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Master's Thesis
Author of thesis: Ing. Dávid Dolobáč
Acad. year: 2023/2024
Supervisor: Ing. Miloslav Richter, Ph.D.
Reviewer: Ing. Ilona Janáková, Ph.D.
This thesis sets itself the task to detect geometric changes, located on a previously known route, which is considered as a template or pattern. Geometric changes represent rigid transformations of objects in a scene, specifically their rotation, displacement and their combinations. Another type of change is the addition of new or removal of original objects. The original route is captured with a monocular camera and by using methods of photogrammetry, a 3D model of a scene in a point representation is reconstructed from the video sequence. In the same manner, a 3D model of the scene containing changes is created, but this model captures only the local section of the original route. This local point cloud is registered in the 3D model of the original route, so that the 3D models can be directly compared with each other. The investigated space is divided into cubic voxels of the same size which are successively traversed and the degree of similarity of local surfaces is investigated for each of them. The solution results in 3D points from both clouds marked as changed or unchanged. The mentioned methods are tested on real data in scenarios with different geometric modifications of the scene and the evaluation of change detection is implemented as in the case of a binary classifier.
change detection, voxel, surface normals, orientation histogram, photogrammetry, camera calibration, 3D reconstruction, point cloud, 3D model, registration, localization, MATLAB
Date of defence
05.06.2024
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Process of defence
Student obhájil diplomovou práci. Komise neměla žádné námitky k řešené práci. V průběhu odborné rozpravy odpověděl na dotazy: Doplňující otázku týkající se detekce změn student zodpověděl bez výhrad. Doplňující otázku týkající se množství voxelů v okolí student zodpověděl bez výhrad. Doplňující otázku týkající se osvětlení scény student zodpověděl
Language of thesis
Slovak
Faculty
Fakulta elektrotechniky a komunikačních technologií
Department
Department of Control and Instrumentation
Study programme
Cybernetics, Control and Measurements (MPC-KAM)
Composition of Committee
doc. Ing. Jan Mikulka, Ph.D. (předseda) doc. Ing. Petr Blaha, Ph.D. (místopředseda) Ing. Jiří Fialka, Ph.D. (člen) Ing. Miloslav Richter, Ph.D. (člen) Ing. Soňa Šedivá, Ph.D. (člen) Ing. Soběslav Valach (člen)
Supervisor’s reportIng. Miloslav Richter, Ph.D.
Grade proposed by supervisor: A
Reviewer’s reportIng. Ilona Janáková, Ph.D.
Grade proposed by reviewer: A
Responsibility: Mgr. et Mgr. Hana Odstrčilová