On the resolution of plenoptic PIV
| Autor: | Yang Zhang, Louis N. Cattafesta, Brian S. Thurow, Eric A. Deem, Timothy W. Fahringer |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
business.industry
Dynamic range Computer science Applied Mathematics Resolution (electron density) Observable 01 natural sciences 010305 fluids & plasmas 010309 optics Optical axis Optics Single camera 0103 physical sciences Fluid dynamics Computer vision Artificial intelligence business Instrumentation Engineering (miscellaneous) Image resolution Light field |
| Zdroj: | Measurement Science and Technology. 27:084003 |
| ISSN: | 1361-6501 0957-0233 |
| Popis: | Plenoptic PIV offers a simple, single camera solution for volumetric velocity measurements of fluid flow. However, due to the novel manner in which the particle images are acquired and processed, few references exist to aid in determining the resolution limits of the measurements. This manuscript provides a framework for determining the spatial resolution of plenoptic PIV based on camera design and experimental parameters. This information can then be used to determine the smallest length scales of flows that are observable by plenoptic PIV, the dynamic range of plenoptic PIV, and the corresponding uncertainty in plenoptic PIV measurements. A simplified plenoptic camera is illustrated to provide the reader with a working knowledge of the method in which the light field is recorded. Then, operational considerations are addressed. This includes a derivation of the depth resolution in terms of the design parameters of the camera. Simulated volume reconstructions are presented to validate the derived limits. It is found that, while determining the lateral resolution is relatively straightforward, many factors affect the resolution along the optical axis. These factors are addressed and suggestions are proposed for improving performance. |
| Databáze: | OpenAIRE |
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