Issue 1

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/94

Editorial

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Coquillart, Sabine
; 
Duke, David

An Advanced Color Representation for Lossy Compression of CMYK Prepress Images

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De Neve, P.
; 
Denecker, K.
; 
Philips, W.
; 
Lemahieu, I.

Efficient Glossy Global Illumination with Interactive Viewing

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Stamminger, Marc
; 
Scheel, Annette
; 
Granier, Xavier
; 
Perez-Cazorla, Frederic
; 
Drettakis, George
; 
Sillion, Francois

Texture-based Dither Matrices

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Veryovka, Oleg
; 
Buchanan, John

Observational Models of Graphite Pencil Materials

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Sousa, Mario Costa
; 
Buchanan, John W.

Geometrically-Aware Interactive Object Manipulation

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Choi, Min-Hyung
; 
Cremer, James F.

Event Reports

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Book Reviews

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Eurographics

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BibTeX (Issue 1)
                
@article{
10.1111:1467-8659.00383,

journal = {Computer Graphics Forum},
title = {{
Editorial}},

author = {
Coquillart, Sabine
 and 
Duke, David
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00383}

}
                
@article{
10.1111:1467-8659.00384,

journal = {Computer Graphics Forum},
title = {{
An Advanced Color Representation for Lossy Compression of CMYK Prepress Images}},

author = {
De Neve, P.
 and 
Denecker, K.
 and 
Philips, W.
 and 
Lemahieu, I.
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00384}

}
                
@article{
10.1111:1467-8659.00385,

journal = {Computer Graphics Forum},
title = {{
Efficient Glossy Global Illumination with Interactive Viewing}},

author = {
Stamminger, Marc
 and 
Scheel, Annette
 and 
Granier, Xavier
 and 
Perez-Cazorla, Frederic
 and 
Drettakis, George
 and 
Sillion, Francois
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00385}

}
                
@article{
10.1111:1467-8659.00387,

journal = {Computer Graphics Forum},
title = {{
Texture-based Dither Matrices}},

author = {
Veryovka, Oleg
 and 
Buchanan, John
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00387}

}
                
@article{
10.1111:1467-8659.00386,

journal = {Computer Graphics Forum},
title = {{
Observational Models of Graphite Pencil Materials}},

author = {
Sousa, Mario Costa
 and 
Buchanan, John W.
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00386}

}
                
@article{
10.1111:1467-8659.00388,

journal = {Computer Graphics Forum},
title = {{
Geometrically-Aware Interactive Object Manipulation}},

author = {
Choi, Min-Hyung
 and 
Cremer, James F.
},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00388}

