Cumincad : CUMINCAD Papers : Search Results

CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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Reformat results as: short short into frame detailed detailed into frame

_id	c5bc
authors	Popova, Mina
year	1998
title	Model of Design Parts and its Use to the Design Team
doi	https://doi.org/10.52842/conf.caadria.1998.233
source	CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 233-242
summary	This paper discusses the impact of the choice of representation on the final result in design and construction projects. Representation is an integrated part of the design process used by architects as a communication tool to help them present a concept to their clients and other consultants. The representation choice, in addition, reflects the professional’s perception of the design process and the architectural artefact. Architects’ offices work with a wide range of problems - aesthetic and spatial issues, detailing, choice of materials, and systems design. The multiplicity of representations enriches the understanding of these issues. Today, the model-oriented approach in design is common among both architects and leading software producers for the construction industry. While STEP (Standard for the Exchange of Product Data) aims at developing very comprehensive product models, we examine the possibility of building up a small-scale model responding to the information needs of a design team. In our research work, we view a model of design parts as a suitable carrier of information allowing the designers to store data reflecting their accumulated and refined professional knowledge and experience. Besides, the team of architects can later easily retrieve information needed for future design reuse from the model. To reuse design solutions and learn from previous work is an essential part of the professional culture. The construction industry as a whole has been slow in implementing information technology to improve the work methods. Neither have architects’ offices used the full potential of this technology to structure information and rationalize the design process. The objective of this study is to examine whether information technology makes it possible to organize all the design information in an office archive. The proposed model of design parts relates to national standards and universal models for product data representation and exchange, such as STEP. Today, the construction sector is becoming increasingly aware of the potential of the model-oriented approach both to rationalize the design and construction process and offer designers new options to store, broaden and reuse professional knowledge. We have used the information modelling language EXPRESS to describe our concept.
keywords	Design and Construction Process, Model-oriented Approach, Representation, Information Technology, STEP
series	CAADRIA
email
more	http://www.caadria.org
last changed	2022/06/07 08:00

_id	6b1d
authors	Porada, Mikhael
year	1994
title	Architectural Briefing Data Representation and Sketch Simulation Computer Environment
doi	https://doi.org/10.52842/conf.ecaade.1994.055
source	The Virtual Studio [Proceedings of the 12th European Conference on Education in Computer Aided Architectural Design / ISBN 0-9523687-0-6] Glasgow (Scotland) 7-10 September 1994, pp. 55-59
summary	Reflection about the architectural programme starts with the analysis of its writing, its "style" which bears not only the "griffe" of the programmer but as well the structure, methodology, codes of reading, etc. particular to a programming approach. The programme structure corresponds in most cases to the different levels in the text's format and the composition modes of representing data and their relations. The choice made can either facilitate or impede the reading as interpretation of the programme. The programmer’s aim should be to open the text to reading towards a "synthetic schematic" summary, a sort of cognitive threshold which allows the reader to understand both the client's objectives and the designer's intentions enhanced by his experience. Articulating a designer's experience means focusing on his knowhow and memory. The designer's recollected knowledge and heuristic approaches to the solution of a basic design problem - types, his readings and spatial evaluations permanently feed the knowhow. It is important for the architect to have access to past examples, to the collective memory of his workplace, and a repertoire of readings, notes, sketches, influences and citations. It is therfore equally important that a computer environment also have a multimodal "architect's memory" or "project memory" module in which different forms of representation are classified, and made accessible as memory components. It is also necessary to have the possibility to access at any moment in an interactive manner to the recomposition, addition and adaptation of these mnemonic components. The information coming from the programme, classified as descriptive, prescriptive and quantitative types of data, must be able to be interrogated in different modes of representation : text, matrices, nets, diagrams, and so on, so that the pertinent information can be extraded at any given design process stage. Analysis of competition programmes show that often the description of an activity, for example, the Great Stadium competition in Paris, is described by several pages of text, a circulation diagram with arrows and legend, a topological proximity diagram with legend and as table activity - areas . These different representations, which are supposed to be complementary and give the most pertinent view of the client needs, show in fact after analysis, many description problems, incoherance, and which result in a reading difficulty.
series	eCAADe
last changed	2022/06/07 08:00

