | 7 Aug 11:26 2015
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ISO pitch measurement

Hello all,

Does anybody have an automatic way to do measurements of pitch artifacts?

The calibration part in the manual seems to be regarding how to correct images after they have been measured.

But according to ISO 5435 (type C section 7.5) and later refering to ISO 3274. There seems to be an official way:

At least 12 section lines, measureing the distance between half peaks. And probably other details such as compensating for the angle and measuring several half peaks and then dividing.

I imagine something like using droplet analysis? Or using a graph function I have missed? Or am I better off just doing this outside gwyddion?

Regards,
Andres

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Andrés Muñiz Piniella | 23 Jul 15:27 2015
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Minor bug? Quick viewer

Gwyddion 2.41 64bit windows.

When merging in a park/psia *.tiff file into gwyddion the data 'quick view' on the right shows the right pixels (4095x1024) but wrong dimensions 5x5 microns. The data is imported correctly 6x1.5 microns.


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Andrés Muñiz Piniella | 16 Jul 00:29 2015
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Just for fun: 3D printed data

Dear all,

Has anybody done exporting of xyz data to a 3D printed format? The closest thing I found was a python script to add to blender. But it seems to be atomic xyz atom coordinate data.

Andres
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Nicholas Fischer | 15 Jul 17:13 2015
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Force Curve

Hello All,

I am trying to derive the force applied to a sample through a force curve 
(Volts v. Meters). How do I go about doing this?

Thanks in advance,
Nicholas Fischer

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Bert.Deboeck | 13 Jul 16:36 2015
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(no subject)

Dear all,

I am new in using Gwyddion, and want to do particle analysis of AFM images with it. Is there a way to derive the "mid-height diameter" of particles in Gwyddion?

Thanks in advance for your help,
Kind regards,
Bert
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Nicholas Fischer | 8 Jul 17:54 2015
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Import Text File

Hello all,

I am trying to import .txt file into gwyddion. 
The date is formatted like the following:

23.2, 23.432, 241
23.3, 74.2, 243

How would I formatted this to be able to be opened in gwyddion?

Thanks in advance.

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Andrés Muñiz Piniella | 23 Jun 10:58 2015
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Gwyddio.exe:55824 GLIb-error


Hello,

This might be my computer not having enough resources.

I have a 4096 px image from Park XE-100 AFM I set a mask on one image and as I duplicate it to do another mask the gwyddion stops working when I save it.

Message is:
Gwyddion.exe:55824 GLib-ERROR**:../glib/gmemc:168:failed to allocate 536870912 bytes


The main issue I have  is that it corrupts the saved copy and drops from a 131Mb file to a 0Kb file. Losing very little information but If it happens after a lot of data analyis it could be a problem. At the moment I cautiously save my work with save as...

I am using windows 7 32 bit. 4GB (2.68 GB usable) CPU E5-2630 <at> 2.30 GHz

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Nicolas Delorme | 12 Jun 09:28 2015
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image derivatives or pyramid analysis

Hi,
We are studying surfaces formed by pyramids.
We want to statistically analyse their numbers and height (the shape is the same for all the pyramids).
The masking procedure do not work since some of the pyramids are in contact.
One solution would be to derivate the topographic image (but I don't know if gwyddion can do it) and to count the obtained maxima and look at their relative height...
Is there a way to obtain a derivative of an image with Gwyddion?
If you have another solution for the pyramids analysis it will be great.
Best regards,
Nicolas
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Moriceau, Julien | 10 Jun 21:45 2015

False color map - 3D viewer

Hi all,

I was wondering if it was possible to tune the false color map of the 3D viewer to have it always at the same interval (for example between 0-200 µm).

Indeed I would like to have a visual comparison of several surface with always the same color range.

I know we can tune the label but to my knowledge it is not changing the range of the color map.

Please let me know if I am not clear.

Thanks you for your help and responses.

Regards,

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Evgeniya Khakhalova | 4 Jun 21:36 2015
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Fwd: Calculating specific surface area

Hi Daniil,
Thank you a lot for your helpful suggestions!

To obtain the intersect of two masks I used Data Process-> Mark with-> Intersect masks.
Is the result would be the same if I'd have used multidata arithmetic as you suggested? 

And also when I use Statistical quantities for marked region it gives me Surface area and Projected area. Do you know what is the difference between those two and why the surface area is N.A. for magnetic images (NapPhaseRetrace)?


Thank you!




Be well,
Evgeniya Khakhalova.

On Tue, Jun 2, 2015 at 2:25 PM, Daniil Bratashov <dn2010-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
On Tue, 2 Jun 2015 13:38:35 -0500
Evgeniya Khakhalova <ekhakhalova-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

> Is there any ways that  I can calculate average background noise
> (areas outside the grain) and then use it as a threshold value to
> mask dark/light regions inside the grain and then calculate the
> surface areas of those regions only inside the grain?

The main idea is to select region of interest by mask (by
marking grain by height threshold on height image), than to transfer
mask from height image to magnetic, and than use statistics tool on
region under/not under the mask to measure average background noise.

Than you can use threshold on magnetic image, and than use multidata
arithmetic on both masks to get intersection of two masks.

> 2. If it is actually possible to use crop function for some arbitrary
> shapes like on the example?

Crop is not intended for such applications, better to use masks.

> 3. Can I use for example respective topography image to crop the
> magnetic image along its grain boundaries more precisely?

Yes, by obtaining two masks and then use multidata arithmetic.

I suppose this two links will be helpful:
http://gwyddion.net/documentation/user-guide-ru/presentations-masks.html
http://gwyddion.net/documentation/user-guide-ru/multidata.html

WBR, Daniil Bratashov.

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Evgeniya Khakhalova | 2 Jun 20:38 2015
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Calculating specific surface area

Hi everyone,

I'm a new Gwyddion user and I'm trying to figure out if it is possible to do the following:
1. I've got an MFM image of the magnetic grain and my purpose is to calculate surface area of "light" and "dark" magnetic regions within this magnetic grain. 
"Light" domain area is where  Z-component is greater than background noise, and "dark" - where Z-component is smaller than background noise.
Is there any ways that  I can calculate average background noise (areas outside the grain) and then use it as a threshold value to mask dark/light regions inside the grain and then calculate the surface areas of those regions only inside the grain? 

2. If it is actually possible to use crop function for some arbitrary shapes like on the example?
3. Can I use for example respective topography image to crop the magnetic image along its grain boundaries more precisely?

The left image on the example is Nap Phase Retrace image of the grain, the right one is the height retrace:





Thank you.

Best regards,
Evgeniya Khakhalova.

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