3D Scanning Wiki

Measurement repeatability in 3D scanning

Knowledge Overview Definition

Calling a measurement condition a repeatability condition requires identifying the specified set of repeatability conditions to which it refers.

Definition and meaning

Measurement repeatability is measurement precision evaluated under repeatability conditions.

Precision concerns agreement among repeated indications or measured values for the same or similar objects under specified conditions. It is usually expressed numerically through a measure of dispersion such as standard deviation, variance or coefficient of variation, under those conditions.

Measurement conditions

Repeatability conditions include the same measurement procedure, operators, measuring system, operating conditions and location, with measurements repeated over a short time on the same or similar objects.

Calling a measurement condition a repeatability condition requires identifying the specified set of repeatability conditions to which it refers.

Related concepts and distinctions

Measurement precision is sometimes incorrectly used to mean measurement accuracy. They are distinct concepts.

Further Reading All Entries
  1. What Is 3D Scanning? Principles, Workflow, and Industrial Applications 3D scanning is a digital measurement technology that converts the surface geometry of physical objects into 3D data. This entry covers its working principles, core parameters, industrial use cases, common misconceptions, and related technical…
  2. What Is a 3D Scanner? Types, Parameters, and Selection Criteria A 3D scanner captures three-dimensional surface data from physical objects and converts geometry, dimensions, and features into digital data for inspection, reverse engineering, and modeling.
  3. What Is 3D Scanning Accuracy? Accuracy, Repeatability, and Resolution Explained 3D scanning accuracy describes how closely scan data matches an object's actual geometry and dimensions. It is assessed through local accuracy, volumetric accuracy, stitching accuracy, repeatability, and resolution.
  4. What Is Point Cloud Data? Point Clouds, Meshes, and CAD Models in 3D Scanning Point cloud data is an important raw data format in 3D scanning. It consists of discrete 3D coordinate points that describe object surface geometry and support inspection, reverse engineering, modeling, and archiving.