_id	sigradi2023_161
id	sigradi2023_161
authors	Portillo, Juan Pablo and Flores, Luis
year	2023
title	Heritage parametric modeling
source	García Amen, F, Goni Fitipaldo, A L and Armagno Gentile, Á (eds.), Accelerated Landscapes - Proceedings of the XXVII International Conference of the Ibero-American Society of Digital Graphics (SIGraDi 2023), Punta del Este, Maldonado, Uruguay, 29 November - 1 December 2023, pp. 277–288
summary	The study focuses on the digital documentation and geometric modeling of the Susana Soca Chapel, an architectural masterpiece designed by Antonio Bonet in Uruguay. The chapel is known for its unique geometric form composed of equilateral triangles, and it holds significant historical and cultural value. The research utilizes advanced digital technologies such as laser scanning and photogrammetry to capture the three-dimensional data of the chapel. The model is then analyzed to establish compositional rules and generate a new model using Dynamo Revit and parametric design techniques. The results include a high-quality point cloud model, facilitating the exploration of generative design principles. The discussion highlights the use of non-explicit modeling tools in architecture, emphasizing the need to understand the underlying geometric principles that govern the creation of complex spatial compositions. The research aims to establish guidelines and protocols for the digital documentation and algorithmic design of architectural landmarks, presenting a challenging yet promising proposition in the field.
keywords	Digital heritage, Dynamo, Point cloud, Parametric design, 3D scanning
series	SIGraDi
email
last changed	2024/03/08 14:06

_id	sigradi2015_6.387
id	sigradi2015_6.387
authors	Pramanik, Adetania; Haymaker, John; Swarts, Matthew; Zimring, Craig
year	2015
title	Integrating clinic process flow, space syntax and space adjacency analysis: Formalization of computational method in building programming
source	SIGRADI 2015 [Proceedings of the 19th Conference of the Iberoamerican Society of Digital Graphics - vol. 1 - ISBN: 978-85-8039-135-0] Florianópolis, SC, Brasil 23-27 November 2015, pp. 262-272.
summary	This paper presents a computational space adjacency analysis method by integrating information and analysis from process flow methods used in the healthcare system with space syntax methods used in architecture. These methods involve similar conceptual properties related to activity, space and flow. However, their implementation in the building programming process is disconnected, and relies solely on experience and expert opinions. The basic approach for the integration was by abstracting these similar properties in the process flow diagram, space connectivity diagram, and justified plan graph into nodes and edges representations. A case study of a clinic that is currently in the construction phase was used to develop the integration procedure and comparison analysis with the actual floorplan.
keywords	Spatial Adjacency, Process Flow, Space Syntax, Graph Theory, Building Programming
series	SIGRADI
email
last changed	2016/03/10 09:58

_id	sigradi2005_315
id	sigradi2005_315
authors	Pratschke, Anja
year	2005
title	From participation to collaboration: structuring digital knowledge environments
source	SIGraDi 2005 - [Proceedings of the 9th Iberoamerican Congress of Digital Graphics] Lima - Peru 21-24 november 2005, vol. 1, pp. 315-320
summary	This paper discusses ways to structure digital knowledge environments as process environments, tracing a parallel between participatory design processes, developed in the disciplinary area of architecture, and collaborative contemporary processes. These processes are supported by new information and communication technologies. At this context the key-words are interaction and auto-organization. The discussion draws on relations between the auto-organization model and the use of mnemonic techniques. These techniques of data organization – related to spatial structures, may constitute the informational organization rules: structuring the flow, storage and access, making auto-organization possible [Full paper in Portuguese]
series	SIGRADI
email
last changed	2016/03/10 09:58

