A Method for Eliminating Zero-Order Image in Digital Holograph Based on Contourlet Transform

Abstract:

In the reconstruction process of digital holograph, zero-order image has a bad impact on the quality of real image. In this paper, a new way to eliminate zero-order image in digital holography is proposed. Firstly, digital holography image is decomposed by contourlet transform, then remove the low frequency. The new digital holography image is obtained by inverse contourlet transform. Experiments show that, compared with spatial filtering, frequency domain filtering, laplacian filtering and eliminate zero-order image method based on wavelet, the new method proposed in this paper can eliminate zero-order image better, whats more, the real image is also strengthened in some way.

• Periodical: Advanced Materials Research (Volumes 760-762)
• Pages: 80-83
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.760-762.80
• Online since: September 2013
• Authors: Yu Fei Zhang, Yi Quan Wu
• Keywords: Contourlet Transform, Digital Holograph, Zero-Order Image Eliminating

References

[1] Schnars U, Juptner W. Direct recording of holograms by a CCD target and numerical reconstruction,. Applied Optics, vol. 33, no. 2, pp: 179~181, August (1994).

DOI: 10.1364/ao.33.000179

[2] C J Zheng, P Han, H G Chang. Four-quadrant spatial phase-shifting Fourier transform digital holography for recording of cosine transform coefficients,. Chinese Optical Letter, vol. 4, no. 3, pp: 145~147, March (1994).

[3] Y L Zhu, H Zhou. A pre-process method based on spatial filter for zero-order image elimination in digital off-axis holography,. Laser ＆Infrared，vol. 40 , no. 7 , pp: 795~798, July (2010).

[4] L Wang, S T Feng, S P Nie, etal. Improving the Reconstructed Image Quality of the Digital Holography Through Multiscale Transform,. Journal of Optoelectronics· laser，vol. 18, no. 5, pp: 625~628, June (2007).

[5] C L Zhou, Y L Hang, Z F Zhang. Application of wavelet transform in digital holography, Opto-electronic Engineering, vol. 31, no. 7, pp: 42-45, July (2004).