We present a new image completion method based on an additional large displacement view (LDV) of the same scene for faithfully repairing large missing regions on the target image in an automatic way. A coarse-to-fine ...
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We present a new image completion method based on an additional large displacement view (LDV) of the same scene for faithfully repairing large missing regions on the target image in an automatic way. A coarse-to-fine distortion correction algorithm is proposed to minimize the perspective distortion in the corresponding parts for the common scene regions on the LDV image. First, under the assumption of a planar scene, the LDV image is warped according to a homography to generate the initial correction result. Second, the residual distortions in the common known scene regions are revealed by means of a mismatch detection mechanism and relaxed by energy optimization of overlap correspondences, with the expectations of color constancy and displacement field smoothness. The fundamental matrix for the two views is then computed based on the reliable correspondence set. Third, under the constraints of epipolar geometry, displacement field smoothness and color consistency of the neighboring pixels, the missing pixels are orderly restored according to a specially defined repairing priority function. We finally eliminate the ghost effect between the repaired region and its surroundings by Poisson image blending. Experimental results demonstrate that our method outperforms recent state-of-the-art image completion methods for repairing large missing area with complex structure information.
By a rapid development of graphics processing unit (GPU), the programmability and highly parallel processing feature of GPU create a chance to allow the general purpose computation to be conducted on GPU, conventional...
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By a rapid development of graphics processing unit (GPU), the programmability and highly parallel processing feature of GPU create a chance to allow the general purpose computation to be conducted on GPU, conventionally called GPGPU (general purpose computation on GPU). A brief survey, in particular on the rationale of how the GPU architecture leads to GPGPU, is introduced in this paper, and various applications by taking advantage of GPGPU computation, including our works in this field on fluid simulation, as well as the works to be presented in this special session are also introduced.
Unicode has become a useful tool for information internationalization, particularly for applications in web links, web pages, and emails. However, many Unicode glyphs look so similar that malicious guys may utilize th...
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Two processor designs are presented that can compute CORDIC rotation and vectoring operations in floating-point representation. In order to achieve the required accuracy, we partition the computation into two phases: ...
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Two processor designs are presented that can compute CORDIC rotation and vectoring operations in floating-point representation. In order to achieve the required accuracy, we partition the computation into two phases: coarse and fine, and look for efficient design approaches to minimize the area cost as well as the latency. The proposed architectures can perform floating-point CORDIC in both vectoring and rotation modes, allowing them to be applied to applications that require high accuracy arithmetic computations with large data ranges, such as 3D graphics acceleration.
The faceting signal, defined in this paper as the difference signal between a rendering of the original geometric model and a simplified version of the geometric model, is responsible for the faceting artifacts common...
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ISBN:
(纸本)9780769530093
The faceting signal, defined in this paper as the difference signal between a rendering of the original geometric model and a simplified version of the geometric model, is responsible for the faceting artifacts commonly observed in the renderings of coarse geometric models. In this paper we analyze the source of the faceting signal and develop a perceptual metric for the visibility of the faceting signal.
The craft of papercutting is part of the folk art traditions of cultures all over the world. From the point of view of computergraphics, papercutting can be seen as a method of composing bi-level images under a set o...
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ISBN:
(纸本)9780769530093
The craft of papercutting is part of the folk art traditions of cultures all over the world. From the point of view of computergraphics, papercutting can be seen as a method of composing bi-level images under a set of geometric connectivity constraints. In this paper, we present a technique for composing digital paper-cut designs. The elements of a design may be images, which are processed via a multilayer thresholding operation, or they may be procedurally-generated arrangements of shapes. Elements are composed using a set of boolean operators that presence connectivity. The resulting designs are well suited to being cut by a new generation of inexpensive computer peripherals.
The proceedings contain 43 papers from the 12th pacific conference on computer graphics and applications, PG 2004. The topics discussed include: a robust method for shape-based 3D model retrieval;classification for fo...
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The proceedings contain 43 papers from the 12th pacific conference on computer graphics and applications, PG 2004. The topics discussed include: a robust method for shape-based 3D model retrieval;classification for fourier volume rendering;controllable single-strip generation for triangulated surfaces;snaking across 3D meshes;pattern oriented remeshing for celtic decoration;modeling hairy plants;a density-based approach for line-drawing simplification;a versatile interactive 3D brush model;colored pencil filter with custom colors;frequency-based environment matting;a progressive refinement approach for image magnification;and accurate minkowski sum approximation of polyhedral models.
We introduce QAS, an efficient quadratic approximation of subdivision surfaces which offers a vend close appearance compared to the true subdivision surface but avoids recursion, providing at least one order of magnit...
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ISBN:
(纸本)9780769530093
We introduce QAS, an efficient quadratic approximation of subdivision surfaces which offers a vend close appearance compared to the true subdivision surface but avoids recursion, providing at least one order of magnitude faster rendering. QAS uses enriched polygons, equipped with edge vertices, and replaces them on-the-fly with low degree polynomials for interpolating positions and normals. By systematically projecting the vertices of the input coarse mesh at their limit position on the subdivision surface, the visual quality of the approximation is good enough for imposing only a single subdivision step, followed by our patch fitting, which allows real-time performances for million polygons output. Additionally, the parametric nature of the approximation offers an efficient adaptive sampling for rendering and displacement mapping. Last, the hexagonal support associated to each coarse triangle is adapted to geometry processors.
Cosmetic makeup is used worldwide as a means to enhance beauty and express moods. An art form in its own right, cosmetic styles continuously change and evolve to reflect cultural and societal trends. While countless m...
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ISBN:
(纸本)9780769530093
Cosmetic makeup is used worldwide as a means to enhance beauty and express moods. An art form in its own right, cosmetic styles continuously change and evolve to reflect cultural and societal trends. While countless magazines and books are dedicated to demonstrating cosmetic art, the actual application of makeup stilt remains a physical endeavor. In this paper, we describe a procedure to apply cosmetic makeup to the image of a person's face with the click of a mouse. Our approach works from before-and-after example images created by professional makeup artists. Using our "cosmetic-transfer" procedure, we can realistically transfer the cosmetic style captured in the example-pair to another person's face. This greatly reduces the time and effort needed to demonstrate a cosmetic style on a new person's face. In addition, our approach can be used to mix-and-match, and even fine-tune, example styles, all virtually, without the need for any physical makeup.
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