Projective Geometry in Computer vision is an important concept. Projective geometry provides the mathematical formalism to describe the geometry of cameras and associated transformations, enable the manipulations of 2D projections of 3D objects. The definition of Projective Geometry in Wikipedia given HERE.

Just like an English Grammar has First, Second and Third Person Perspectives, Computer vision has One Point, Two point and 3 Point Perspective of an image.

One Point Perspective
It has a single vanishing Point. All the edges are connected to this single vanishing Point.

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