Edge Extraction Based on Optical Scanning Holography System with Annular Pupils

Rende, 王仁德 Wang; Yaping, 张亚萍 Zhang; Fan, 王帆 Wang; Xufeng, 祝旭锋 Zhu; Chongguang, 李重光 Li; Yong′an, 张永安 Zhang; Wei, 许蔚 Xu

doi:10.3788/cjl201946.0109001

Cited by 4 publications

(2 citation statements)

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“…x , j = √ −1, and finally, Q = 2πL λ Λ 2 is the Klein-Cook parameter [27]. Equation (2) shows that image processing is along the x -direction. Note that the xdirection and the x -direction is basically the same, given a small Bragg angle typically for AOMs.…”

Section: Principle Of Aom and Acousto-optic Transfer Functionmentioning

confidence: 99%

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Isotropic Two-Dimensional Differentiation Based on Dual Dynamic Volume Holograms

Fan

Zhang

et al. 2023

Photonics

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We study the use of two dynamic thick holograms to realize isotropic two-dimensional (2D) differentiation under Bragg diffraction. Acousto-optic modulators (AOMs) are used as dynamic volume holograms. Using a single volume hologram, we can accomplish a first-order derivative operation, corresponding to selective edge extraction of an image. Since the AOM is a 1D spatial light modulator, filtering of the image only occurs along the direction of the sound propagation. To achieve 2D image processing, two AOMs are used within a Mach–Zehnder interferometer (MZI). By aligning one AOM along the x-direction on the upper arm of the interferometer and another AOM along the y-direction on the lower arm, we accomplish the sum of two first-derivative operations, leading to isotropic edge extraction. We have performed both computer simulations and optical experiments to verify the proposed idea. The system provides additional operations in optical computing using AOMs as dynamic holograms.

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Section: Principle Of Aom and Acousto-optic Transfer Functionmentioning

confidence: 99%

“…The edge information in images usually carries characteristic information about objects. Indeed, edge extraction technology [1][2][3][4] has always been an important research topic in image processing. It has applications such as image enhancement [5], image restoration [6], and image segmentation [7].…”

Section: Introductionmentioning

confidence: 99%

Isotropic Two-Dimensional Differentiation Based on Dual Dynamic Volume Holograms

Fan

Zhang

et al. 2023

Photonics

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Multi-image Multiplexing Pixel Synchronization Encryption based on Optical Scanning Holography

Sun,

Wang

2023

Proceedings of the 8th International Conference on Cyber Security and Information Engineering

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Sectioning with edge extraction in optical incoherent imaging processing

Zhang¹,

Wang²,

Tsang³

et al. 2020

OSA Continuum

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Employing a single-pixel digital holographic recording technique called optical scanning holography (OSH), we accomplish the formidable task of sectioning with edge extraction in three-dimensional (3D) optical incoherent imaging. OSH is a special variant of generalized two-pupil heterodyning image processing, where one of the pupils used is a delta function with the other being a uniform function. In this study, we investigate the use of an annular pupil and a random-phase pupil for edge extraction during sectioning of a 3-D object. Novel simulation results indicate excellent edge extraction of a multi-section object with good sectioning capability, i.e., with each focused edge-extracted section out-of-focused haze has been eliminated.

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Edge Extraction Based on Optical Scanning Holography System with Annular Pupils

Cited by 4 publications

References 0 publications

Isotropic Two-Dimensional Differentiation Based on Dual Dynamic Volume Holograms

Isotropic Two-Dimensional Differentiation Based on Dual Dynamic Volume Holograms

Multi-image Multiplexing Pixel Synchronization Encryption based on Optical Scanning Holography

Sectioning with edge extraction in optical incoherent imaging processing

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