Precise Photogrammetric Reconstruction Using Model-Based Image Fitting for 3D Beam Deformation Monitoring

Kwak, Eunju; Detchev, Ivan; Habib, Ayman; El-Badry, Mamdouh; Hughes, C.J.

doi:10.1061/(asce)su.1943-5428.0000105

Cited by 41 publications

(23 citation statements)

References 25 publications

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“…The realization of the model in the imagery is the model's bounding edges derived through the Canny edge detector (Canny, 1986). It should be noted that each model was simultaneously adjusted in as many images as it appeared in, which increased the redundancy and thus the reliability of the solution (Kwak et al, 2013). …”

Section: Model-based Image Fitting For 3d Positioning Of Rectangular mentioning

confidence: 99%

“…It is referred to as model-based image fitting, and it recovers the position of rectangular features in all three dimensions (Kwak et al, 2013).…”

Section: Model-based Image Fitting For 3d Positioning Of Rectangular mentioning

confidence: 99%

“…The relationship between the model coordinates of the rectangle vertices and their object space equivalents are expressed in equation (8): Figure 9. Definition of the object and model space coordinate systems, and the pose and shape parameters of a rectangular model (after Kwak et al (2013))…”

Section: Model-based Image Fitting For 3d Positioning Of Rectangular mentioning

confidence: 99%

See 2 more Smart Citations

Structural 3d Monitoring Using a New Sinusoidal Fitting Adjustment

Detchev¹,

Habib²,

Lichti³

et al. 2016

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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Commission V, WG V/1 KEY WORDS: close range photogrammetry, dynamic loading, precise 3D reconstruction, image and point cloud processing, model-based image fitting, vertical deflections, planimetric displacements ABSTRACT:Digital photogrammetric systems combined with image processing techniques have been used for structural monitoring purposes for more than a decade. For applications requiring sub-millimetre level precision, the use of off-the-shelf DSLR cameras is a suitable choice, especially when the low cost of the involved sensors is a priority. The disadvantage in the use of entry level DSLRs is that there is a trade-off between frame rate and burst rate -a high frame rate is either not available or it cannot be sustained long enough. This problem must be overcome when monitoring a structural element undergoing a dynamic test, where a range of loads are cycled through multiple times a second. In order to estimate deflections during such a scenario, this paper proposes a new least-squares adjustment for sinusoidal fitting. The new technique is capable of processing multiple back-to-back bursts of data within the same adjustment, which synthetically increases the de-facto temporal resolution of the system. The paper describes a beam deformation test done in a structures laboratory. The experimental results were assessed in terms of both their precision and accuracy. The new method increased the effective sampling frequency three-fold, which improved the standard deviations of the estimated parameters with up to two orders of magnitude. A residual RMSE as low as 30 µm was attained, and likewise the RMSE of the computed amplitudes between the photogrammetric system and the control laser transducers was as small as 34 µm.

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Section: Model-based Image Fitting For 3d Positioning Of Rectangular mentioning

confidence: 99%

“…It is referred to as model-based image fitting, and it recovers the position of rectangular features in all three dimensions (Kwak et al, 2013).…”

Section: Model-based Image Fitting For 3d Positioning Of Rectangular mentioning

confidence: 99%

See 1 more Smart Citation

Structural 3d Monitoring Using a New Sinusoidal Fitting Adjustment

Detchev¹,

Habib²,

Lichti³

et al. 2016

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…Photogrammetric outputs were compared against the results obtained from the LVDTs to validate the deformation and displacement of beam and columns. Kwak et al (2013) achieved submillimeter accuracy for the calculation of both vertical deflections and horizontal displacements to unite two methodologies of photogrammetric reconstructionimage-matching-based reconstruction and model-based image fitting.…”

