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Two pictures of the same perspective scene. (a) The picture was taken with a camera equipped with a lens having a focal length (FL) of 36 mm and a field of view (FoV) of 43°. (b) The picture was taken with another lens (FL 72 mm, FoV 22°) from another camera position. (c) The picture is a resized version of Figure (b). The house on the left side is scaled to that of Figure (a). (d) Figure (c) including a thin black rim is placed on top of Figure (a).
