Portrait relief generation from 3D Object

Zhang, Yu-Wei; Qin, Beibei; Chen, Yanzhao; Ji, Zhongping; Zhang, Caiming

doi:10.1016/j.gmod.2019.01.002

“…Zhang Yuwei et al proposed a method to reconstruct the underlying 3D shape from a 2.5D bas-relief, and optimized the face shape through normal transfer and Poisson surface reconstruction [ 78 ]. Zhang et al constructed a 2.5D height field for portrait relief to enhance the appearance of the portrait [ 79 ], and the 2.5D technology was applied to the processing of the portrait relief. The technology can also be applied to the surface grinding of a portrait relief.…”

Section: Classification Of Intelligent Grinding Methodsmentioning

confidence: 99%

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Liang

¹

,

Qiao

²

2022

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Although grinding is essential in the production of castings, the casting grinding process in manufacturing is complicated and there are many difficulties, such as the large amount of noise in the grinding environment, non-structural casting entities, and the inclination in the overall shape–time variation. Even in the face of complex technology and a variety of difficulties, modern casting grinding technology still demands large-batch production, low cost, fast response, thin brittleness, high precision, etc. The grinding process has a long history. This paper focus on its development from a human-operated, mechanical job, to an automatic grinding task based on compliant control theory. However, the methods mentioned above can no longer satisfy the current production need. In recent years, researchers have proposed intelligent grinding methods to meet the needs of modern casting production, and provided various strategies and alternatives to the challenges of machining accuracy, machining efficiency, and surface consistency. The research direction of casting polishing has mainly focused on online robot detection, material removal prediction, constant grinding contact force control, and high-precision matching. Although applications for online detection and constant grinding contact force control exist in industry, there are challenges in material removal prediction and three-dimensional high-precision matching. This paper also compares and analyzes the advantages and disadvantages of different grinding methods, and puts forward some research directions for future work, so as to promote more intelligent and efficient grinding of complex castings in practical application.

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“…One category of existing solutions [3], [4], [5], [6] model bas-reliefs through gradient manipulation and Poisson-based surface reconstruction. Another category [7], [8], [9], [10], [11] approximates input surface normal while strictly obeying given depth constraints. Recently, [12] proposed a CNN-based method to generate bas-reliefs.…”

Section: Related Workmentioning

confidence: 99%

High Relief Modeling from 3D Object Through Laplacian-based Surface Deformation

Mathur¹,

Gulati²

2021

CADandA

0

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High relief is a sculpture where more than half of 3D figure is attached onto a background plane. The main problem of high relief modeling from 3D object is how to transform the 3D geometry within limited depth range. This paper presents a novel method to generate high reliefs, which benefits from the technique of Laplacian-based mesh deformation. Given a 3D object as input, we first select a set of handle points on the input model and compute their offset distances to the background. Taking these handle points as constraints, we then optimize the depth field by solving a bi-Laplacian-based linear system. The deformed object is ensured to attach onto the background with preserved depth structure and geometrical details. Our method is effective in dealing with different types of input shapes, even the ones with topology-disconnected components. Experimental results and comparisons with previous method demonstrate the effectiveness of the proposed method.

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“…One category of existing solutions [3], [4], [5], [6] model bas-reliefs through gradient manipulation and Poisson-based surface reconstruction. Another category [7], [8], [9], [10], [11] approximates input surface normal while strictly obeying given depth constraints. Recently, [12] proposed a CNN-based method to generate bas-reliefs.…”

Section: Related Workmentioning

confidence: 99%

Fitting Single Crease Curved-Fold Model to the User Specified Points

Watanabe¹,

Mitani²

2021

CADandA

0

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High relief is a sculpture where more than half of 3D figure is attached onto a background plane. The main problem of high relief modeling from 3D object is how to transform the 3D geometry within limited depth range. This paper presents a novel method to generate high reliefs, which benefits from the technique of Laplacian-based mesh deformation. Given a 3D object as input, we first select a set of handle points on the input model and compute their offset distances to the background. Taking these handle points as constraints, we then optimize the depth field by solving a bi-Laplacian-based linear system. The deformed object is ensured to attach onto the background with preserved depth structure and geometrical details. Our method is effective in dealing with different types of input shapes, even the ones with topology-disconnected components. Experimental results and comparisons with previous method demonstrate the effectiveness of the proposed method.

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Portrait relief generation from 3D Object

Cited by 15 publications

References 15 publications

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

Analysis of Current Situation, Demand and Development Trend of Casting Grinding Technology

High Relief Modeling from 3D Object Through Laplacian-based Surface Deformation

Fitting Single Crease Curved-Fold Model to the User Specified Points

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