Using color-only vegetation indexes to remove vegetation from otherwise mostly mono-material point clouds

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00364333" target="_blank" >RIV/68407700:21110/22:00364333 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.46544/AMS.v27i4.20" target="_blank" >https://doi.org/10.46544/AMS.v27i4.20</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.46544/AMS.v27i4.20" target="_blank" >10.46544/AMS.v27i4.20</a>

Result language

angličtina

Original language name

Using color-only vegetation indexes to remove vegetation from otherwise mostly mono-material point clouds

Original language description

Point clouds are now a standard way of describing objects in many engineering disciplines, whether they are man-made objects such as structures, buildings, or various types of structures. Commonly used methods of acquiring such data include ground, UAV, or even aerial photogrammetry, followed by terrestrial, UAV, and aerial scanning. After measurement (by the scanner) or calculation (from photogrammetry), the point cloud goes through extensive processing that essentially transforms the unordered mass of points into a usable data set. One of the important steps is removing points representing obstructing objects and features, including vegetation in particular. Here, many filtering methods based on different principles are available and suitable for application to different scenes. This paper presents a new method of filtering point clouds based on the visible spectrum color principle using vegetation indexes determined from RGB system colors only. Since each sensor has to some extent, an individual interpretation of the colors, it cannot be assumed to determine specific boundaries of what is and is no longer vegetation. Therefore, it was proposed to use means clustering to simplify the operator's work. The method was also designed in such a way that the entire evaluation could be implemented in the freely available CloudCompare software. The procedure was tested on three different sites with different terrain and vegetation characteristics showing, which demonstrated the applicability of this method to data where the color information (green) uniquely identifies vegetation. The selected vegetation filters ExG, ExR, ExB, and ExGr were tested, where ExG was the best. Kmeans clustering helps an operator to distinguish more easily between vegetation and the rest of the point cloud without compromising the quality of the result. The method is practically implementable using the freely downloadable and usable CloudCompare software.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/CK03000168" target="_blank" >CK03000168: Intelligent methods of digital data acquisition and analysis for bridge inspections</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Montanistica Slovaca

ISSN

1335-1788

e-ISSN

—

Volume of the periodical

27

Issue of the periodical within the volume

4

Country of publishing house

SK - SLOVAKIA

Number of pages

13

Pages from-to

1089-1101

UT code for WoS article

000956037000014

EID of the result in the Scopus database

2-s2.0-85149254367