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3D modelling of historic buildings based on integrated data from airborne and terrestrial laser scanning

Kwoczyńska Bogusława, Nowak Kinga, Woźniak Krzysztof

Geomatics, Landmanagement and Landscape

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2023

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no. 4

259--273

EN

Currently, the modelling of historic buildings is most often performed on the basis of data obtained by terrestrial laser scanning. It ensures both the speed of information acquisition and the high accuracy of the final elaboration. However, there are situations in which the terrain layout or the structure of the building limits the possibility of obtaining full information on its shape. In such situations, the solution is to integrate data from various measurement devices. In the case of creating a full 3D model of large buildings, one of the ways to supplement the data, especially the roof of the building, is to use data from airborne laser scanning. The research used the integration of airborne laser scanning data with data recorded with the Leica ScanStation P40 terrestrial laser scanner. Combined point clouds were used for 3D modelling of two different historic buildings in Krakow. Modelling was performed with the Bentley CAD software and in Leica Cyclon 3DR and 3DReshaper. The accuracy of data integration was determined and the advantages and disadvantages of using the above-mentioned software for 3D modelling of architectural objects were shown. The result of the study is a 3D model of St. Florian’s Gate and the Palace of Art in Krakow.

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Analiza numeryczna wpływu resekcji krtani na własności wytrzymałościowe odcinka szyjnego kręgosłupa

Chorąży Patrycja, Chojnacka-Brożek Agnieszka, Woźniak Krzysztof

Aktualne Problemy Biomechaniki

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2021

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z. 21

5--10

PL

Głównym celem niniejszego artykułu było przedstawienie zależności pomiędzy dysfunkcjami w obrębie odcinka szyjnego kręgosłupa, a stabilnością głowy pacjenta, który dodatkowo został poddany resekcji krtani wskutek postępującego nowotworu złośliwego. Badanie pozwoliło określić jaki wpływ na położenie środka ciężkości głowy oraz na mechanizmy obciążeń ma obecność krtani bądź jej brak, dzięki analizie numerycznej zdrowego pacjenta.

EN

The main purpose of this thesis was to show dependencies between disfunctions in the cervical spine area and a stability of the head of a patient, who was additionally subjected to larynx resection due to malignant tumor. The examination allowed to determine whether presence or absence of a larynx has an impact on the location of the head’s center of gravity and mechanisms of loads; this was achieved by means of numerical analysis carried out on a healthy patient.

3

MarQR technology for measuring relative displacements of building structure elements with regard to joints and cracks

Woźniak Marek, Woźniak Krzysztof

Reports on Geodesy and Geoinformatics

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2020

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Vol. 109

33--40

EN

The article presents an original optical system to measure displacements across joints or cracks in building structures. It describes the concept of system operation, algorithms to be followed and results of practical tests that have been performed. The proposed solution is based on digital photos taken with a non-metric digital camera, modified by defining its internal orientation elements and correction of lens distortion during calibration, constituting the measurement instrument registering the pictures of markers. QR (Quick Response) codes are proposed to be the markers. Being digitally processed, a set of registered images allow visualising the measured size of occurred displacements. Owing to this solution, it is possible to obtain data on a mutual position of two or more QR codes in the form of translation elements in 3D space and appropriate three orientation angles. Appointed elements are unequivocal in spatial interpretation and not limited by dimension. As the tests performed by the authors show, the results are more than satisfactory. The proposed measurement technology is an objective system of data acquisition, suitable for automating the whole monitoring process of displacements of building structure elements concerning joints and cracks.