point cloud

Syllable breakdown

Dictionary meaning

a set of data points in three-dimensional coordinate space, each representing a location on the surface of a scanned object or environment, produced by sensors including lidar, structured light scanners, stereo cameras, and time-of-flight depth cameras; a point cloud captures the spatial geometry of a scene or object as millions of discrete (x, y, z) coordinate triplets — and often additional attributes such as colour, intensity, or surface normal direction — without requiring explicit surface connectivity information; in robotics and autonomous vehicles, point clouds from lidar sensors are used for obstacle detection, terrain mapping, SLAM, and object recognition; processing point clouds involves filtering noise, registering multiple scans into a common coordinate frame, segmenting points into objects and ground plane, and fitting geometric models to point clusters; deep learning architectures including PointNet operate directly on unordered point cloud data

Examples

• The lidar sensor generates a 360-degree point cloud of the surrounding environment at 10 Hz, capturing the geometry of vehicles and pedestrians in real time.
• Point cloud registration aligned multiple scans taken from different viewpoints into a single complete 3D model of the archaeological site.