Yazar "Kucak, Ramazan Alper" seçeneğine göre listele

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    AN EXPERIMENTAL APPROACH FOR THE DOCUMENTATION WITH TERRESTRIAL LASER SCANNING OF THE 1035 AD CHURCH OF THE REDEEMER
    (Univ Agean, Dept Mediterranean Stud, 2022) Kucak, Ramazan Alper
    The archaeological site of Ani is located in the city of Kars in northeast Turkey. The archeology area provides a thorough account of the development of medieval architecture and showcases virtually all of the numerous architectural advances that the area experienced between the seventh and thirteenth century AD. The Redeemer Church is one of the architectural monuments of the medieval city of Ani, known as the city of the thousand and one churches or the city with 40 Doors. The Redeemer Church is one of the few structures still standing in Ani from the prosperous Armenian Bagratid era of AD's tenth and eleventh. In this study, the Church, scanned with 3D terrestrial laser scanning technology by World Monument Fund (WMF) partner Solvotek, was modeled and analyzed using an Open Source program (Cloud Compare) and MatLab Program for 3D documentation. The 3D mesh models, the non-uniform rational B-spline (NURBS) surfaces, and the inscriptions of the Church were firstly generated after analyzing the object details measured by Light Detection and Ranging (LiDAR) in this study. Also, a new approach is proposed to automatically extract the surfaces and the inscriptions (such as handwriting and complicated shaped surfaces) of historical artifacts using parametric features. When the results are evaluated, the RANSAC algorithm applied for NURBS surfaces has extracted the surfacial information successfully. Furthermore, the lines were obtained by using geometric features and the inscriptions on the wall both were obtained automatically with available applications, but with new approaches; the newly proposed approaches have shown that they can be applied successfully in cultural heritage studies.
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    Comparative performance analysis of the iPad Pro LiDAR sensor with a professional terrestrial laser scanner
    (Geomatik Journal, 2023) Kucak, Ramazan Alper; Erol, Serdar; Alkan, Reha Metin
    In this study, the scanning and accuracy performance of the Apple iPad Pro LiDAR sensor is investigated comparatively with the performance of a professional Terrestrial Laser Scanner (TLS). In this context, an indoor office containing many objects of different sizes was scanned with the Leica ScanStation C10, a professional scanner, and the Apple iPad Pro LiDAR sensor using together with two different software. After the performed measurements by the scanners, three different 3-Dimensional (3D) point clouds of the work office were produced. The edge lengths of some objects in the office ranging in size from a few cm to 2 meters were measured with a steel tape measure in mm accuracy and these lengths were compared with the values obtained from the point clouds produced from two different scanners. The results of the study showed that a 3D point cloud can be produced with a root mean square error (RMSE) of +/- 0.5 cm in a small indoor environment with a professional scanner. On the other hand, it was observed that the accuracy of the point clouds produced using the iPad Pro LiDAR sensor has +/- 1-1.5 cm RMSE, depending on the software used with it. The first results obtained from this study showed that the Apple iPad Pro LiDAR sensor exhibits promising performance for indoor applications and can be an important alternative to high-cost, geodetic-type professional scanners with its low cost, portability, speed and easy usability.