Figure 4.

Geometry of the pictorial scenes of Figure 1d. (a) Top view of the pictorial scene. Sizes and distances of objects are not to scale. Distances were computed for the traffic sign (r_ts36 and r_ts72r) and house (r_h36 and r_h72r) depicted in the two pictures. The viewer (curve at the left side) is looking at the pictures (yellow bar) from a distance r_p. (b) Pictorial distances of traffic signs and houses that produce the same retinal images as their projections in the pictures. Distances are computed as function of r_p. Thin lines mark the viewing distances at which the computed distances are equal to the physical distances (see Figure 2a). (c) Relative (green) and absolute (magenta) depth between the computed distances of traffic signs and houses as function of r_p.