Types of Projection in Computer Graphics

Parallel Projection:

When the centre of projection is situated at an infinite distance such that the projectors are parallel to each other, the type of projection is called Parallel Projection.
Parallel Projection

In Parallel Projection, image points are found at the intersection of the view plane with parallel projectors drawn from the object points in a fixed direction. The two basic types of parallel projection are:
1. Orthographic Projection
2. Oblique Projection

Perspective Projection:

A Perspective Projection of a 3D object, we transform points along projection lines which are not parallel to each other and coverage to meet at a finite point that is called Projection Reference Point or Center of Projection.
Perspective Projection