Bisector-Based Tracking of In Plane Subpixel Translations and Rotations

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Title: Bisector-Based Tracking of In Plane Subpixel Translations and Rotations
Authors: Espinosa Tomás, Julián | Pérez Rodríguez, Jorge | Ferrer, Belén | Vázquez Ferri, Carmen | Mas, David
Research Group/s: Óptica y Ciencias de la Visión | Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES)
Center, Department or Service: Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Departamento de Ingeniería Civil | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías
Keywords: Object tracking | Image processing | Subpixel accuracy | Deflection dynamics
Knowledge Area: Óptica | Mecánica de Medios Continuos y Teoría de Estructuras
Issue Date: 14-Aug-2017
Publisher: MDPI
Citation: Espinosa J, Pérez J, Ferrer B, Vázquez C, Mas D. Bisector-Based Tracking of In Plane Subpixel Translations and Rotations. Applied Sciences. 2017; 7(8):835. doi:10.3390/app7080835
Abstract: We present a method for distance measuring planar displacements and rotations with image processing methods. The method is based on tracking the intersection of two non-parallel straight segments extracted from a scene. This kind of target can be easily identified in civil structures or in industrial elements or machines. Therefore, our method is suitable for measuring the displacement in some parts of structures and therefore for determining their stress state. We have evaluated the accuracy of our proposal through a computational simulation and validated the method through two lab experiments. We obtained a theoretical mean subpixel accuracy of 0.03 px for the position and 0.02 degrees for the orientation, whereas the practical accuracies were 0.1 px and 0.04 degrees, respectively. One presented lab application deals with the tracking of an object attached to a rotation stage motor in order to characterize the dynamic of the stage, and another application is addressed to the noncontact assessment of the bending and torsional process of a steel beam subjected to load. The method is simple, easy to implement, and widely applicable.
URI: http://hdl.handle.net/10045/68772
ISSN: 2076-3417
DOI: 10.3390/app7080835
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: http://dx.doi.org/10.3390/app7080835
Appears in Collections:INV - OCIVIS - Artículos de Revistas
INV - GRESMES - Artículos de Revistas

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