Areas Papers

Permanent URI for this collection

https://diglib7.eg.org/handle/10.2312/290

High-Quality Tactile Paintings

[meta data] [files:
001-008.pdf ,
tactile-paintings-line-diagram-and-layered-depth-diagram-of-raffaels-madonna-of-the-meadow-1505-or-1506.jpg ,
tactile-paintings-textured-relief-of-albrecht-durers-the-virgin-mary-and-the-child-dated-1512.jpg ,
tactile-paintings-textured-relief-of-closeup-of-raffaels-madonna-of-the-meadow-1505-or-1506.jpg ,
tactile-paintings-textured-relief-of-jean-fouquets-portrait-of-the-ferrara-court-jester-gonella-around-1445.jpg
]
Reichinger, A.
; 
Maierhofer, S.
; 
Purgathofer, W.

Multispectral Image Matting of Ancient Chinese Paintings

[meta data] [files:
009-015.pdf
]
Zhang, Jiawan
; 
Zhang, Yi
; 
Zhang, Shengping
; 
Yan, Lixia
; 
Chen, Jinyan

Learning How to Match Fresco Fragments

[meta data] [files:
017-024.pdf
]
Funkhouser, T.
; 
Shin, H.
; 
Toler-Franklin, C.
; 
Castañeda, A. García
; 
Brown, B.
; 
Dobkin, D.
; 
Rusinkiewicz, S.
; 
Weyrich, T.

A Streaming Framework for Seamless Detailed Photo Blending on Massive Point Clouds

[meta data] [files:
025-032.pdf
]
Pintus, Ruggero
; 
Gobbetti, Enrico
; 
Callieri, Marco

Using Procedural Modelling as a Framework for Representing Style: An Example from Regency Architecture

[meta data] [files:
041-048.pdf
]
Calogero, Erica
; 
Tyson, Nick
; 
Arnold, David
; 
Morris, David

Relightable Buildings from Images

[meta data] [files:
033-040.pdf ,
area1023final.mov
]
Melendez, F.
; 
Glencross, M.
; 
Ward, G. J.
; 
Hubbold, R. J.

Enhancement of Low Dynamic Range Videos using High Dynamic Range Backgrounds

[meta data] [files:
057-062.pdf
]
Banterle, Francesco
; 
Dellepiane, Matteo
; 
Scopigno, Roberto

Rendering Interior Cultural Heritage Scenes Using Image-based Shooting

[meta data] [files:
049-056.pdf
]
Happa, Jassim
; 
Bashford-Rogers, Tom
; 
Debattista, Kurt
; 
Chalmers, Alan

Photographically Guided Alignment for HDR Images

[meta data] [files:
073-074.pdf
]
Akyüzy, Ahmet Oguz

Avoiding Chromaticity Creep with PseudoGrey

[meta data] [files:
063-070.pdf
]
Grimstead, I. J.
; 
Avis, N. J.

Synthesizing Relative Radiance for Realistic Rendering of Virtual Objects in 3D Photo Collections

[meta data] [files:
071-072.pdf ,
3d_photo_collection.jpg ,
environment_map.jpg ,
image_with_embedded_virtual_object.jpg
]
Kölzer, K.
; 
Nagl, F.
; 
Grimm, P.

Towards Mobile HDR Video

[meta data] [files:
075-076.pdf ,
hdrvideo.m4v
]
Castro, T. K.
; 
Chapiro, A.
; 
Cicconet, M.
; 
Velho, L.

HDR Photographic Pipeline for Camera Modules in Mobile Devices

[meta data] [files:
077-078.pdf
]
Mantiuk, R.
; 
Cybularczyk, J.
; 
Cichowicz, M.
; 
Smyk, M.
; 
Bazyluk, B.

BibTeX (Areas Papers)
@inproceedings{
10.2312:EG2011/areas/001-008,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
High-Quality Tactile Paintings}},

author = {
Reichinger, A.
 and 
Maierhofer, S.
 and 
Purgathofer, W.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/001-008}

}
@inproceedings{
10.2312:EG2011/areas/009-015,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Multispectral Image Matting of Ancient Chinese Paintings}},

author = {
Zhang, Jiawan
 and 
Zhang, Yi
 and 
Zhang, Shengping
 and 
Yan, Lixia
 and 
Chen, Jinyan
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/009-015}

}
@inproceedings{
10.2312:EG2011/areas/017-024,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Learning How to Match Fresco Fragments}},

author = {
Funkhouser, T.
 and 
Shin, H.
 and 
Toler-Franklin, C.
 and 
Castañeda, A. García
 and 
Brown, B.
 and 
Dobkin, D.
 and 
Rusinkiewicz, S.
 and 
Weyrich, T.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/017-024}

