Testing and Performance Evaluation of Fixed Terrestrial 3D Laser Scanning Systems for Highway Applications Authors
Testing and Performance Evaluation of Fixed Terrestrial 3D Laser Scanning Systems for Highway Applications Authors
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发表时间：
2009
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通讯作者：
Jagannath Hiremagalur;T. Lasky
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文献类型：
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作者：
Jagannath Hiremagalur;T. Lasky
ABSTRACT In many 3D laser scanner applications, high relative precision (relative dimensions within the registered point cloud) is sufficient; in contrast, DOT applications require good relative precision and high absolute accuracy. Thus, precise and robust geo-referencing is critical, and robust workflows are needed to reduce the likelihood and impact of human errors. DOT applications have a fairly unique combination of challenges, including longer range requirements, long linear geometry for complete jobs, tall structures, and dark pavement scanned at high incidence angle. These factors motivate standardized protocols and metrics for characterizing and evaluating scanner performance and to develop confidence limits for the scanner data in DOT applications. The paper’s primary contribution is a set of vendor-neutral standard test protocols for the characterization and evaluation of 3D laser scanner performance, which users can conduct in easily accessible facilities. These evaluations focused on issues significant in DOT survey applications, workflows, and data flows. Example performance evaluation is provided for several commercially available 3D laser scanners. This paper provides the needed scientific basis for data-driven deployment of this valuable measurement tool. The paper also provides recommendations and guidelines which will promote consistent and correct use of 3D laser scanners by DOTs and their contractors. The guidelines clarify the common limitations of 3D laser scanners and recommend mitigation methods; this will help engineers and surveyors to select the right scanner and determine optimum scanning settings for survey applications.
