Light-field Particle Image Velocimetry

Shi, Shengxian; New, T. H.; Soria, Julio

doi:10.1007/978-3-031-01779-7_4

Cited by 2 publications

(3 citation statements)

References 34 publications

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“…In the field of intelligent driving, Ding et al [94] combined a light field camera with a spectral think and applied it to distance measurement for unmanned vehicles, and the refocused object distances were in general agreement with the actual distances, with an estimated error between 1.5% and 2.7%. The good dynamic performance has also led to the good application of light field cameras in flow diagnostics [95], and the development and application of light field cameras in fluid measurement were described in great detail by S. Shi [22]. Thirdly, light field cameras can not only acquire images, but also obtain three-dimensional information and, therefore, have strong performance in detection and identification.…”

Section: Measurement Application Of Light Field Cameramentioning

confidence: 99%

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Measurement Technologies of Light Field Camera: An Overview

Hu,

Li,

Miao

et al. 2023

Sensors

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Visual measurement methods are extensively used in various fields, such as aerospace, biomedicine, agricultural production, and social life, owing to their advantages of high speed, high accuracy, and non-contact. However, traditional camera-based measurement systems, relying on the pinhole imaging model, face challenges in achieving three-dimensional measurements using a single camera by one shot. Moreover, traditional visual systems struggle to meet the requirements of high precision, efficiency, and compact size simultaneously. With the development of light field theory, the light field camera has garnered significant attention as a novel measurement method. Due to its special structure, the light field camera enables high-precision three-dimensional measurements with a single camera through only one shot. This paper presents a comprehensive overview of light field camera measurement technologies, including the imaging principles, calibration methods, reconstruction algorithms, and measurement applications. Additionally, we explored future research directions and the potential application prospects of the light field camera.

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Section: Measurement Application Of Light Field Cameramentioning

confidence: 99%

“…To ensure the measurement accuracy and the proper application of the light field camera, it must be designed appropriately. The selection of the parameters of the light field camera was well described by M. Diebold et al [ 21 ] and S. Shi et al [ 22 ]. We introduce it briefly.…”

Section: Imaging Principle Of the Light Field Cameramentioning

confidence: 99%

Measurement Technologies of Light Field Camera: An Overview

Hu,

Li,

Miao

et al. 2023

Sensors

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“…b) Efforts in simplifying the PIV system by new imaging techniques. Light-field and holographic imaging concepts were practiced in light-field PIV [17,18] and holographic PIV, [19] respectively, to resolve the volumetric velocity field with one camera. Such simplicity necessitates precise alignment of optical components (e.g., micro-lens array and image sensor, beam splitter, and holographic plate).…”

Section: Introductionmentioning

confidence: 99%

Meta‐Lens Particle Image Velocimetry

Liu,

Zhao,

et al. 2023

Advanced Materials

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Fluid flow behavior is visualized through particle image velocimetry (PIV) for understanding and studying experimental fluid dynamics. However, traditional PIV methods require multiple cameras and conventional lens systems for image acquisition to resolve multi‐dimensional velocity fields. In turn, it introduces complexity to the entire system. Meta‐lenses are advanced flat optical devices composed of artificial nanoantenna arrays. It can manipulate the wavefront of light with the advantages of ultrathin, compact, and no spherical aberration. Meta‐lenses offer novel functionalities and promise to replace traditional optical imaging systems. Here, a binocular meta‐lens PIV technique is proposed, where a pair of GaN meta‐lenses are fabricated on one substrate and integrated with a imaging sensor to form a compact binocular PIV system. The meta‐lens weigh only 116 mg, much lighter than commercial lenses. The 3D velocity field can be obtained by the binocular disparity and particle image displacement information of fluid flow. The measurement error of vortex‐ring diameter is ≈1.25% experimentally validates via a Reynolds‐number (Re) 2000 vortex‐ring. This work demonstrates a new development trend for the PIV technique for rejuvenating traditional flow diagnostic tools toward a more compact, easy‐to‐deploy technique. It enables further miniaturization and low‐power systems for portable, field‐use, and space‐constrained PIV applications.

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Light-field Particle Image Velocimetry

Cited by 2 publications

References 34 publications

Measurement Technologies of Light Field Camera: An Overview

Measurement Technologies of Light Field Camera: An Overview

Meta‐Lens Particle Image Velocimetry

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