What is 3D vision?

3D vision refers to the ability of a system (often a computer or robot) to perceive and understand the three-dimensional structure of a scene from images or videos. It involves capturing depth information, either actively (e.g., using structured light or time-of-flight sensors) or passively (e.g., through stereo vision or monocular depth estimation), and then processing this data to create a 3D representation. This technology is commonly used in robotics for navigation and object manipulation, in autonomous vehicles for scene understanding, in medical imaging for visualization and diagnosis, and in augmented reality for overlaying virtual objects onto the real world.