Perspective projection is a technique used in computer graphics and photography to create the illusion of depth on a flat surface. It simulates how objects appear smaller as they get further away from the viewer, mimicking the way our eyes perceive the world. This method involves projecting points from a three-dimensional space onto a two-dimensional plane, such as a screen or a piece of paper. In perspective projection, parallel lines converge at a point called the vanishing point, which is typically located on the horizon line. This effect helps to create a realistic representation of space, making it easier for viewers to understand the relative positions and sizes of objects. Artists and designers often use perspective projection to enhance the visual impact of their work.