Figure 15.
The image consists of four panels labelled A, B, C, and D, each illustrating the texture and structure of a material surface. Panel A depicts the original surface in grey tones, highlighting the material texture. Panel B depicts highlighted features in red over the original image, emphasising specific areas of interest. Panel C depicts a binary representation of the surface, where the texture appears in black and white, illustrating differences in material composition. Panel D depicts outlined shapes in a lighter tone, resembling a contour map that details the morphology of the observed material. The arrangement flows left to right in rows, providing various analytical views of the same surface.Workflow for quantifying pore size in a vertically cut soil sample with 1.5wL and 1% cement content. (a) Raw SEM image showing the soil structure. (b) Thresholded image with pores highlighted in red. (c) Binary image after thresholding, where pores are white, and solids are black. (d) Pore outlines in elliptical shape