}
                
@article{
10.1111:1467-8659.00390,

journal = {Computer Graphics Forum},
title = {{
Event Reports}},

author = {},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00390}

}
                
@article{
10.1111:1467-8659.00389,

journal = {Computer Graphics Forum},
title = {{
Book Reviews}},

author = {},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00389}

}
                
@article{
10.1111:1467-8659.00391,

journal = {Computer Graphics Forum},
title = {{
Eurographics}},

author = {},
year = {
2000},

publisher = {
Blackwell Publishers Ltd and the Eurographics Association},


ISSN = {1467-8659},

DOI = {
10.1111/1467-8659.00391}

}

Browse

Recent Submissions

Now showing 1 - 9 of 9
  • No Thumbnail Available
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    Editorial
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) Coquillart, Sabine; Duke, David
  • No Thumbnail Available
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    An Advanced Color Representation for Lossy Compression of CMYK Prepress Images
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) De Neve, P.; Denecker, K.; Philips, W.; Lemahieu, I.
    CMYK color images are used extensively in prepress applications. When compressing those color images one has to deal with four different color channels. Usually compression algorithms only take into account the spatial redundancy that is present in the image data. This approach does not yield an optimal data reduction since there also exists a high correlation between the different colors in natural images.This paper shows that a significant gain in data reduction can be achieved by exploiting this color redundancy. Some popular transform coders, including DCT-based JPEG and the SPIHT wavelet coder, were used for reducing the spatial redundancy. The performance of the algorithms was evaluated using a quality criterion based on human perception like the mean CIEL*a*b*?E error.
  • No Thumbnail Available
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    Efficient Glossy Global Illumination with Interactive Viewing
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) Stamminger, Marc; Scheel, Annette; Granier, Xavier; Perez-Cazorla, Frederic; Drettakis, George; Sillion, Francois
    The ability to perform interactive walkthroughs of global illumination solutions including glossy effects is a challenging open problem. In this paper we overcome certain limitations of previous approaches. We first introduce a novel, memory- and compute-efficient representation of incoming illumination, in the context of a hierarchical radiance clustering algorithm. We then represent outgoing radiance with an adaptive hierarchical basis, in a manner suitable for interactive display. Using appropriate refinement and display strategies, we achieve walkthroughs of glossy solutions at interactive rates for non-trivial scenes. In addition, our implementation has been developed to be portable and easily adaptable as an extension to existing, diffuse-only, hierarchical radiosity systems. We present results of the implementation of glossy global illumination in two independent global illumination systems.
  • No Thumbnail Available
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    Texture-based Dither Matrices
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) Veryovka, Oleg; Buchanan, John
    Continuous tone images must be halftoned to be displayed on binary output devices such as printers. Halftoning algorithms at low resolutions of the output hardware introduce textures into the resulting display. In this work we control halftoning texture by generating a threshold matrix from an image-based texture. We demonstrate that processing textures by the adaptive histogram equalization algorithm approximates pixel distribution properties of traditional dither screens. Ordered dithering with the resulting threshold matrix enables us to define texture in the halftoned image. We control the appearance of this texture by a combination of the ordered dither algorithm with an error diffusion process. We present applications of texture-based dither screens to both photorealistic and artistic rendering. In the case of photorealistic tone reproduction our technique preserves textures and edges of the original image. The ability to define an arbitrary texture enables us to introduce a variety of artistic effects, including embossing of images with textures and text, and approximation of the appearance of of conventional illustration media. We evaluate the resulting halftoning using multi-scale edge distortion measures. Our quantitative evaluation closely corresponds to the visual observations.
  • No Thumbnail Available
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    Observational Models of Graphite Pencil Materials
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) Sousa, Mario Costa; Buchanan, John W.
    This paper presents models for graphite pencil, drawing paper, blenders, and kneaded eraser that produce realistic looking pencil marks, textures, and tones. Our models are based on an observation of how lead pencils interact with drawing paper, and on the absorptive and dispersive properties of blenders and erasers interacting with lead material deposited over drawing paper. The models consider parameters such as the particle composition of the lead, the texture of the paper, the position and shape of the pencil materials, and the pressure applied to them. We demonstrate the capabilities of our approach with a variety of images and compare them to digitized pencil drawings. We also present image-based rendering results implementing traditional graphite pencil tone rendering methods.
  • No Thumbnail Available
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    Geometrically-Aware Interactive Object Manipulation
    (Blackwell Publishers Ltd and the Eurographics Association, 2000) Choi, Min-Hyung; Cremer, James F.
    This paper describes formulation and management of constraints, and a nonlinear optimization algorithm that together enable interactive geometrically aware manipulation of articulated objects. Going beyond purely kinematic or dynamic approaches, our solution method directly employs geometric constraints to ensure non-interpenetration during object manipulation. We present the formulation of the inequality constraints used to ensure nonpenetration, describe how to manage the set of active inequality constraints as objects move, and show how these results are combined with a nonlinear optimization algorithm to achieve interactive geometrically aware object manipulation. Our optimization algorithm handles equality and inequality constraints and does not restrict object topology. It is an efficient iterative algorithm, quadratically convergent, with each iteration bounded by O(nnz(L)), where nnz(L) is the number of non-zeros in L, a Cholesky factor of a sparse matrix.
  • No Thumbnail Available
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    Event Reports
    (Blackwell Publishers Ltd and the Eurographics Association, 2000)
    1999 Siggraph / Eurographics Workshop on Graphics HardwareGVE '99: 1999 Eurographics/ SIGGRAPH Workshop on Graphics and Visualization5th Eurographics Workshop on Multimedia
  • No Thumbnail Available
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    Book Reviews
    (Blackwell Publishers Ltd and the Eurographics Association, 2000)
    Books reviewed:Salomon, David. Computer Graphics and Geometric ModelingGovil-Pai, Shalini and Pai, Rajesh. Learning Computer GraphicsRoelofs, Greg. PNG: The Definitive GuideMarsh, Duncan. Applied Geometry for Computer Graphics and CADMarchand, Patrick. Graphics and GUIs with MATLAB (2nd edition)Ammerall, Leen. Computer Graphics for Java Programmers
  • No Thumbnail Available
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    Eurographics
    (Blackwell Publishers Ltd and the Eurographics Association, 2000)