Figure 4

EPI volume structure. (a) Camera setup. The sampling camera moves along a straight line; the direction of the camera is perpendicular to the camera location line. (b) Each point in space maps to a line in the EPI volume. Observe that the blue object is closer to the focal plane and therefore occludes the red object. It can be shown using (4) and (5) that a data sample (x, y, V _x ) can be mapped onto a different viewpoint ${V_x}^{\prime }$ with spatial coordinates $x^{\prime }=x-\frac{f\left(V_x^{\prime }-V_x\right)}{Z}$ and y' = y. (c) Shows a cross section of the EPI volume. This figure is obtained by stacking a 1D array of images into a volume and taking a cross section of the dataset. Two EPI lines which correspond to two points in space are illustrated.