Proceedings ArticleDOI
Dappled photography: mask enhanced cameras for heterodyned light fields and coded aperture refocusing
Ashok Veeraraghavan,Ramesh Raskar,Amit Agrawal,Ankit Mohan,Jack Tumblin +4 more
- Vol. 26, Iss: 3, pp 69
TLDR
A novel design to reconstruct the 4D light field from a 2D camera image without any additional refractive elements as required by previous light field cameras is presented.Abstract:
We describe a theoretical framework for reversibly modulating 4D light fields using an attenuating mask in the optical path of a lens based camera. Based on this framework, we present a novel design to reconstruct the 4D light field from a 2D camera image without any additional refractive elements as required by previous light field cameras. The patterned mask attenuates light rays inside the camera instead of bending them, and the attenuation recoverably encodes the rays on the 2D sensor. Our mask-equipped camera focuses just as a traditional camera to capture conventional 2D photos at full sensor resolution, but the raw pixel values also hold a modulated 4D light field. The light field can be recovered by rearranging the tiles of the 2D Fourier transform of sensor values into 4D planes, and computing the inverse Fourier transform. In addition, one can also recover the full resolution image information for the in-focus parts of the scene. We also show how a broadband mask placed at the lens enables us to compute refocused images at full sensor resolution for layered Lambertian scenes. This partial encoding of 4D ray-space data enables editing of image contents by depth, yet does not require computational recovery of the complete 4D light field.read more
Citations
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Journal ArticleDOI
Single image dehazing
TL;DR: Results demonstrate the new method abilities to remove the haze layer as well as provide a reliable transmission estimate which can be used for additional applications such as image refocusing and novel view synthesis.
Journal ArticleDOI
Scene reconstruction from high spatio-angular resolution light fields
TL;DR: This paper proposes an algorithm that leverages coherence in massive light fields by breaking with a number of established practices in image-based reconstruction, and introduces a sparse representation and a propagation scheme for reliable depth estimates which make the algorithm particularly effective for 3D input.
Journal ArticleDOI
The Light Field Camera: Extended Depth of Field, Aliasing, and Superresolution
Tom E. Bishop,Paolo Favaro +1 more
TL;DR: This work addresses traditional multiview stereo methods to the extracted low-resolution views can result in reconstruction errors due to aliasing, and incorporates Lambertian and texture preserving priors to reconstruct both scene depth and its superresolved texture in a variational Bayesian framework.
Journal ArticleDOI
Light Field Image Processing: An Overview
Gaochang Wu,Belen Masia,Adrian Jarabo,Yuchen Zhang,Liangyong Wang,Qionghai Dai,Tianyou Chai,Yebin Liu +7 more
TL;DR: A comprehensive overview and discussion of research in light field image processing, including basic light field representation and theory, acquisition, super-resolution, depth estimation, compression, editing, processing algorithms for light field display, and computer vision applications of light field data are presented.
Journal ArticleDOI
Compressive light field photography using overcomplete dictionaries and optimized projections
TL;DR: A compressive light field camera architecture that allows for higher-resolution light fields to be recovered than previously possible from a single image, and a variety of other applications for light field atoms and sparse coding, including 4D light field compression and denoising are demonstrated.
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