_id	ecaade2012_281
id	ecaade2012_281
authors	Psarras, Stamatis ; Liapi, Katherine A.
year	2012
title	The Disassembly of a Musical Piece and its Conversion to an “Architectural” Pathway: An algorithmic approach
doi	https://doi.org/10.52842/conf.ecaade.2012.1.289
source	Achten, Henri; Pavlicek, Jiri; Hulin, Jaroslav; Matejovska, Dana (eds.), Digital Physicality - Proceedings of the 30th eCAADe Conference - Volume 1 / ISBN 978-9-4912070-2-0, Czech Technical University in Prague, Faculty of Architecture (Czech Republic) 12-14 September 2012, pp. 289-297
summary	This paper presents and discusses a process of transferring the main features of a piece of music such as structure, notes etc., to a primarily spatial construction in architecture. The main objective of this effort was to convert the linearity of time during the hearing of a musical piece into a continuous pathway and an architectural stroll on a given site. To this end, the musical piece is used as a source of data, which, with the use of developed algorithms, are converted into spatial data. A purely instrumental piece, “Air,” from the suite for strings in D major by Bach, provided the source data used in the design of Park D, a section of a Cultural Park in the suburbs of Athens, Greece. The developed algorithms presented in the paper include: a) an algorithm for generating the shape of the path and the space defi ning elements along the path, and b) an algorithm that generates the geometry of four harmonographic structures.
wos	WOS:000330322400029
keywords	Music and Architecture; Gestalt; Design Algorithms; Harmonograph
series	eCAADe
email
last changed	2022/06/07 08:00

_id	caadria2020_048
id	caadria2020_048
authors	Pung, Derek, Bui, Do Phuong Tung and Janssen, Patrick
year	2020
title	Automated Grading of Parametric Modelling Assignments - A Spatial Computational Thinking Course
doi	https://doi.org/10.52842/conf.caadria.2020.2.323
source	D. Holzer, W. Nakapan, A. Globa, I. Koh (eds.), RE: Anthropocene, Design in the Age of Humans - Proceedings of the 25th CAADRIA Conference - Volume 2, Chulalongkorn University, Bangkok, Thailand, 5-6 August 2020, pp. 323-332
summary	This paper describes the implementation and deployment of an automated grader used to facilitate the teaching of a spatial computational thinking course on the online education platform, edX. Over the period of a course on the platform, more than 3000 assignments were graded. As an evaluation of the grader, examples of assignments and statistical results are presented and discussed.
keywords	Automated Assessment; Parametric Modelling; MOOC
series	CAADRIA
email
last changed	2022/06/07 08:00

_id	caadria2014_088
id	caadria2014_088
authors	Puusepp, Renee
year	2014
title	Spatial Agglomerates
doi	https://doi.org/10.52842/conf.caadria.2014.585
source	Rethinking Comprehensive Design: Speculative Counterculture, Proceedings of the 19th International Conference on Computer-Aided Architectural Design Research in Asia (CAADRIA 2014) / Kyoto 14-16 May 2014, pp. 585–594
summary	This paper reports on the computational modelling research investigating spatial organisations often associated with unplanned settlements. Such spatial agglomerates are composed of several co-located but autonomous units (agents) that share common facilities and infrastructure (e.g. circulation). Depending on the context, units in the agglomerate represent individual dwellings, apartments or abstract spatial geometry. The paper presents early prototype models that can be interpreted at various scale, and a computational model for generating organic settlement layouts. The originality of the research resides within a new multi-agent algorithm for creating spatial organisations. The agglomeration process benefits from two distinct generative design strategies – self-organisation and adaptive development strategy. While the self-organisation accounts for the emergence of the global structure in the agglomeration, the adaptive development strategy ensures that the basic environmental and spatial requirements of each individual unit are satisfied.
keywords	Generative design; agent based modelling; object oriented design; unplanned settlements
series	CAADRIA
email
last changed	2022/06/07 08:00

