Fig. 3From: Examination of Cinnamomum camphora interlocked grain adopting X-ray computed tomography combined with particle image velocimetryIllustration of the lateral shifting of a group of vessels in two consecutive transverse images showing the definitions of the grain angle (δ) and inclination angle (ϕ). Coordinates x, y refer to the group of vessels in the first image whereas × 1, y1 refer to the most similar group in the second image. Wood orthotropic directions: tangential (X), radial (Y), and longitudinal (Z)Back to article page