Liikeparallaksia

Liikeparallaksia, also known as motion parallax, is a monocular depth cue that describes the apparent difference in the speed of movement of objects at different distances from an observer. When an observer moves, objects closer to them appear to move faster and in the opposite direction of the observer's motion, while objects farther away appear to move slower and in the same direction. This phenomenon is a result of the change in the observer's perspective as they move through space.

The principle of motion parallax is commonly experienced during travel. For example, when a person is in a car, nearby objects like fence posts or trees seem to rush past quickly, while distant mountains or clouds appear to move very slowly or remain relatively stationary. This differential speed provides the brain with information about the relative distances of these objects without the need for binocular vision.

This depth perception cue is particularly important in environments where binocular cues are limited, such as in driving or when viewing a single image. Artists and filmmakers often utilize the principles of motion parallax to create a sense of depth and realism in their work. In computer graphics and virtual reality, motion parallax is a fundamental technique for simulating realistic three-dimensional environments and enhancing the user's sense of immersion. The larger the parallax angle, the closer the object is perceived to be.