_id	ecaaderis2018_114
id	ecaaderis2018_114
authors	Pyrillos, Theodoros
year	2018
title	Behavioural Space Configurations - Architectural Spatial Configuration from a Biological Standpoint
source	Odysseas Kontovourkis (ed.), Sustainable Computational Workflows [6th eCAADe Regional International Workshop Proceedings / ISBN 9789491207143], Department of Architecture, University of Cyprus, Nicosia, Cyprus, 24-25 May 2018, pp. 39-48
keywords	The following research, depicts a theoretical model of producing architectural spatial layouts. This is based on a more Biological View of Architectural space and concerns it self with the way that organisms (and in-turn we) perceive and interact with our environments. The model presented here emanates from a range of different fields and not only architectural theory and design. This research touches upon the fields architecture, mathematics, biology, behavioural psychology and has been inspired and draws heavily on the work done by Tim Ireland, as well as some of the work of Gregg Lynn and Alessandro Zomparelli, as well as the theoretical work of Uexküll and Kwinter. The model has began from a simple coding exercise and has developed into a detailed organism that acts and interacts with its environment. The end results present a bottom-up approach to spatial architectural layouts that are defined by the way the organism design interacts with given spatial qualities and other similar organisms with other given spatial qualities. The results retrieved from the coding exercises represent a more abstract -at this point- representation of space and have been slightly manipulated in other Modelling Packages to receive a clearer image.
series	eCAADe
email
last changed	2018/05/29 14:33

_id	cdrf2022_359
id	cdrf2022_359
authors	Qiaoming Deng, Xiaofeng Li, and Yubo Liu
year	2022
title	Using Pix2Pix to Achieve the Spatial Refinement and Transformation of Taihu Stone
doi	https://doi.org/https://doi.org/10.1007/978-981-19-8637-6_31
source	Proceedings of the 2022 DigitalFUTURES The 4st International Conference on Computational Design and Robotic Fabrication (CDRF 2022)
summary	Under the impact of globalization, the transformation of traditional architectural space is particularly important for the development of local architecture. As an important spatial component of traditional gardens, Taihu stone has the image characteristics of “thin, wrinkled, leaky and transparent”. The “transparency” and “ leaky” of Taihu stone reflect the connectivity and irregularity of the holes of Taihu stone, which are in line with the ideas of flowing space and transparency in contemporary architectural design. However, there are relatively few theoretical studies on the spatial analysis and design transformation of Taihu stone. The Pix2Pix model extracts the 3D spatial variation pattern by learning the variation pattern between two adjacent slices of Taihu stone. The trained Pix2Pix model can generate a series of continuous spatial sections with the spatial variation pattern of Taihu stone. Finally, the 2D sections are transformed into 3D building volumes to complete the spatial translation of Taihu stone in contemporary architectural design. In addition, this paper also provides a new idea for machine learning to master the continuous 3D spatial change pattern.
series	cdrf
email
last changed	2024/05/29 14:03

_id	architectural_intelligence2023_5
id	architectural_intelligence2023_5
authors	Qiaoming Deng, Xiaofeng Li, Yubo Liu & Kai Hu
year	2023
title	Exploration of three-dimensional spatial learning approach based on machine learning–taking Taihu stone as an example
doi	https://doi.org/https://doi.org/10.1007/s44223-023-00023-2
source	Architectural Intelligence Journal
summary	Under the influence of globalization, the transformation of traditional architectural space is vital to the growth of local architecture. As an important spatial element of traditional gardens, Taihu stone has the image qualities of being “thin, wrinkled, leaky and transparent” The “transparency” and “ leaky” of Taihu stone reflect the connectivity and irregularity of Taihu stone’s holes, which are consistent with the contemporary architectural design concepts of fluid space and transparency. Nonetheless, relatively few theoretical studies have been conducted on the spatial analysis and design transformation of Taihu stone. Using machine learning, we attempt to extract the three-dimensional spatial variation pattern of Taihu stone in this paper. This study extracts 3D spatial features for experiments using artificial neural networks (ANN) and generative adversarial networks (GAN). In order to extract 3D spatial variation patterns, the machine learning model learns the variation patterns between adjacent sections. The trained machine learning model is capable of generating a series of spatial sections with the spatial variation pattern of the Taihu stone. The purpose of the experimental results is to compare the performance of various machine learning models for 3D space learning in order to identify a model with superior performance. This paper also presents a novel concept for machine learning to master continuous 3D spatial features.
series	Architectural Intelligence
email
last changed	2025/01/09 15:00

