How do you measure the roughness of a pellet surface? Generally, in the case of thin film AFM it is quite useful provided the roughness should exceed greater than 10 micron.
what is the size of your pellet. Have u thought of profilometer? Maybe that can help you. There are various different variant of profilometer are available can can be readily used for measuring the roughness of the samples.
You can do 3D profilometry for measuring the surface roughness. It can be helpful for you.
Think about optical Interferometry. It may give the best results for pellet surface profile.
You can use a "coordinate measuring machine" for a micro scale and a confocal microscopy for a nano scale
I think in your case surface profilometer is very easy to use. This technique is very simple.
if you want absolute value (nm) level use STM - otherwise any surface roughness meters
with neural network or wavlet you can measure the roughness of a pellet surface.If you use neural network , you need inputs and output for model. when you model with neural network and product a good model you can prediction roughness of a pellet .
when you assume many things in neural network what the harm assuming surface rough too - we want actual experimental measurement values
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