In perspective projection the eye is assumed to be situated at a definite position relative to the object. The vertical plane which is called the picture plane is placed between the object and the eye. Views from the eyes to the object converge to a point in the eye are inclined to the picture plane. the image thus formed is called as a perspective. A perspective is the most realistic three-dimensional representation of objects or spaces. Items are drawn in a way that is similar to how the human eye perceives them. Objects within a space appear smaller as they get further away. Horizontal lines look non-parallel. They appear to converge at an imaginary point in the distance. Perspective in drawing is an approximate representation on a flat surface of an image as it is perceived by the eye. The key concepts here are:
Perspective is the view from a particular fixed viewpoint.
Horizontal and vertical edges in the object are represented by horizontals and verticals in the drawing.
Lines leading away into the distance appear to converge at a vanishing point.
All horizontals converge to a point on the horizon, which is a horizontal line at eye level.
Verticals converge to a point either above or below the horizon.
A perspective drawing is more life-like than oblique or isometric drawings because it diminishes the size of the object as it recedes into the distance. In oblique and isometric drawings the projectors of the sides are parallel, while in perspective they are not parallel. A perspective is the most realistic three-dimensional representation of objects or spaces. Items are drawn in a way that is similar to how the human eye perceives them. Objects within a space appear smaller as they get further away. Horizontal lines look non-parallel. They appear to converge at an imaginary point in the distance.
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