Please explain more for determination of porosity and pore size in SEM images?
You can use display reference lengths which present on the bottom of SEM image for them.
On your SEM images, if the pores are visible, then either you can ask the SEM operator to mark the lengths of the pores or you yourself can take the scale given at the bottom of the image as standard, and mark yourself.
I would recommend that you post an image. Based on this we can discuss how pores can be described.
One simple method is by using ImageJ Software, it is free and user-friendly. It can determine pore size and distribution, surface porosity and even the roughness (units are not expressed in nm) with a 3D mapping of the SEM image, among other uses.
There are several articles in membrane science that used this software for different purposes.
I recommend two articles that will be very helpful for basic ImageJ quick learning:
1. Rishi et al., Particle Size and Shape Analysis using Imagej with Customized Tools for Segmentation of Particles, International Journal of Computer Science and Communication Engineering, 2015.
2. Rishi et al., Particle Size and Shape Analysis using Imagej with Customized Tools for Segmentation of Particles, International Journal of Engineering Research & Technology, 2015.
If you want further details and other articles please do not hesitate to contact me.
Good luck!
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