Can I read Phase-based vibration imaging for structural dynamics applications: Marker-free full-field displacement measurements with confidence measures on EtoBox?
Phase-based vibration imaging for structural dynamics applications: Marker-free full-field displacement measurements with confidence measures by Yinan Miao; Yeseul Kong; Hyeonwoo Nam; Seunghwan Lee; Gyuhae Park is a Engineering article available to read on EtoBox.
What is Phase-based vibration imaging for structural dynamics applications: Marker-free full-field displacement measurements with confidence measures about?
Inspired by the concept of thermal imaging, we develop a phase-based vibration imaging technique using marker-free full-field displacement measurements, which aims to determine vibrational energy distribution and possibly vibration parameters as the thermal imaging determining thermal energy distribution using colormap. In this study, accurate full-field measurements are conducted at the sub-pixel level by performing a full-field phase-based optical flow with three novel progresses. First, an image-preprocessing Gaussian smoothing gradient is applied to reduce the nonlinear phase caused by homogenous patterns and image noise. Second, two confidence measures (phase nonlinearity and filter response) are adopted to obtain reliable displacement measurements estimated from the multi-scale and multi-direction phases. Third, the combination of vector average and the intersection of constraints ensure the accuracy of integrating every pixel’s displacement components. The vibrations can then be imaged by analyzing the acquired full-field displacements using techniques such as mean absolute deviation and frequency analyses. The capability of the proposed technique is demonstrated through num
Who reads Phase-based vibration imaging for structural dynamics applications: Marker-free full-field displacement measurements with confidence measures?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Yinan Miao; Yeseul Kong; Hyeonwoo Nam; Seunghwan Lee; Gyuhae Park
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)