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Rectangular Multi-Chart Geometry Images [article]

Nathan A. Carr, Jared Hoberock, Keenan Crane, John C. Hart
2006 Symposium on geometry processing : [proceedings]. Symposium on Geometry Processing  
Distortion is comparable to other parameterization schemes, and the rectangular charts yield efficient packing into a texture atlas.  ...  charts while preserving a one-to-one texel correspondence across chart boundaries.  ...  Result images were rendered in NVIDIA's Gelato. Thanks to David Gu and Pedro Sander for providing mesh data, and to Hui Fang and Yizhou Yu for thoughtful advice.  ... 
doi:10.2312/sgp/sgp06/181-190 fatcat:sw6szxtqzveunheva2ni2jkph4

Feature-preserving triangular geometry images for level-of-detail representation of static and skinned meshes

Wei-Wen Feng, Byung-Uck Kim, Yizhou Yu, Liang Peng, John Hart
2010 ACM Transactions on Graphics  
Previous approaches broke the geometry image into multiple rectangular or irregular charts to reduce distortion, but complicated the automatic level of detail one gets from MIP-maps of the geometry image  ...  We introduce triangular-chart geometry images and show this new approach better supports the GPU-side representation and display of skinned dynamic meshes, with support for feature preservation, bounding  ...  Geometry Image Rendering Since the multi-chart mesh geometry datasets generated in our preprocessing stage is in the form of multi-resolution 2D images, they can be easily stored in the GPU video memory  ... 
doi:10.1145/1731047.1731049 fatcat:hdvjjxqkhbd77ogslbvlgmut2i

Perception-motivated multiresolution rendering on sole-cube maps

Bin Sheng, Weiliang Meng, Hanqiu Sun, Wen Wu, Enhua Wu
2013 Multimedia tools and applications  
This paper presents a novel GPU-based multiresolution rendering on solecube maps (SCMs), which is a variant of geometry images built upon spherical parameterization.  ...  Our user study confirmed that the visual quality of the SCMs multiresolution rendering, in comparison with the meshes/geometry images rendering, is also highly efficient especially for complex models in  ...  Furthermore, multi-chart geometry images divide and map the mesh into texture patches in irregular shapes.  ... 
doi:10.1007/s11042-012-1335-2 fatcat:ro7yhrwgwbfxxgl6lmrn4mdlxi

Multi-Chart Geometry Images [article]

P. V. Sander, Z. J. Wood, S. J. Gortler, J. Snyder, H. Hoppe
2003 Symposium on geometry processing : [proceedings]. Symposium on Geometry Processing  
We introduce multi-chart geometry images, a new representation for arbitrary surfaces. It is created by resampling a surface onto a regular 2D grid.  ...  Traditional atlas constructions suffer from discontinuous reconstruction across chart boundaries, which in our context create unacceptable surface cracks.  ...  MCGIM representation A multi-chart geometry image (MCGIM) is a rectangular 2D grid whose entries store 3D points sampled from a given surface.  ... 
doi:10.2312/sgp/sgp03/146-155 fatcat:f57x4exetvexfe6uff5yu3le5i

Compression of Point-Based 3D Models by Shape-Adaptive Wavelet Coding of Multi-Height Fields [article]

Tilo Ochotta, Dietmar Saupe
2004 Symposium Point-Based Graphics : [Proceedings]  
The purpose of the work was to develop multi-chart geometry images, such that surface reconstruction gives the best possible quality with a given memory constraint.  ...  In place of parameterization over a base mesh one can create 'geometry images' over one or several non-intersecting regions in a rectangular domain [13, 39] , or over a sphere [17, 35] , if topology  ... 
doi:10.2312/spbg/spbg04/103-112 fatcat:wrzgkkdmnrb55d2qbguq7fpy5m

Geometry Textures

Rodrigo de Toledo, Bin Wang, Bruno Levy
2007 Computer Graphics and Image Processing (SIBGRAPI), Proceedings of the Brazilian Symposium on  
Tessellated models are converted into geometry textures, a geometric representation for surfaces based on height maps.  ...  The multi-chart geometry images method [9] is similar to our geometry textures method, although it does not use height maps.  ...  It extends Geometry images [4] by splitting a model into multi charts before parameterizing each one onto a square. It is especially different from our method during rendering.  ... 
doi:10.1109/sibgra.2007.4368171 fatcat:t76elzowpzacnoqo7kd4zmma7m

Holographic Capture and Display Systems in Circular Configurations

Tomasz Kozacki, Małgorzata Kujawinska, Grzegorz Finke, Weronika Zaperty, Bryan Hennelly
2012 IEEE/OSA Journal of Display Technology  
This paper presents a novel method of multi-spatial light modulator (SLM) holographic image display that enables wide angle reconstruction of images of real world objects.  ...  In order to support the proper information flow between the multi-sensor capture and multi-SLM display systems we perform analysis using the Wigner distribution function.  ...  The Wigner chart representing the effect of the eye in the reconstructed image plane is found by back propagating the WDF of a rectangular function to the image plane.  ... 
doi:10.1109/jdt.2011.2167955 fatcat:vamtdaq2ovfhpfkjhtgormb6qy

Geometry Textures and Applications†

Rodrigo de Toledo, Bin Wang, Bruno Lévy
2008 Computer graphics forum (Print)  
Visualizing surfaces with geometry textures allows a natural LOD behavior. There are numerous applications that can benefit from the use of geometry textures.  ...  Geometry textures are a novel geometric representation for surfaces based on height maps. The visualization is done through a GPU ray casting algorithm applied to the whole object.  ...  The multi-chart geometry images method [SWG * 03] is similar to our geometry textures method, although it does not use height maps.  ... 
doi:10.1111/j.1467-8659.2008.01185.x fatcat:axttpuldszbnrbpoc6qyqu5aae

