Microscopic Evolution of Pore Characteristics and Particle Orientation of Granite Residual Soil in One-Dimensional Compression

Figure 4

SEM image processing and particle identification. (a) Original image. (b) Binary image. (c) Erosion operation is used to eliminate narrow bridges and particles. (d) Pixels of the eroded part are integrated into the nearest connected regions. (e) Separated particles through the watershed algorithm. (f) Particles replaced by fitting ellipses.