Improvement of signal-to-noise ratio in digital holography using wavelet transform

The basic problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which reduces the signal-to-noise ratio (SNR). The presence of speckle noise is serious drawback in optical and digital holography since it substantially reduces the SNR in the reconst...

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Veröffentlicht in:	Optics and lasers in engineering 2008, Vol.46 (1), p.42-47
Hauptverfasser:	Sharma, Akshay, Sheoran, Gyanendra, Jaffery, Z.A., Moinuddin
Format:	Artikel
Sprache:	eng
Schlagworte:	Digital holography Exact sciences and technology Fundamental areas of phenomenology (including applications) Image reconstruction tomography Imaging and optical processing Improvement of SNR Optics Physics Speckle and moire patterns Wavelet transform
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Beschreibung
Zusammenfassung:	The basic problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which reduces the signal-to-noise ratio (SNR). The presence of speckle noise is serious drawback in optical and digital holography since it substantially reduces the SNR in the reconstructed image. In this paper, we present wavelet filtering to improve SNR in the reconstructed images from digital holograms. Experimental results are presented.
ISSN:	0143-8166 1873-0302
DOI:	10.1016/j.optlaseng.2007.07.004