Topic
Light field
About: Light field is a research topic. Over the lifetime, 5357 publications have been published within this topic receiving 87424 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: This work analyzes the sampling patterns of the LFM, and introduces a flexible light field point spread function model (LFPSF) to cope with arbitrary LFM designs, and proposes a novel aliasing-aware deconvolution scheme to address the sampling artifacts.
Abstract: The sampling patterns of the light field microscope (LFM) are highly depth-dependent, which implies non-uniform recoverable lateral resolution across depth. Moreover, reconstructions using state-of-the-art approaches suffer from strong artifacts at axial ranges, where the LFM samples the light field at a coarse rate. In this work, we analyze the sampling patterns of the LFM, and introduce a flexible light field point spread function model (LFPSF) to cope with arbitrary LFM designs. We then propose a novel aliasing-aware deconvolution scheme to address the sampling artifacts. We demonstrate the high potential of the proposed method on real experimental data.
41 citations
TL;DR: In this article, a new way of amplifying light without population inversion was proposed, based on the discovery of resonant superradiant emission from an atomic ensemble interacting with a driving light field.
Abstract: Light amplification in lasers usually relies on populating higher energy levels with more light emitters than lower energy levels. Scientists propose a new way of amplifying light without such population inversion, based on their discovery of resonant superradiant emission from an atomic ensemble interacting with a driving light field.
41 citations
TL;DR: A novel active method involving ray calibration and phase mapping, to achieve SLF 3D reconstruction, and derived the phase mapping in the SLF that spatial coordinates can be directly mapped from phase.
Abstract: In previous work, we presented a structured light field (SLF) method combining light field imaging with structured illumination to perform multi-view depth measurement. However, the previous work just accomplishes depth rather than 3D reconstruction. In this paper, we propose a novel active method involving ray calibration and phase mapping, to achieve SLF 3D reconstruction. We performed the ray calibration for the first time to determine each light field ray with metric spatio-angular parameters, making the SLF realize multi-view 3D reconstruction. Based on the ray parametric equation, we further derived the phase mapping in the SLF that spatial coordinates can be directly mapped from phase. A flexible calibration strategy was correspondently designed to determine mapping coefficients for each light field ray, achieving high-efficiency SLF 3D reconstruction. Experimental results demonstrated that the proposed method was suitable for high-efficiency multi-view 3D reconstruction in the SLF.
40 citations
TL;DR: A hybrid head-mounted display system that is based on a liquid crystal microlens array that can be divided into light field and two-dimensional modes to show comfortable 3D images with high resolution compensated by the 2D image.
Abstract: In recent years, head-mounted display technologies have greatly advanced. In order to overcome the accommodation-convergence conflict, light field displays reconstruct three-dimensional (3D) images with a focusing cue but sacrifice resolution. In this paper, a hybrid head-mounted display system that is based on a liquid crystal microlens array is proposed. By using a time-multiplexed method, the display signals can be divided into light field and two-dimensional (2D) modes to show comfortable 3D images with high resolution compensated by the 2D image. According to the experimental results, the prototype supports a 12.28 ppd resolution in the diagonal direction, which reaches 82% of the traditional virtual reality (VR) head-mounted display (HMD).
40 citations
TL;DR: This paper presents research on the dynamic adaptive streaming of light field video, and carries out a series of subjective tests, where test participants were shown light field videos containing stallings and switches in spatial and angular resolution.
Abstract: Light field visualization has progressed and developed significantly in the past years. At the time of this paper, light field displays are utilized in the industry and they are commercially available as well. Although their appearance on the consumer market is approaching, many potential applications of light field technology have not yet been addressed, such as video streaming. In this paper, we present our research on the dynamic adaptive streaming of light field video. In order to evaluate the presented concept of quality switching, we carried out a series of subjective tests, where test participants were shown light field videos containing stallings and switches in spatial and angular resolution.
40 citations