Results 151 to 160 of about 5,929,903 (194)
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Light field projection for lighting reproduction
2015 IEEE Virtual Reality (VR), 2015We propose a novel approach to generate 4D light field in the physical world for lighting reproduction. The light field is generated by projecting lighting images on a lens array. The lens array turns the projected images into a controlled anisotropic point light source array which can simulate the light field of a real scene.
Zhong Zhou +4 more
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Light field display simulation for light field quality assessment
SPIE Proceedings, 2015We introduce our light field display simulation software that simulates the image observed by a viewer looking at a full parallax light field display. The simulation software uses the display parameters, viewer location and orientation, viewer pupil size and focus location to simulate the image observed by the viewer.
Rie Matsubara +2 more
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Depth of field in light field rendering
Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004This paper focuses on the sampling problem in light field rendering (LFR) that is a fundamental approach to image based rendering. Quality of LFR depends on a light ray database generated from pre-acquired images, since image synthesis is a process of gathering appropriate light ray data from the database.
Keita Takahashi 0001 +2 more
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Lightless Fields: Enhancement and Denoising of Light-Deficient Light Fields
2020Modern focused light field cameras are capable of capturing video at over 160 frames per second, but in so doing sacrifice shutter speed. Outside of laboratory environments, lighting can be problematic resulting in noisy light fields and poor depth reconstruction. To enhance and denoise modern focused light field cameras, we create a unique deep neural
Carson Vogt, Geng Lyu, Kartic Subr
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Journal of Graphics Tools, 2001
Light fields (or Lumigraphs) are an image-based rendering method. As light fields require a large number of images, memory and disk space requirements are a significant barrier to the practical use of light fields. In this paper, we explain how to greatly reduce the space demands of light fields by encoding them in an MPEG format.
Jamo van der Linden, Richard Lobb
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Light fields (or Lumigraphs) are an image-based rendering method. As light fields require a large number of images, memory and disk space requirements are a significant barrier to the practical use of light fields. In this paper, we explain how to greatly reduce the space demands of light fields by encoding them in an MPEG format.
Jamo van der Linden, Richard Lobb
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Light Field Image Quality Assessment via the Light Field Coherence
IEEE Transactions on Image Processing, 2020In this paper, a novel full-reference image quality assessment (IQA) method for evaluating the quality of the distorted light field (LF) image against its reference LF image is proposed, called the log-Gabor feature-based light field coherence (LGF-LFC).
Yu Tian +4 more
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Light-field displays and light-field optics
2016 15th Workshop on Information Optics (WIO), 2016Light-field optics is a novel system in which image is exchangeable in between 2D (light-field data) and real 3D, although this technology is well known just for refocusing ...
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Compressive Light Field Displays
IEEE Computer Graphics and Applications, 2012Light fields are the multiview extension of stereo image pairs: a collection of images showing a 3D scene from slightly different perspectives. Depicting high-resolution light fields usually requires an excessively large display bandwidth; compressive light field displays are enabled by the codesign of optical elements and computational-processing ...
Gordon Wetzstein +4 more
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Computer Graphics Forum, 2012
AbstractWe present a novel approach to recording and computing panorama light fields. In contrast to previous methods that estimate panorama light fields from focal stacks or naive multi‐perspective image stitching, our approach is the first that processes ray entries directly and does not require depth reconstruction or matching of image features ...
Clemens Birklbauer, Oliver Bimber
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AbstractWe present a novel approach to recording and computing panorama light fields. In contrast to previous methods that estimate panorama light fields from focal stacks or naive multi‐perspective image stitching, our approach is the first that processes ray entries directly and does not require depth reconstruction or matching of image features ...
Clemens Birklbauer, Oliver Bimber
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Light field variational estimation using a light field formation model
The Visual Computer, 2018Many light field acquisition methods have been developed thanks to special optical devices, such as microlens array and coded aperture. However, these methods produce light fields with resolutions limited by the employed optical device. In this paper, we propose an alternative method to acquire light fields with resolutions that users can select.
Julien Couillaud, Djemel Ziou
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