Painting detail

Nathan A. Carr, John C. Hart
2004 ACM Transactions on Graphics  
Static Conformal Atlas Dynamic MMA Figure 1 : A static conformal atlas (left) limits the precision of surface painting, whereas a multiresolution meshed atlas (right) dynamically resizes its charts during  ...  Abstract Surface painting is a technique that allows a user to paint a texture directly onto a surface, usually with a texture atlas: a 1:1 mapping between the surface and its texture image.  ...  Thanks also to Jesse Hall, Patrick Lacz, and Mark Flider for their help in preparing the paper, images and video.  ... 
doi:10.1145/1015706.1015809 fatcat:leeeww4p7rbozpxbh43mao4u5q

Painting detail

Nathan A. Carr, John C. Hart
2004 ACM SIGGRAPH 2004 Papers on - SIGGRAPH '04  
Static Conformal Atlas Dynamic MMA Figure 1 : A static conformal atlas (left) limits the precision of surface painting, whereas a multiresolution meshed atlas (right) dynamically resizes its charts during  ...  Abstract Surface painting is a technique that allows a user to paint a texture directly onto a surface, usually with a texture atlas: a 1:1 mapping between the surface and its texture image.  ...  Thanks also to Jesse Hall, Patrick Lacz, and Mark Flider for their help in preparing the paper, images and video.  ... 
doi:10.1145/1186562.1015809 fatcat:vub3uwtpirdhbk7covkoow6pry

ReVision

Manolis Savva, Nicholas Kong, Arti Chhajta, Li Fei-Fei, Maneesh Agrawala, Jeffrey Heer
2011 Proceedings of the 24th annual ACM symposium on User interface software and technology - UIST '11  
Using a corpus of images drawn from the web, ReVision achieves an image classification accuracy of 96% across ten chart categories.  ...  Given a bitmap image of a chart as input, ReVision applies computer vision and machine learning techniques to identify the chart type (e.g., pie chart, bar chart, scatterplot, etc.).  ...  We identify bars by looking for rectangular connected components and then use the bar locations to extract the axes. Bar Charts Find rectangular shapes.  ... 
doi:10.1145/2047196.2047247 dblp:conf/uist/SavvaKCFAH11 fatcat:mynq2hmri5hapavjzmxx2oshee

Automatic detection of microaneurysms in colour fundus images

S. Jiménez, P. Alemany, F. Núñez Benjumea, C. Serrano, B. Acha, I. Fondón, F. Carral, C. Sánchez
2011 Archivos de la Sociedad Española de Oftalmología (English Edition)  
This paper presents an algorithm of automatic colour chart detection and colour patch value extraction.The algorithm can detect different types of colour charts in various images.  ...  The experimental study shows that proposed algorithm successfully found the colour chart in 77.3% of tested images while the X-Rite software in 53.8% of tested images.  ...  On this basis, the methods of projective geometry estimate the coordinates of colour patches. The essence of this method is a multi-stage colour patch detection.  ... 
doi:10.1016/j.oftale.2011.04.009 fatcat:6wscwfdcm5eijgds5xcahnzn6m

Three-dimensional (3D) microstructure visualization and finite element modeling of the mechanical behavior of SiC particle reinforced aluminum composites

N. Chawla, V.V. Ganesh, B. Wunsch
2004 Scripta Materialia  
Imaging and image segmentation 5. Serial section stacking and visualization 6. Finite element modeling Figure 1 shows a flow chart of the serial sectioning process.  ...  Since the geometry of the indenter is known, the amount of material thickness removed can be calculated from the geometry of the indenter.  ... 
doi:10.1016/j.scriptamat.2004.03.043 fatcat:veb743qo6nfslmmvqopaj2mmbi

Optimum Design of Square Air-Core Electromagnetic Coil System

Aye T Ajiboye, Jaye F Opadiji, Joshua O Popoola, Oladimeji Oniyide
2021 FUOYE Journal of Engineering and Technology  
Keywords—Air core, Electromagnetic coil, Magnetic flux density, Multilayer, Multi-turn  ...  Therefore, the equation for the flux density produced by a rectangular loop of wire was adopted in the modelling of SAMMEC with significant wire diameter.  ...  The range of possible wire size for the design specifications and the corresponding value of current was determined from the coil-design chart.  ... 
doi:10.46792/fuoyejet.v6i3.662 fatcat:a2b442tld5catg4murfwwl4qju

Time-oriented Cartographic Treemaps for Visualization of Public Healthcare Data [article]

Chao Tong, Liam McNabb, Robert S. Laramee, Jane Lyons, Angharad Walters, Damon Berridge, Daniel Thayer
2017 Computer Graphics and Visual Computing  
They offer users a space-efficient overview of the complex, multi-variate data coupled with the relative geo-spatial location to enable and facilitate exploration, analysis, and comparison.  ...  Cartographic treemaps offer a way to explore and present hierarchical multi-variate data that combines the space-efficient advantages of treemaps for the display of hierarchical data together with relative  ...  Our algorithm can be considered as a modified space-filling rectangular cartogram with the addition of a hierarchical structure and multi-variate data. Heilman et al.  ... 
doi:10.2312/cgvc.20171273 dblp:conf/tpcg/TongMLLWBT17 fatcat:ugjzro3ainfbvif6vuahi2bh2m
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