Figure 4

3D-360° photogrammetry for studying advanced shape and particle packing. Grains of strontium aluminate (60–90 µm) inside a soda-lime glass capillary tube (wall thickness: 10 µm; width: 300 µm; length: 1,550 µm) were imaged during semi-rotation. (a) Real image in UV in the dark, as described in Fig. 1, right. (b–d) 3D reconstructed model, viewed at −90°, −10° and +80°, respectively.