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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 13 — Jun. 18, 2012
  • pp: 14183–14188

Enhancing the pictorial content of digital holograms at 100 frames per second

P.W.M. Tsang, T.-C Poon, and K.W.K. Cheung  »View Author Affiliations

Optics Express, Vol. 20, Issue 13, pp. 14183-14188 (2012)

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We report a low complexity, non-iterative method for enhancing the sharpness, brightness, and contrast of the pictorial content that is recorded in a digital hologram, without the need of re-generating the latter from the original object scene. In our proposed method, the hologram is first back-projected to a 2-D virtual diffraction plane (VDP) which is located at close proximity to the original object points. Next the field distribution on the VDP, which shares similar optical properties as the object scene, is enhanced. Subsequently, the processed VDP is expanded into a full hologram. We demonstrate two types of enhancement: a modified histogram equalization to improve the brightness and contrast, and localized high-boost-filtering (LHBF) to increase the sharpness. Experiment results have demonstrated that our proposed method is capable of enhancing a 2048x2048 hologram at a rate of around 100 frames per second. To the best of our knowledge, this is the first time real-time image enhancement is considered in the context of digital holography.

© 2012 OSA

OCIS Codes
(090.0090) Holography : Holography
(090.1760) Holography : Computer holography
(090.1995) Holography : Digital holography

ToC Category:

Original Manuscript: March 28, 2012
Revised Manuscript: May 16, 2012
Manuscript Accepted: May 16, 2012
Published: June 11, 2012

P.W.M. Tsang, T.-C Poon, and K.W.K. Cheung, "Enhancing the pictorial content of digital holograms at 100 frames per second," Opt. Express 20, 14183-14188 (2012)

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