Removal of line artifacts on mesh boundary in computer generated hologram by mesh phase matching

Park, Jae‐Hyeung; Yeom, Han-Ju; Kim, Hee-Jae; Zhang, Huijun; Li, BoNi; Ji, Yeong-Min; Kim, Sang-Hoo

doi:10.1364/oe.23.008006

Cited by 16 publications

(5 citation statements)

References 14 publications

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“…Based on the above theory, we simulated a color textured curved surface consisting of polygons [10]. The polygon model of the curved surface consists of 24 polygon facets and is shown in Fig.…”

Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

“…Figure 3(b) presents the resulting numerical simulation result, wherein some line defects are apparent at the bordering lines between neighboring polygon facets. It is well known that when the angular spectrum of the phase-matched triangle polygon is calculated by the analytic method [10,13], line defects can be removed effectively. The advanced analytic formula for arbitrarily textured triangular facets has not been developed and remains a challenging problem.…”

Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

“…The angular spectrum branches of the edges of the left triangle, 1 L , 2 L , and 3 L are denoted by 1 A , 2 A , and 3 A , respectively, while in Step2 those of the right triangle, 4 L , 5 L , and 6 L , are denoted by 4 A , 5 A , and 6 A . In the analytic method, the angular spectrums of the shared edges are exactly removed in Step1 + Step2 which is mathematically expressed by 4 0, A A + = (10) meaning that the two shared edges represented by 2 L and 4 L precisely cancels each other out and the line artifact does not develop, as was proven in previous research [10,13]. However, in the FFT calculation, the angular spectrums of the shared edges do not precisely cancel each other out because of the considerable numerical errors induced by the discrete approximation of FFT, which causes the non-zero line artifact at the border of the two adjacent polygons.…”

Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

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Wave optic modeling of semi-transparent textured curved surfaces

2018

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Lightwave propagation through a multilayer structure of patterned semitransparent curved surfaces is a fundamental issue for various display applications from practical industrial problems such as moiré pattern strain in touch panel displays to fundamental research issues in layered tensor displays and layered complex modulation holographic displays. In this paper, a wave optic modeling of multiple layers of patterned semi-transparent curved surfaces is presented. The proposed wave optic modeling is based on the algorithmic framework used in the field of polygon computer-generated holograms, a framework which can additionally devise the characteristic transmittance function of textured curved surfaces. To present an industrial application, the proposed modeling method is used to numerically simulate the visual perception of the moiré patterns observed in the layered structures of transparent phase-only patterned curved surfaces and their diverse variations with a change in observation angle.

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Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

Section: Wave Optic Modeling Of Optical Curved Surfaces Represented Bmentioning

confidence: 99%

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Wave optic modeling of semi-transparent textured curved surfaces

2018

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“…In order to add lighting information, researchers have proposed various solutions. Park et al [9] introduced a method for smooth shading, successfully adding illumination information with lower computational time. However, it solely involves diffuse reflection and does not cover the rendering of specular reflection, thereby diminishing the scene's realism.…”

Section: Introductionmentioning

confidence: 99%

Calculation of polygon-based holograms for textured surfaces using orthogonal projection

Wu,

Hao,

Kang

2024

Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024)

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In the current landscape of technological advancements, holography is acknowledged as one of the most promising threedimensional display technologies. To enhance the quality of holographic reproductions and address the issue of texture mapping distortion, this paper proposes an innovative method based on orthogonal texture mapping for generating threedimensional model-computed holograms. This approach leverages the analytical polygonal element method, incorporates the Blinn-Phong reflection model to acquire lighting information, and employs orthogonal projection for obtaining texture information. The result is the generation of high-quality three-dimensional object-computed holograms. Numerical simulation experiments demonstrate that the holographic reconstructions generated by our method exhibit undistorted and non-distorted textures on the surface, presenting superior visual quality. This method holds significant theoretical and practical value.

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“…Subsequently, many improved methods on wave-field rendering [31][32][33], texture [10,34,35], shading [36], and hidden-surface removal have been described [37][38][39]. The removal of dark line artifacts on the mesh boundary [40] and occlusion handling between polygon surfaces provide correct information about the perception of depth in order to encode 3D scenes [41][42][43]. Also the calculation of reflectance distributions has been addressed in polygon-based methods [44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Polygon-based computer-generated holography: a review of fundamentals and recent progress [Invited]

et al. 2022

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In this review paper, we first provide comprehensive tutorials on two classical methods of polygon-based computergenerated holography: the traditional method (also called the fast-Fourier-transform-based method) and the analytical method. Indeed, other modern polygon-based methods build on the idea of the two methods. We will then present some selective methods with recent developments and progress and compare their computational reconstructions in terms of calculation speed and image quality, among other things. Finally, we discuss and propose a fast analytical method called the fast 3D affine transformation method, and based on the method, we present a numerical reconstruction of a computer-generated hologram (CGH) of a 3D surface consisting of 49,272 processed polygons of the face of a real person without the use of graphic processing units; to the best of our knowledge, this represents a state-of-the-art numerical result in polygon-based computed-generated holography. Finally, we also show optical reconstructions of such a CGH and another CGH of the Stanford bunny of 59,996 polygons with 31,724 processed polygons after back-face culling. We hope that this paper will bring out some of the essence of polygon-based computer-generated holography and provide some insights for future research.

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Removal of line artifacts on mesh boundary in computer generated hologram by mesh phase matching

Cited by 16 publications

References 14 publications

Wave optic modeling of semi-transparent textured curved surfaces

Wave optic modeling of semi-transparent textured curved surfaces

Calculation of polygon-based holograms for textured surfaces using orthogonal projection

Polygon-based computer-generated holography: a review of fundamentals and recent progress [Invited]

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