Figure 16.
Four images depict microscopic views of a sample, A shows a grey image of texture, B shows a red highlighted view, C shows a black and white contrast view, and D shows a line drawing of shapes.The image features four parts, labelled A to D. Part A depicts a close up greyscale microscopic view of a textured sample, illustrating a rough surface with various irregularities. Part B depicts a similar view with certain areas highlighted in red, indicating a specific feature or aspect of the texture. Part C depicts a black and white image contrasting various areas, providing insight into the sample composition. Part D depicts a line drawing with primarily oval shapes, presenting a stylised representation of the textures shown previously. This layout supports comparison of the visual characteristics and processing of the sample across different image representations.

Workflow for quantifying pore size in a vertically cut soil sample with 2.0wL 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

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