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Three-Point Perspective
Published in Craig Attebery, The Complete Guide To Perspective Drawing, 2018
Three-point perspective is defined by the center of vision. In one- and two-point perspective, the line of sight is parallel with the ground plane; the center of vision is focused on the horizon line. In three-point perspective, the line of sight is angled to the ground plane; the center of vision is above or below the horizon line. To put it simply, the viewer is looking up or looking down in three-point perspective. If the viewer is looking up (a “worm’s-eye” view), the center of vision is above the horizon line. If the viewer is looking down (a “bird’s-eye” view), the center of vision is below the horizon line (Figure 17.1). All lines are foreshortened in three-point perspective, and none are parallel with the picture plane.
Tools of the Trade
Published in Gideon Samid, Computer-Organized Cost Engineering, 2020
The laws of perspective allow an illusion of three dimensions to be created from a two-dimensional graphic representation. The main problem is that these illusions are not completely universal, and there are people who will have difficulty in the intended three-dimensional interpretation of the graph. Otherwise, three-dimensional graphics offers powerful displays of data and can expose three variable relationships that remain hidden in two-dimensional displays. The procedure mentioned with two-dimensional graphics to allow three-dimensional representation can be extended into three-dimensional graphs to allow four-dimensional and higher dimensionality virtual pictures.
Glossary of Computer Vision Terms
Published in Edward R. Dougherty, Digital Image Processing Methods, 2020
Robert M. Haralick, Linda G. Shapiro
A vanishing point is the point in the 2D perspective projection image plane where a system of 3D parallel lines converge. The vanishing points of all systems of 3D parallel lines parallel to a given plane will lie along a corresponding line in the 2D perspective projection image plane called the vanishing line for the given plane.
The role of a graphical interpretation factor in the assessment of Spatial Visualization: A critical analysis
Published in Spatial Cognition & Computation, 2023
Kristin A. Bartlett, Jorge Dorribo Camba
Rather than axonometric, some of the stimuli in the original V/K MRT are rendered as perspective projections. However, the viewpoints used to present some of the shapes cause the perspective drawings to be inaccurate. In perspective drawing, lines that are parallel to one another in the real shape appear to converge to a single point (called vanishing point) in the drawing. In the case of question 2 option D of the original V/K MRT (shown in Figure 5), for example, many of the lines that recede back to the vanishing point are not converging correctly, leading to a warped appearance of the shape. The extended lines should converge at a single point.