Section: Introductionmentioning

confidence: 99%

Photogrammetric Approach in Determining Beam-Column Connection Deformations

et al. 2014

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In accordance with the advances in technology, displacement calculation techniques are ever developing. Photogrammetry has become preferable in some new disciplines with the advances in the image processing methods. In this study, the authors have used two different measurement techniques to determine the angles of rotation in beam-column connections that are subjected to reversible cyclic loading. The first of these is the method that is widely used, the conventional method in structural mechanics experiments, where Linear Variable Differential Transformers (LVDTs) are utilized; and the second is the photogrammetric measurement technique. The rotation angles were determined using these techniques in a total of ten steel beam-column connection experiments. After discussing the test procedures of the aforementioned methods, the results were presented. It was observed that the rotation angles measured by each method were very close to each other. It was concluded that the photogrammetric measurement technique could be used as an alternative to conventional methods, where electronic LVDTs are used. Koken, A. et al. Bol. Ciênc. Geod., sec. Artigos, Curitiba, v. 20, n o 3, p.720-733, jul-set, 2014. 2 1Keywords: Photogrammetry; Beam-Column Connection; Rotation. RESUMO De acordo com os avanços em tecnologia, técnicas de cálculo de deslocamentos estão sempre se desenvolvendo. A Fotogrametria tem se tornado a ferramenta preferida em algumas novas disciplinas com os avanços dos métodos de processamento de imagem. Neste estudo, os autores usaram duas técnicas de medidas distintas para determinar os ângulos de rotação em conexões de colunasde-vigas, as quais estão sujeitas a cargas cíclicas reversíveis. O primeiro destes é método é amplamente usado, o método convencional em experimentos mecânicos estruturais, onde transformações diferenciais de variáveis lineares são usados (LVDTs), e o segundo é a técnica de medição fotogramétrica. Os ângulos de rotação foram determinados usando esta técnica num total de 10 experimentos de conexão coluna-de-viga de aço. Após ma discussão dos procedimentos dos métodos mencionados, os resultados foram apresentados. Foi osbservado que os ângulos de rotção medidos por cada método foram muito semelhantes, Conclui-se que a técnica de medição fotogramétrica poderia ser usada como alternativa para os métodos convencionais, onde as transformações direfenciais de variáveis lineares (LVDTs) são usadas. Palavras-chave: Fotogrametria; Conexões de coluna-de-viga; Rotação.

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“…In recent years, accurate 3D surface reconstruction has been noticed as one of the most important necessities of different mapping and monitoring applications such as urban planning [1], environmental monitoring [2], infrastructure monitoring [3], cultural heritage documentation [4], indoor localization [5], and disaster management [6]. Considering the requirements of these applications, the required data for 3D surface reconstruction are usually acquired using different passive and active digital imaging systems mounted on static or mobile airborne and terrestrial platforms.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Realistic 3D Reconstruction of Planar Surfaces from Laser Scanning Data and Imagery Collected Onboard Modern Low-Cost Aerial Mapping Systems

2017

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Abstract:Over the past few years, accurate 3D surface reconstruction using remotely-sensed data has been recognized as a prerequisite for different mapping, modelling, and monitoring applications. To fulfill the needs of these applications, necessary data are generally collected using various digital imaging systems. Among them, laser scanners have been acknowledged as a fast, accurate, and flexible technology for the acquisition of high density 3D spatial data. Despite their quick accessibility, the acquired 3D data using these systems does not provide semantic information about the nature of scanned surfaces. Hence, reliable processing techniques are employed to extract the required information for 3D surface reconstruction. Moreover, the extracted information from laser scanning data cannot be effectively utilized due to the lack of descriptive details. In order to provide a more realistic and accurate perception of the scanned scenes using laser scanning systems, a new approach for 3D reconstruction of planar surfaces is introduced in this paper. This approach aims to improve the interpretability of the extracted planar surfaces from laser scanning data using spectral information from overlapping imagery collected onboard modern low-cost aerial mapping systems, which are widely adopted nowadays. In this approach, the scanned planar surfaces using laser scanning systems are initially extracted through a novel segmentation procedure, and then textured using the acquired overlapping imagery. The implemented texturing technique, which intends to overcome the computational inefficiency of the previously-developed 3D reconstruction techniques, is performed in three steps. In the first step, the visibility of the extracted planar surfaces from laser scanning data within the collected images is investigated and a list of appropriate images for texturing each surface is established. Successively, an occlusion detection procedure is carried out to identify the occluded parts of these surfaces in the field of view of captured images. In the second step, visible/non-occluded parts of the planar surfaces are decomposed into segments that will be textured using individual images. Finally, a rendering procedure is accomplished to texture these parts using available images. Experimental results from overlapping laser scanning data and imagery collected onboard aerial mapping systems verify the feasibility of the proposed approach for efficient realistic 3D surface reconstruction.

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Precise Photogrammetric Reconstruction Using Model-Based Image Fitting for 3D Beam Deformation Monitoring

Cited by 41 publications

References 25 publications

Structural 3d Monitoring Using a New Sinusoidal Fitting Adjustment

Structural 3d Monitoring Using a New Sinusoidal Fitting Adjustment

Photogrammetric Approach in Determining Beam-Column Connection Deformations

A New Approach for Realistic 3D Reconstruction of Planar Surfaces from Laser Scanning Data and Imagery Collected Onboard Modern Low-Cost Aerial Mapping Systems

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