Singular value decomposition approach to coherent averaging in digital holography

Park, Samuel D.; Thurman, Samuel T.; Lindle, J. R.; Watnik, Abbie T.; Lebow, Paul S.; Bratcher, Andrew

doi:10.1364/josaa.392645

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…Optical scanning holography (OSH) has been used to perform edge enhancement through manipulation of system pupil functions [5]. Image processing techniques with DH include sharpness maximization utilizing phase screens in the propagation volume, as well as an image sharpening metric for quantitative analysis [6][7][8]. Other uses for DH include coherent averaging techniques for improvements in reconstructed image quality, imaging through deep atmospheric turbulence [9][10][11][12] and aero-optics [13,14].…”

Section: Introductionmentioning

confidence: 99%

Optical image processing of 2-D and 3-D objects using digital holography

Smith¹,

Banerjee²

2023

Practical Holography XXXVII: Displays, Materials, and Applications

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Traditional computer vision (CV) approaches are the norm when attempting to extract edge information from an imaged object. These discrete approaches are almost always performed on 2D intensity imagery and at times can be computationally expensive depending on the algorithm. Digital holography (DH) provides access to the 3D object information. By manipulation of the Fourier transform of the hologram, which is also needed for isolating the real or virtual image in off-axis DH, edge information can be extracted by high pass spatial filtering of the pertinent cropped and centered spectrum. We show simple simulations utilizing 2-D and 3-D objects to show edge enhancement qualities using this approach, and compare its performance to conventional CV techniques. The same technique can be used to perform other image processing functions, such as image sharpening, blurring, and others so long as the correct filters are applied. Developments in ultra-high definition displays have either incorporated DH or have overlapping areas of interest currently, including 3-D television and augmented reality.

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Section: Introductionmentioning

confidence: 99%

Optical image processing of 2-D and 3-D objects using digital holography

Smith¹,

Banerjee²

2023

Practical Holography XXXVII: Displays, Materials, and Applications

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A Study of Resolution Improvement in Noncoherent Optical Coherence Imaging

Yang

et al. 2022

Advances in Mathematical Physics

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Noncoherent light, as a common light source in life, can effectively avoid problems such as scattering noise caused by optical components incoherent light imaging, and through the design of the optical path can also trigger interference and holographic imaging of objects, allowing holography to be used in more fields. Various techniques have emerged for recording holograms using incoherent light sources as technology has developed. A recording method has been proposed that exploits the correlation between the object wave information and the Fresnel band sheet to achieve incoherent hologram recording. Using a spatial light modulator (SLM) loaded with a bit-phase mask with multiplexed lens function, the incident light wavefield is phase-modulated to achieve diffraction spectroscopy and phase shifting. And holograms with different phase shifts can be obtained and combined with phase-shifting techniques to eliminate the effects of twin images caused by coaxial holography in the reproduction process. Based on the study of this incoherent holographic imaging system, the influence of the characteristics of the main components of the system and the corresponding parameters on the resolution of the recorded and reproduced holograms is investigated, and optimization methods are given from both theoretical and experimental studies. The empirical analysis of the FINCH imaging system is carried out. The observed optical path is designed, and the method of making a bit-phase mask loaded on a spatial light modulator is presented. The effect of the focal length and recording distance of the dislocation mask on the resolution of the system is investigated by both computer simulation and experimental operation.

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Singular value decomposition approach to coherent averaging in digital holography

Cited by 2 publications

References 22 publications

Optical image processing of 2-D and 3-D objects using digital holography

Optical image processing of 2-D and 3-D objects using digital holography

A Study of Resolution Improvement in Noncoherent Optical Coherence Imaging

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