If you have had the misfortune of using the Nanosurf STM, you would no doubt be struggling to achieve a clean atomic resolution scan with your terrible self cut Pt/Ir tips.
Fret not. A shitty scan is all you need.
Look at this ugly beast, blegh. Open it in Gwyddion and select the topology channel.
Choose a funkalicious colour gradient that gets your jive
on. Here’s a personal favourite.
But since this doesn’t fly with THE MAN, choose Gwyddion.net.
1 - Median Line Correction
2 - Remove Scars
3 - Remove polynomial background
4 - Shift min. data value to zero
5 - Correct affine distortion
Choose 2D ACF & HOPG preset (NOTE: your integrity is tested here, more on this later)
Adjust the grid to fit as well as you can, then hit Refine
to get it spot on. If refine fails to get it perfect, retry and do a better job
fitting it.
Spank the OK button
6 – 2D auto correlate function
Colour it. Take a moment to notice that it is ugly as heck.
I’m sure you are thinking this:
“Wow, so ugly, why didn’t I just 2D ACF’ed the picture
before doing that Affine distortion crap, YOU LYING FIEND!”
Fret not, see, without Affine Distortion, the 2D ACF would
give a nice picture with bad results. Observe.
Gross... What about the corrected one?
Nice results, BUT the affine correction overwrites the original image's scale info if you have chosen the "Exactly as specified option" which was used in the example shown. Thus giving you perfect results, at the cost of your integrity.
So either get your scanning angle adjustment right when taking the scan, or just use the "Preserve X scale" option.
K bye.
- Exactly as specified
- Lattice vectors in the corrected image will have the specified lengths and angle between them. Scale information of the original image is discarded completely.
- Preserve area
- Lattice vectors in the corrected image will have the specified ratio of lengths and angle between them. However, the overall scale is calculated as to make the affine transformation area-preserving.
- Preserve X scale
- Lattice vectors in the corrected image will have the specified ratio of lengths and angle between them. However, the overall scale is calculated as to make the affine transformation preserve the original x-axis scale. This is somewhat analogous to the scale treatment in Drift compensation.