© ICSPI Corp. 2007-2021
nGauge AFM User Manual 2.0
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6.1.
Gwyddion
An example on how to process AFM images in Gwyddion is provided in Section 61 Gwyddion.
gives detailed descriptions of the program's capabilities, but below
are some useful functions that are commonly used:
Data Process > Level >
Polynomial Background
If there is any tilt or curvature in the image, this function will help
remove it. You can specify the polynomial degree in the
horizontal and vertical directions.
It is often helpful to remove 2
nd
order background noise in the X
direction.
Data Process > Correct
Data > Align Rows
If each horizontal line in the image does not quite line up with
the ones above and below it, this function will subtract the
height differences line-by-line. "Median of differences" works
well.
Data Process > Basic
Operations > Limit Range
A random high or low pixel can throw off the contrast in an
image. This function allows you to set a high and low value to
remove outliers or extra-large features.
Tools > Crop Data
Crop out unwanted parts of an image.
Tools > Extract Profile
Drag a line over your image to view the profile.
Tools > Statistical
Quantities
Display values like RMS roughness and Ra. A box can be
dragged over your image to select a specific area to measure.
View > 3D View
Display a 3D view of the image. You can rotate or scale this 3D
image, change the colors, and save it.
