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Depth-based refocusing for reducing directional aliasing artifacts

Title
Depth-based refocusing for reducing directional aliasing artifacts
Authors
Lee, EnsunYang, SeoheeHan, MiseonKim, Jeongtae
Ewha Authors
김정태
SCOPUS Author ID
김정태scopus
Issue Date
2016
Journal Title
OPTICS EXPRESS
ISSN
1094-4087JCR Link
Citation
vol. 24, no. 24, pp. 28065 - 28079
Publisher
OPTICAL SOC AMER
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
We investigate a depth-based refocusing method using four-dimensional (4D) light field data, which can reduce directional aliasing artifacts in a refocused image. Unlike conventional filtering-based methods, the proposed method estimates the amount of aliasing artifacts using the disparity information between two neighboring views. It then applies an exact smoothing operation to the refocused image in order to remove the aliasing artifacts. By doing that, the proposed method is able to generate a smoothly blurred image in the out-of-focus region and a sharp image in the focused region. In addition, as the proposed method performs a smoothing operation on the refocused image, it does not create virtual views, which often requires an extremely large amount of computational resources. In both simulation and experiment, the proposed method shows outstanding performance compared to conventional methods.
DOI
10.1364/OE.24.028065
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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