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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 15 — May. 20, 2008
  • pp: 2859–2869

Blur-metric-based resolution enhancement of computationally reconstructed integral images

Kwang-Jin Lee, Dong-Choon Hwang, Seung-Cheol Kim, and Eun-Soo Kim  »View Author Affiliations


Applied Optics, Vol. 47, Issue 15, pp. 2859-2869 (2008)
http://dx.doi.org/10.1364/AO.47.002859


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Abstract

A computational integral imaging reconstruction technique can reconstruct a set of plane images of three-dimensional (3-D) objects along the output plane, in which only the plane object image (POI) reconstructed on the right planes where the objects were positioned is highly focused, whereas the other POIs reconstructed away from these planes are unfocused and blurred. In fact, these blurred POIs act as additional noises to other object images reconstructed on different output planes, so that the resolution of reconstructed object images should be considerably deteriorated. In this paper, a novel approach is proposed to effectively reduce the blurred images occurring in the focused POIs by employing a blur metric. From the estimated blur metric of each reconstructed POI, the right output planes where the objects were located can be detected. In addition, with an estimated blur metric, focused POIs can be adaptively eroded by a simple gray level erosion operation because it reduces regional expansion caused by the blur effect. The gray values of the eroded POIs are then finally remapped by referencing the original POIs. Some experiments revealed an average increase of 1.95 dB in the peak signal-to-noise ratio in the remapped POIs compared with that of the originally reconstructed POIs, and that the original forms of the object images in the remapped POIs could be preserved even after they had gone through an erosion operation. This feasibility test of the proposed scheme finally suggests a possibility of its application to robust detection and recognition of 3-D objects in a scene.

© 2008 Optical Society of America

OCIS Codes
(100.6890) Image processing : Three-dimensional image processing
(110.0110) Imaging systems : Imaging systems
(110.6880) Imaging systems : Three-dimensional image acquisition

ToC Category:
Imaging Systems

History
Original Manuscript: November 15, 2007
Revised Manuscript: March 1, 2008
Manuscript Accepted: March 26, 2008
Published: May 15, 2008

Citation
Kwang-Jin Lee, Dong-Choon Hwang, Seung-Cheol Kim, and Eun-Soo Kim, "Blur-metric-based resolution enhancement of computationally reconstructed integral images," Appl. Opt. 47, 2859-2869 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-15-2859


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References

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