Utilizing a Terrestrial Laser Scanner for 3D Luminance Measurement of Indoor Environments

Area of Science:

• Photogrammetry and Remote Sensing
• Computer Vision
• Optical Engineering

Background:

• Traditional 3D data acquisition methods often lack integrated luminance information.
• High dynamic range (HDR) imaging is crucial for capturing wide ranges of light intensity.
• Terrestrial Laser Scanning (TLS) provides precise geometric data but typically not luminance.

Purpose of the Study:

• To present a novel method for measuring 3D luminance point clouds.
• To integrate high dynamic range (HDR) panoramic camera systems with TLS instruments.
• To enable simultaneous measurement of 3D geometry and luminance.

Main Methods:

• Utilizing an integrated HDR panoramic camera system within a TLS instrument.
• Developing a luminance calibration procedure for the laser scanner.
• Assessing laboratory-based accuracy, color properties, and dynamic range of luminance measurements.

Main Results:

• Successful calibration of a TLS instrument for luminance measurements.
• Demonstration of the 3D luminance measurement process through a case study.
• Characterization of the system's accuracy, color fidelity, and dynamic range in a controlled environment.

Conclusions:

• The presented method provides a direct, integrated data source for 3D luminance.
• TLS instruments can be adapted for simultaneous geometric and luminance data collection.
• The study discusses current TLS capabilities and limitations for luminance measurement applications.