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See linear perspective for a discussion of one-point, two-point and three-point perspectives. All perspectives on a planar surface have some degree of distortion, similar to the distortion created when portraying the earth's surface on a planar map. See perspective projection distortion for a discussion. Perspective drawing for a paintingImage:Perspective Projection Principle.jpg Perspective Projection A photograph automatically shows a scene with correct perspective for the location of the camera. It follows that an artist wishing to paint a picture of the scene with true perspective needs only to draw an accurate copy of the photograph. If his painting is to be of a different size from that of the photograph he must accurately scale it up or down. This may easily be done by using a proportional divider, sometimes called a Variscaler, set to give the scaling ratio which is required to fit the scene on to his painting support. Perspective terms
See also
it:Prospettiva (matematica) nl:Parallelprojectie vi:Phối cảnh zh:透视投影
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