Fig. 3.

Spatial organization of the slices in the X- and Y- datasets for two different values of Θ = (x₁, y₁, Δx, Δy), where the origin (x₁, y₁)and spacing between slices Δx and Δy are only known approximately in the two 3D+time datasets $I_i^Y$ and $I_j^X$. The z-axis is perpendicular to the viewing plane and is indicated with a cross. Y-dataset $I_i^Y$, i = 1, 2, ..., N_y spans [x_min, x_max] and X-dataset $I_j^X$, j = 1, 2, ..., N_x spans [y_min, y_max]. The slices from the two datasets intersect along lines parallel to z-axis (indicated with crosses). The shaded region indicates the domain $\mathcal{X}$.