}
@inproceedings{
10.2312:EG2011/areas/025-032,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
A Streaming Framework for Seamless Detailed Photo Blending on Massive Point Clouds}},

author = {
Pintus, Ruggero
 and 
Gobbetti, Enrico
 and 
Callieri, Marco
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/025-032}

}
@inproceedings{
10.2312:EG2011/areas/041-048,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Using Procedural Modelling as a Framework for Representing Style: An Example from Regency Architecture}},

author = {
Calogero, Erica
 and 
Tyson, Nick
 and 
Arnold, David
 and 
Morris, David
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/041-048}

}
@inproceedings{
10.2312:EG2011/areas/033-040,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Relightable Buildings from Images}},

author = {
Melendez, F.
 and 
Glencross, M.
 and 
Ward, G. J.
 and 
Hubbold, R. J.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/033-040}

}
@inproceedings{
10.2312:EG2011/areas/057-062,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Enhancement of Low Dynamic Range Videos using High Dynamic Range Backgrounds}},

author = {
Banterle, Francesco
 and 
Dellepiane, Matteo
 and 
Scopigno, Roberto
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/057-062}

}
@inproceedings{
10.2312:EG2011/areas/049-056,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Rendering Interior Cultural Heritage Scenes Using Image-based Shooting}},

author = {
Happa, Jassim
 and 
Bashford-Rogers, Tom
 and 
Debattista, Kurt
 and 
Chalmers, Alan
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/049-056}

}
@inproceedings{
10.2312:EG2011/areas/073-074,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Photographically Guided Alignment for HDR Images}},

author = {
Akyüzy, Ahmet Oguz
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/073-074}

}
@inproceedings{
10.2312:EG2011/areas/063-070,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Avoiding Chromaticity Creep with PseudoGrey}},

author = {
Grimstead, I. J.
 and 
Avis, N. J.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/063-070}

}
@inproceedings{
10.2312:EG2011/areas/071-072,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Synthesizing Relative Radiance for Realistic Rendering of Virtual Objects in 3D Photo Collections}},

author = {
Kölzer, K.
 and 
Nagl, F.
 and 
Grimm, P.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/071-072}

}
@inproceedings{
10.2312:EG2011/areas/075-076,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
Towards Mobile HDR Video}},

author = {
Castro, T. K.
 and 
Chapiro, A.
 and 
Cicconet, M.
 and 
Velho, L.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/075-076}

}
@inproceedings{
10.2312:EG2011/areas/077-078,

booktitle = {
Eurographics 2011 - Areas Papers},

editor = {
A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
},
title = {{
HDR Photographic Pipeline for Camera Modules in Mobile Devices}},

author = {
Mantiuk, R.
 and 
Cybularczyk, J.
 and 
Cichowicz, M.
 and 
Smyk, M.
 and 
Bazyluk, B.
},
year = {
2011},

