Results 31 to 40 of about 4,650,387 (294)

Multi-Feature Registration of Point Clouds

open access: yesRemote Sensing, 2017
Light detection and ranging (LiDAR) has become a mainstream technique for rapid acquisition of 3-D geometry. Current LiDAR platforms can be mainly categorized into spaceborne LiDAR system (SLS), airborne LiDAR system (ALS), mobile LiDAR system (MLS), and
Tzu-Yi Chuang, Jen-Jer Jaw
doaj   +1 more source

An Improved Point Clouds Model for Displacement Assessment of Slope Surface by Combining TLS and UAV Photogrammetry

open access: yesApplied Sciences, 2022
TLS can quickly and accurately capture object surface coordinates. However, TLS point clouds cannot cover the entire surface of the target object, due to block of view and limitation of measurement condition.
He Jia   +5 more
doaj   +1 more source

Reconstruction of industrial piping installations from laser point clouds using profiling techniques [PDF]

open access: yes, 2009
Includes abstract.Includes bibliographical references (leaves 143-152).As-built models of industrial piping installations are essential for planning applications in industry. Laser scanning has emerged as the preferred data acquisition method of as built
Mapurisa, Willard T
core   +1 more source

A partial overlapping point cloud registration method based on dynamic feature matching

open access: yesDianxin kexue, 2021
The point cloud registration method can effectively complete the registration of point clouds with different overlap rates and various sizes, and ensure the accuracy of the 3D reconstruction model.To address the above issues, a partial overlapping point ...
Hui DU   +3 more
doaj   +2 more sources

Clouds, photolysis and regional tropospheric ozone budgets. [PDF]

open access: yes, 2009
We use a three-dimensional chemical transport model to examine the shortwave radiative effects of clouds on the tropospheric ozone budget. In addition to looking at changes in global concentrations as previous studies have done, we examine changes in ...
Wild, Oliver   +4 more
core   +5 more sources

Ridge-Valley-Guided Sketch-Drawing From Point Clouds

open access: yesIEEE Access, 2018
Sketch-drawing is one of the simplest and most direct means to illustrate 3-D objects. It can not only present geometric features, but also greatly facilitate us to identify and understand the object.
Yinghui Wang   +8 more
doaj   +1 more source

Enriched Semantic 3D Point Clouds: An Alternative to 3D City Models for Digital Twin for Cities?

open access: yes, 2023
Digital Twins (DTs) for cities represent a new trend for city planning and management, enhancing three-dimensional modeling and simulation of cities. While progress has been made in this research field, the current scientific literature mainly focuses on
Jeddoub, Imane   +3 more
core   +1 more source

Picking Towels in Point Clouds

open access: yesSensors, 2019
Picking clothing has always been a great challenge in laundry or textile industry automation, especially when some clothes are of the same colors, material and entangled with each other.
Xiaoman Wang   +5 more
doaj   +1 more source

EXTRACTION AND SHAPE RECONSTRUCTION OF GUARDRAILS USING MOBILE MAPPING DATA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
The mobile mapping system (MMS) can acquire dense point-clouds of roads and roadside features. Roads are often separated into roadways and walkways in many urban areas. Since guardrails are installed to separate roadways and sidewalks, it is important to
H. Matsumoto, Y. Mori, H. Masuda
doaj   +1 more source

Ultrathin Tropical Tropopause Clouds (UTTCs) : I. Cloud morphology and occurrence [PDF]

open access: yes, 2003
Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last efficient point of contact of the gas phase with the ice
V. A. Yushkov   +91 more
core   +2 more sources

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