Question

Define perspective projection in computer graphics

Answer 1

Answer:

Perspective projection is a type of drawing that graphically approximates on a planar (two-dimensional) surface (e.g. paper) the images of three-dimensional objects so as to approximate actual visual perception. It is sometimes also called perspective view or perspective drawing or simply perspective.

Answer 2

Answer:

Three-dimensional objects are projected on a picture plane using a linear projection technique called perspective projection or perspective transformation. Due to this, distant items look smaller than those that are closer.

Explanation:

The size of the item varies inversely with distance in perspective projection, making the image appear more realistic. The distance from the center of the projection to the projection plane is limited.

Parallel lines do not stay parallel and the angles and distances are not kept. The center of projection, also known as the projection reference point, is where they all come together. The following graphic displays the three different kinds of perspective projections.

• It is straightforward to draw a one-point perspective projection.
• A two-point perspective projection creates a more realistic sense of depth.
• Drawing a three-point perspective projection is particularly challenging.

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