publisher = {
The Eurographics Association},


ISSN = {1017-4656},

DOI = {
10.2312/EG2011/areas/077-078}

}

Browse

Recent Submissions

Now showing 1 - 13 of 13
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    High-Quality Tactile Paintings
    (The Eurographics Association, 2011) Reichinger, A.; Maierhofer, S.; Purgathofer, W.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    The aim of this work is to bring the cultural heritage of two-dimensional art closer to being accessible by blind and visually impaired people. We present a computer-assisted workflow for the creation of tactile representations of paintings, suitable to be used as a learning tool in the context of guided tours in museums or galleries. Starting from high-resolution images of original paintings, our process allows an artist to quickly design the desired form, and generate data suitable for rapid prototyping machines to produce the physical touch tools. Laser-cut layered depth diagrams, convey not only the individual objects in the painting and their spatial layout, but also augment their depth relations. CNC-milled textured reliefs additionally render fine details like brush strokes and texture suitable for the sense of touch. Our methods mimic aspects of the visual sense, make sure that the haptic output is quite faithful to the original paintings and do not require special manual abilities, like sculpting skills.
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    Multispectral Image Matting of Ancient Chinese Paintings
    (The Eurographics Association, 2011) Zhang, Jiawan; Zhang, Yi; Zhang, Shengping; Yan, Lixia; Chen, Jinyan; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    Digital matting, the process of extracting a foreground object from an image, is an important task in image and video editing. Applying matting techniques to Chinese painting image processing can create novel composites or facilitate other editing tasks. However, Chinese paintings are painted on xuan-paper or silk, the semi-transparent strokes resulted from the diffusion and penetration of ink and pigments make it difficult to extract the foreground from the paintings only based on three-band image. In this paper, we demonstrate a new multispectral image matting technique for Chinese painting image editing. We derive a similarity function from Kubelka-Munk turbid media theory, and this allows us to find the optimal alpha matte. By adopting multispectral matting method, semitransparent foreground stroke can be extracted from the overlay of background strokes. Experimental results show the approach acceptable and promising.
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    Learning How to Match Fresco Fragments
    (The Eurographics Association, 2011) Funkhouser, T.; Shin, H.; Toler-Franklin, C.; Castañeda, A. García; Brown, B.; Dobkin, D.; Rusinkiewicz, S.; Weyrich, T.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    One of the main problems faced during reconstruction of fractured archaeological artifacts is sorting through a large number of candidate matches between fragments to find the relatively few that are correct. Previous computer methods for this task provided scoring functions based on a variety of properties of potential matches, including color and geometric compatibility across fracture surfaces. However, they usually consider only one or at most a few properties at once, and therefore provide match predictions with very low precision. In this paper, we investigate a machine learning approach that computes the probability that a match is correct based on the combination of many features. We explore this machine learning approach for ranking matches in three different sets of fresco fragments, finding that classifiers based on many match properties can be significantly more effective at ranking proposed matches than scores based on any single property alone. Our results suggest that it is possible to train a classifier on match properties in one data set and then use it to rank predicted matches in another data set effectively. We believe that this approach could be helpful in a variety of cultural heritage reconstruction systems.
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    A Streaming Framework for Seamless Detailed Photo Blending on Massive Point Clouds
    (The Eurographics Association, 2011) Pintus, Ruggero; Gobbetti, Enrico; Callieri, Marco; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We present an efficient scalable streaming technique for mapping highly detailed color information on extremely dense point clouds. Our method does not require meshing or extensive processing of the input model, works on a coarsely spatially-reordered point stream and can adaptively refine point cloud geometry on the basis of image content. Seamless multi-band image blending is obtained by using GPU accelerated screen-space operators, which solve point set visibility, compute a per-pixel view-dependent weight and ensure a smooth weighting function over each input image. The proposed approach works independently on each image in a memory coherent manner, and can be easily extended to include further image quality estimators. The effectiveness of the method is demonstrated on a series of massive real-world point datasets.
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    Using Procedural Modelling as a Framework for Representing Style: An Example from Regency Architecture
    (The Eurographics Association, 2011) Calogero, Erica; Tyson, Nick; Arnold, David; Morris, David; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    This paper reports the use of shape grammars, as made available in CityEngine, to deconstruct six examples of Regency facades and uses them to form a reconstruction of Brunswick Square, in Brighton & Hove, UK. The aim of the research is to evaluate the potential for shape grammar rules to effectively encapsulate aspects of style in a formal, computational language. It is argued that such a system could both result in a stochastically based definition of Regency style with a measurable degree of certainty and enable the presentation of historical periods of history in a real-time virtual environment.
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    Relightable Buildings from Images
    (The Eurographics Association, 2011) Melendez, F.; Glencross, M.; Ward, G. J.; Hubbold, R. J.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We propose a complete image-based process that facilitates recovery of both gross-scale geometry and local surface structure to create highly detailed 3D models of building façades from photographs. We approximate both albedo and sufficient local geometric structure to compute complex self-shadowing effects, and fuse this with a gross-scale 3D model. Our approach yields a perceptually high-quality model, imparting the illusion of measured reflectance. The requirements of our approach are that image capture must be performed under diffuse lighting and surfaces in the images must be predominantly Lambertian. Exemplars of materials are obtained through surface depth hallucination, and our novel method matches these with multi-view image sequences that are also used to automatically recover 3D geometry. In this paper we illustrate the effictiveness of our approach through visually realistic reconstructions of historic buildings in two test cases, together with a table showing the breakdown of effort required to reconstruct each.
