Multi-plane, multi-band image projection via broadband diffractive
				optics

Meem, Monjurul; Majumder, Apratim; Menon, Rajesh

doi:10.1364/ao.59.000038

Cited by 16 publications

(10 citation statements)

References 23 publications

(14 reference statements)

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“…where (u, v) represents the motion vector of pixel (x, y) in period t. Equation ( 5) is the optical flow convergence formula. e optical flow field caused by the same moving object should have the characteristics of continuity and smoothness, that is, if the rate of adjacent points in the same object is the same, the optical flow change projected onto the image should also be smooth [8,9]. According to this characteristic, an additional convergence condition added to the optical flow field is designed in this paper:…”

Section: Construction Of Parabolic Trajectorymentioning

confidence: 99%

Parabolic Detection Algorithm of Tennis Serve Based on Video Image Analysis Technology

Tang¹

2021

Security and Communication Networks

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At present, the existing algorithm for detecting the parabola of tennis serves neglects the pre-estimation of the global motion information of tennis balls, which leads to great error and low recognition rate. Therefore, a new algorithm for detecting the parabola of tennis service based on video image analysis is proposed. The global motion information is estimated in advance, and the motion feature of the target is extracted. A tennis appearance model is established by sparse representation, and the data of high-resolution tennis flight appearance model are processed by data fusion technology to track the parabolic trajectory. Based on the analysis of the characteristics of the serve mechanics, according to the nonlinear transformation of the parabolic trajectory state vector, the parabolic trajectory starting point is determined, the parabolic trajectory is obtained, and the detection algorithm of the parabolic service is designed. Experimental results show that compared with the other two algorithms, the algorithm designed in this paper can recognize the trajectory of the parabola at different stages, and the detection accuracy of the parabola is higher in the three-dimensional space of the tennis service.

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Section: Construction Of Parabolic Trajectorymentioning

confidence: 99%

Parabolic Detection Algorithm of Tennis Serve Based on Video Image Analysis Technology

Tang¹

2021

Security and Communication Networks

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“…Furthermore, we also showcased MDLs with a Field of View (FOV) up to 50˚ for wide-angle imaging 26 as well as MDLs with a Depth of Focus (DOF) imaging of up to 6 m in the NIR 34 . Apart from this, MDLs have also been utilized to create broadband holograms enabling multi-plane image projection 35 and in holographic displays for AR/VR applications 36 . Computational imaging with single and multi-aperture MDLs have also been showcased [37][38][39] along with its potential for applications in photovoltaics 40 .…”

Section: Sourangsu Banerji Jacqueline Cooke and Berardi Sensale-rodrigmentioning

confidence: 99%

Impact of fabrication errors and refractive index on multilevel diffractive lens performance

Banerji

Cooke

Sensale‐Rodriguez

2020

Sci Rep

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Multilevel diffractive lenses (MDLs) have emerged as an alternative to both conventional diffractive optical elements (DOEs) and metalenses for applications ranging from imaging to holographic and immersive displays. Recent work has shown that by harnessing structural parametric optimization of DOEs, one can design MDLs to enable multiple functionalities like achromaticity, depth of focus, wide-angle imaging, etc. with great ease in fabrication. Therefore, it becomes critical to understand how fabrication errors still do affect the performance of MDLs and numerically evaluate the trade-off between efficiency and initial parameter selection, right at the onset of designing an MDL, i.e., even before putting it into fabrication. Here, we perform a statistical simulation-based study on MDLs (primarily operating in the THz regime) to analyse the impact of various fabrication imperfections (single and multiple) on the final structure as a function of the number of ring height levels. Furthermore, we also evaluate the performance of these same MDLs with the change in the refractive index of the constitutive material. We use focusing efficiency as the evaluation criterion in our numerical analysis; since it is the most fundamental property that can be used to compare and assess the performance of lenses (and MDLs) in general designed for any application with any specific functionality.

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“…In the above formula, N and M, respectively, represent the dimension rearrangement of the column vectors by the element values of high-and low-resolution feature blocks of film, television, and animation video images, and 1/N and 1/M are the cost between D h and D 1 of balanced formula (9). In order to facilitate subsequent calculation, formula (10) is reconstituted:…”

Section: Image Reconstruction Methods Of Multiframe Animationmentioning

confidence: 99%

“…After determining the triangular meshes on a two-dimensional plane through screen projection, a continuous scaling field shall be assigned to each triangular facet; that is, a scaling factor shall be assigned to each triangular facet, and the scaling factor between adjacent triangular facets shall be continuously variable. e specific process is as follows [9,10]:…”

Section: 2mentioning

confidence: 99%

Animation Design Based on 3D Visual Communication Technology

Shan

Wang

2022

Scientific Programming

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The depth synthesis of image texture is neglected in the current image visual communication technology, which leads to the poor visual effect. Therefore, the design method of film and TV animation based on 3D visual communication technology is proposed. Collect film and television animation videos through 3D visual communication content production, server processing, and client processing. Through stitching, projection mapping, and animation video image frame texture synthesis, 3D vision conveys animation video image projection. In order to ensure the continuous variation of scaling factors between adjacent triangles of animation and video images, the scaling factor field is constructed. Deep learning is used to extract the deep features and to reconstruct the multiframe animated and animated video images based on visual communication. Based on this, the frame feature of video image under gray projection is identified and extracted, and the animation design based on 3D visual communication technology is completed. Experimental results show that the proposed method can enhance the visual transmission of animation video images significantly and can achieve high-precision reconstruction of video images in a short time.

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Multi-plane, multi-band image projection via broadband diffractive optics

Cited by 16 publications

References 23 publications

Parabolic Detection Algorithm of Tennis Serve Based on Video Image Analysis Technology

Parabolic Detection Algorithm of Tennis Serve Based on Video Image Analysis Technology

Impact of fabrication errors and refractive index on multilevel diffractive lens performance

Animation Design Based on 3D Visual Communication Technology

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