Perspective projection represents the object in three dimensional way. In parallel projection, these effects are not created. In perspective projection, objects that are far away appear smaller, and objects that are near appear bigger. The distance of the object from the center of projection is infinite.
linear perspective in which parallel lines of the object that are perpendicular to the drawing surface are represented as meeting at a point on the horizon in line with the common point of intersection of the lines of projection. — called also one-point perspective.
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