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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22454–22464

Numerical twin image suppression by nonlinear segmentation mask in digital holography

ChoongSang Cho, ByeongHo Choi, Hoonjong Kang, and Sangkeun Lee  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 22454-22464 (2012)

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The in-line holography has obvious advantages especially in wider spatial bandwidth over the off-axis holography. However, a direct current(DC)-noise and an unwanted twin image should be separated or eliminated in the in-line holography for a high quality reconstruction. An approach for suppressing the twin image is proposed by separating the real and twin image regions in the digital holography. Specifically, the initial region of real and twin images is obtained by a blind separation matrix, and the segmentation mask to suppress the twin image is calculated by nonlinear quantization from the segmented image. For the performance evaluation, the proposed method is compared with the existing approaches including the overlapping block variance and manual-based schemes. Experimental results showed that the proposed method has a better performance at the overlapped region of the real and twin images. Additionally, the proposed method causes less loss of real image than the overlapping block variance-based scheme. Therefore, we believe that the proposed scheme can be a useful tool for high quality reconstruction in the in-line holography.

© 2012 OSA

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(090.1995) Holography : Digital holography

ToC Category:
Image Processing

Original Manuscript: July 17, 2012
Revised Manuscript: August 16, 2012
Manuscript Accepted: September 11, 2012
Published: September 17, 2012

ChoongSang Cho, ByeongHo Choi, Hoonjong Kang, and Sangkeun Lee, "Numerical twin image suppression by nonlinear segmentation mask in digital holography," Opt. Express 20, 22454-22464 (2012)

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