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    Enhancement of Low Dynamic Range Videos using High Dynamic Range Backgrounds
    (The Eurographics Association, 2011) Banterle, Francesco; Dellepiane, Matteo; Scopigno, Roberto; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    In this paper, we present a practical system for enhancing the quality of Low Dynamic Range (LDR) videos using High Dynamic Range (HDR) background images. Our technique relies on the assumption that the HDR information is static in the video footage. This assumption can be valid in many scenarios where moving subjects are the main focus of the footage and do not have to interact with moving light sources or highly reflective objects. Another valid scenario is teleconferencing via webcams, where the background is typically over-exposed, not allowing the users to perceive correctly the environment where the communication is happening.
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    Rendering Interior Cultural Heritage Scenes Using Image-based Shooting
    (The Eurographics Association, 2011) Happa, Jassim; Bashford-Rogers, Tom; Debattista, Kurt; Chalmers, Alan; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    Rendering interior cultural heritage scenes using physically based rendering with outdoor environment maps is computationally expensive using ray tracing methods, and currently difficult for interactive applications without significant precomputation of lighting. In this paper, we present a novel approach to relight synthetic interior scenes by extending image-based lighting to generate fast high-quality interactive previews of these environments. Interior light probes are acquired from a real scene, then used to shoot light onto the virtual scene geometry to accelerate image synthesis by assuming the light sources shot act as the correct solution of light transport for that particular intersection point. We term this approach Image-Based Shooting. It is demonstrated in this paper with an approach inspired by Irradiance Cache Splatting. The methodology is well-suited for interior scenes in which light enters through narrow windows and doors, common at cultural heritage sites. Our implementation generates high-quality interactive preview renditions of these sites and can significantly aid documentation, 3D model validation and predictive rendering. The method can easily be integrated with existing cultural heritage reconstruction pipelines, especially ray tracing based renderers.
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    Photographically Guided Alignment for HDR Images
    (The Eurographics Association, 2011) Akyüzy, Ahmet Oguz; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    This paper presents an automatic image alignment algorithm that alleviates the need to keep the camera still during the capture of a bracketed sequence to obtain an HDR image. Our algorithm assumes that the misalignment between the two consecutive exposures is translational. Using a photographically guided random search, our algorithm first finds properly exposed high contrast regions. The shift amount is then found by analyzing and matching the pixel correlations inside these regions.
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    Avoiding Chromaticity Creep with PseudoGrey
    (The Eurographics Association, 2011) Grimstead, I. J.; Avis, N. J.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We examine the calibration of Commodity, Off-The-Shelf (COTS) monitors to the DICOM GreyScale Display Function (GSDF) standard (as used for medical imaging). We note that uncalibrated and calibrated (using commercial and non-commercial tools) monitors exhibit Chromaticity creep along the black body locus in CIE 1931 colourspace; this is at odds with high-end medical monitors which do not introduce colour-but cost significantly more than COTS colour monitors. Alternative algorithms are investigated to produce a DICOM GSDF compliant calibration, where we take into account both luminance and chromaticity. Using PseudoGrey we generate thousands of shades of grey on a colour monitor to produce a high dynamic range, albeit in greyscale, improving on the standard 256 shades of grey. In this work, we now restrict our introduction of colour to minimise chromaticity deviation from a given white point. We have found various chromatic anomalies with COTS monitors, and discuss our findings along with algorithmic variations to cope with such issues. We believe this work contributes to the availability of a robust method to calibrate COTS colour monitors to the GSDF and hence any required intensity curve whilst retaining a pure colour, enabling greyscale images with over 256 shades to be accurately displayed. This may have significant cost, and potentially improved diagnostic implications, in the reporting of medical radiological images, and could be used to display high dynamic range greyscale imagery (such as multiple exposure black and white photography).
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    Synthesizing Relative Radiance for Realistic Rendering of Virtual Objects in 3D Photo Collections
    (The Eurographics Association, 2011) Kölzer, K.; Nagl, F.; Grimm, P.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We present a novel approach for accurate reconstruction of relative radiance of every surface in an augmented image-based 3D scene. By using unordered images with varying exposure of 3D Photo Collections and a 3D mesh of the scene geometry, the relative radiance of all surfaces in the scene is reconstructed with High Dynamic Range. This is performed by subdividing the surfaces of the scene into patches and calculating the HDR image estimate for each patch. The result is used to embed virtual objects into 3D Photo Collections with authentic lighting.
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    Towards Mobile HDR Video
    (The Eurographics Association, 2011) Castro, T. K.; Chapiro, A.; Cicconet, M.; Velho, L.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We present a novel method for High Dynamic Range video where the critical phases of the pipeline are based on histograms. It is possible to achieve high framerates, since the algorithm generates one HDR frame per captured frame. Also, the method is of low computational cost, making it particularly suited for devices with less powerful processors. An implementation of the capture process for the Nokia N900 smartphone, using the recent FCam API, is detailed.
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    HDR Photographic Pipeline for Camera Modules in Mobile Devices
    (The Eurographics Association, 2011) Mantiuk, R.; Cybularczyk, J.; Cichowicz, M.; Smyk, M.; Bazyluk, B.; A. Day and R. Mantiuk and E. Reinhard and R. Scopigno
    We replace the standard image capture pipeline in mobile phones with an HDR acquisition pipeline based on the multi-exposure method. We report timings for basic HDR algorithms implemented in a smartphone with ARMv6 processor and discuss programming techniques that speed-up execution and reduce RAM memory usage. The results compare favourably to proprietary iPhone 4 HDR implementation and show that the HDR pipeline can be efficiently implemented on existing camera phones using high-level APIs and no dedicated hardware.