PHC Jeff Hilton302.303Figure 5-21.–Vanishing point perspective.points. Thus lines that are parallel to the lens axis, ornearly parallel, start in the front of the picture and meetat vanishing points within the picture or at finite pointsoutside the picture (fig. 5-21).Height PerspectiveThe place where the base of an object is located onthe ground in a picture is a clue to its distance from thecamera viewpoint; for example, in a landscape scene,the ground or ground plane rises toward the horizon. Thehigher up in the ground area of the picture (up to thehorizon) that the base of an object is located, the furtheraway it seems from the viewpoint and the greater itsheight perspective.Overlap PerspectiveAnother clue to distance in a photograph is overlapperspective. When subjects within the picture are onabout the same line of sight, those objects closer to thecamera viewpoint overlap more distant objects andpartially hide them. It is obvious to the viewer that thepartially obstructed object is behind the unobstructedobject. This overlap is repeated many times within thepicture and gives the viewer a sense of depth and aperception of the relative distance of objects.5-24
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