Název: Amplitude measurement of small displacement using video magnification
Autoři: Řičánek, Dominik
Typ dokumentu: Příspěvky z konference
Jazyk: eng
Nakladatel: Vysoké učení technické v Brně, Fakulta elektrotechniky a komunikačních technologií
Abstrakt: Video magnification algorithms show promising results when used to amplify small vibrations. Measuring these small vibrations is integral in modal analysis of an object and is usually done using specialized vibrometers or accelerometers. Computer vision (CV) systems fall short in this task as the magnitude of the vibrations decreases because of a small SNR (Signal-to-Noise Ratio). In this paper we try to further improve the accuracy of the CV approach by adding video magnification into the image pre-processing stage, allowing the algorithms to measure even imperceptibly small vibrations. For this purpose, we have gather ground truth data with a laser vibrometer in tandem with high speed camera footage of a metal cantilever beam, vibrating in its first mode, and have trained a convolutional neural network for regression.
Klíčová slova: EVM; optical flow; PDV; phase-based; ResNet18
Zdrojový dokument: Proceedings II of the 30st Conference STUDENT EEICT 2024: Selected papers, ISBN 978-80-214-6230-4, ISSN 2788-1334

Instituce: Vysoké učení technické v Brně (web)
Informace o dostupnosti dokumentu: Plný text je dostupný v Digitální knihovně VUT.
Původní záznam: https://hdl.handle.net/11012/249317

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-622500