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Creators/Authors contains: "Sapkota, Bibek"

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  1. ; ; ; (, Journal of Fluids and Structures)
    Full Text Available 
  2. ; ; ; (, Proceedings of the 15th International Symposium on Particle Image Velocimetry)
    This paper presents a comparison of several correlation-based methodologies for depth estimation using a single plenoptic camera. The plenoptic camera offers a distinct advantage by enabling the generation of many perspectives over a relatively small baseline. Unlike stereo reconstruction, which relies on a pair of images for depth estimation, these multiple perspectives are utilized collectively in two distinct approaches for depth estimation. The proposed methods are evaluated using synthetic and experimental data to assess their accuracy. Preliminary results indicate the robust performance of both methods, each exhibiting different strengths under varying conditions. Future work will assess how these methods perform in the context of a simultaneous DIC and 3D PIV measurement using a single plenoptic camera. 
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    Accepted Manuscript Full Text Available
  3. ; ; ; (, 14th International Symposium on Particle Image Velocimetry)
    This paper investigates the effect of smoothing operation in 3D reconstruction using a plenoptic camera. A plenoptic camera - also known as light field camera - features a commercial off the shelf camera with added microlens array (MLA) behind the imaging lens, directly in front of the sensor. The main lens focuses the light to the MLA plane, where each microlens then re-directs the light to small regions of pixels behind, each pixel corresponding to different angle of incident (T. Fahringer (2015)) (Adelson and Wang (1992)). Thus, MLA encodes angular information of incident light rays into the recorded image that assist to acquire 4D information (u,v,s,t) of light-field including both position and angular information of light rays captured by the camera (Ng et al. (2005)) (Adelson and Wang (1992)). 
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    Full Text Available