The circle object detection with the use of Msplit estimation

Janowski, Artur

doi:10.1051/e3sconf/20182600014

Cited by 22 publications

(15 citation statements)

References 18 publications

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“…In terms of methodology, the methods for automatically extracting DBH from TLS data mainly include Hough transform [22,39,40], circle fitting algorithm [41][42][43][44][45][46][47], and cylinder fitting algorithm [42,48,49]. Li [40] used the Hough transform method to detect circles on rasterized point cloud data to estimate DBH and tree height.…”

Section: Introductionmentioning

confidence: 99%

Estimating Individual Tree Height and Diameter at Breast Height (DBH) from Terrestrial Laser Scanning (TLS) Data at Plot Level

Liu

Wang

Dong

et al. 2018

Forests

112

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Abundant and refined structural information under forest canopy can be obtained by using terrestrial laser scanning (TLS) technology. This study explores the methods of using TLS to obtain point cloud data and estimate individual tree height and diameter at breast height (DBH) at plot level in regions with complex terrain. Octree segmentation, connected component labeling and random Hough transform (RHT) are comprehensively used to identify trunks and extract DBH of trees in sample plots, and tree height is extracted based on the growth direction of the trees. The results show that the topography, undergrowth shrubs, and forest density influence the scanning range of the plots and the accuracy of feature extraction. There are differences in the accuracy of the results for different morphological forest species. The extraction accuracy of Yunnan pine forest is the highest (DBH: Root Mean Square Error (RMSE) = 1.17 cm, Tree Height: RMSE = 0.54 m), and that of Quercus semecarpifolia Sm. forest is the lowest (DBH: RMSE = 1.22 cm, Tree Height: RMSE = 1.23 m). At plot scale, with the increase of the mean DBH or tree height in plots, the estimation errors show slight increases, and both DBH and height tend to be underestimated.

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Section: Introductionmentioning

confidence: 99%

Estimating Individual Tree Height and Diameter at Breast Height (DBH) from Terrestrial Laser Scanning (TLS) Data at Plot Level

Liu

Wang

Dong

et al. 2018

Forests

112

View full text Add to dashboard Cite

show abstract

“…to monitor and assess the condition of the structure [19][20][21][22][23][24][25][26][27][28], also in combination with imaging methods and photogrammetry using UAV [29][30][31]. The use of proprietary algorithms in the field of laser scanning [32][33][34] allows to increase the accuracy and analysis of the geometry of objects based on MarLS (marine laser scanning) and MLS (mobile laser scanning) made from inland and port waterways.…”

Section: Discussionmentioning

confidence: 99%

Mobile Laser Scanning Calibration on A Marine Platform

Szulwic

Tysiąc

2018

Polish Maritime Research

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The article describes the method of calibration of the Riegl VMZ-400 mobile scanning system on a floating platform and an experiment aimed at conducting measurements from a previously calibrated instrument. The issue of factors affecting the quality of measurements was discussed. Mobile laser scanning is an increasingly popular measurement solution, but it is still innovative on a European scale. The use of a floating platform is unique on a national scale. The presented solution is the result of the work of the Gdańsk University of Technology team on the development of the measurement procedure for scanning land from the sea and the river.

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“…The next application of the Msplit method was as an estimation method in the context of the analysis of the vertical displacement of geodetic points [24] or for detecting circular objects in a point cloud [25].…”

Section: Introductionmentioning

confidence: 99%

Application of the Msplit Estimation Method in the Detection and Dimensioning of the Displacement of Adjacent Planes

et al. 2020

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Building constructions are exposed to various forces and natural phenomena. Some of them are sudden and violent, e.g., an earthquake or heavy rains, causing a displacement of the ground. Other phenomena affect objects on a longer-term, e.g., vibrations caused by daily road traffic. Sometimes, building structures may have defects due to incorrect construction. In any case, if an engineering object shows changes in the relation to its correct geometry or position, deformation and displacement measurements are required. Engineering objects are also monitored during their construction. Nowadays, it is important to perform measurements quickly and with high accuracy. The use of a Terrestrial Laser Scanning (TLS) allows for the required measurement speed and accuracy. This measurement technology allows a large dataset, which can be arbitrarily elaborated, to be obtained. The structure of building objects can include vertices, lines, planes, and other shapes and can be described using mathematical functions. This allows data processing to be automated. In this article, we present the Msplit method as an effective approach to the processing of data obtained as a result of TLS measurements. The proposed approach is new because until now, the Msplit estimation method has not been used to detect adjacent planes in one-point cloud obtained from TLS. The Msplit estimation method allows a functional model to be split into two or more competitive models and thus two or more entities in a point cloud to be estimated simultaneously. Four different objects measured using TLS are presented: two objects representing vertical displacements and two objects representing horizontal displacements. The test results and analysis confirm that the Msplit estimation method can be successfully applied in the detection of adjacent planes.

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The circle object detection with the use of Msplit estimation

Cited by 22 publications

References 18 publications

Estimating Individual Tree Height and Diameter at Breast Height (DBH) from Terrestrial Laser Scanning (TLS) Data at Plot Level

Estimating Individual Tree Height and Diameter at Breast Height (DBH) from Terrestrial Laser Scanning (TLS) Data at Plot Level

Mobile Laser Scanning Calibration on A Marine Platform

Application of the Msplit Estimation Method in the Detection and Dimensioning of the Displacement of Adjacent Planes

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