_id	1ad0
id	1ad0
authors	Qu, Yingge; Schnabel, Marc Aurel
year	2009
title	Drawing Architecture using Manga Techniques
source	Managing IT in Construction / Managing Construction for Tomorrow, CIB W78, Attila Dikbas, Esin Ergen & Heyecan Giritli (eds.), CRC Press/Balkema, Istanbul, Turkey, pp.567-576
summary	Manga is a type of stylised bitonal drawings pleasing in terms of screen variety and tidy lines. In this paper, we present a method to draw architecture, spatial compositions and their details, including colours, textures, and tones, using manga drawing techniques. Given a colour image, such as photography, or drawing, our method finds the optimal solution for screening during the bi-tonal transformation, as well as a set of ideally abstracted line drawings. This offers a novel rendering appearance for the communication of architectural design. In our results we demonstrate successfully that our method generates manga-like drawings from an architectural image that preserve architectural key-elements, such as surface or material properties.
keywords	representation, visual communication, non-photorealistic rendering, multidimensional scaling, Manga
series	other
type	normal paper
email
last changed	2010/02/02 08:54

_id	sigradi2007_af35
id	sigradi2007_af35
authors	Quezada Gutiérrez, Marcelo Andrés
year	2007
title	Use of Film Techniques for Architectural Project Visualization [Uso de Técnicas Cinematográficas para la Visualización del Proyecto de Arquitectura]
source	SIGraDi 2007 - [Proceedings of the 11th Iberoamerican Congress of Digital Graphics] México D.F. - México 23-25 October 2007, pp. 413-417
summary	The developed work is framed inside the concept of "context visualization", applied to the Architectural field, using film techniques such as image based spatial and building reconstruction and three-dimensional object composition on images and video, using camera tracking techniques. In this paper, the methodology, contents and the current results of the experience and its future projections are described.
keywords	Architecture; Visualization; VFX; Reconstruction; Tracking
series	SIGRADI
email
last changed	2016/03/10 09:58

_id	lasg_whitepapers_2016_028
id	lasg_whitepapers_2016_028
authors	Rachel Armstrong
year	2016
title	Metabolic Systems
source	Living Architecture Systems Group White Papers 2016 [ISBN 978-1-988366-10-4 (EPUB)] Riverside Architectural Press 2016: Toronto, Canada pp. 028 - 043
summary	Living Architecture Systems Group "White Papers 2016" is a dossier produced for the occasion of the Living Architecture Systems Group launch event and symposium hosted on November 4 and 5 at the Sterling Road Studio in Toronto and the University of Waterloo School of Architecture at Cambridge. The "White Papers 2016" presents research contributions from the LASG partners, forming an overview of the partnership and highlighting oppportunities for future collaborations.
keywords	design, dissipative methods, design methods, synthetic cognition, neuroscience, metabolism, STEAM, organicism, field work, responsive systems, space, visualizations, sensors, actuators, signal flows, art and technology, new media art, digital art, emerging technologies, citizen building, bioinspiration, performance, paradigms, artificial nature, virtual design, regenerative design, 4DSOUND, spatial sound, biomanufacturing, eskin, delueze, bees, robotics
email
last changed	2019/07/29 14:00

_id	e541
authors	Radford Antony
year	1997
title	Games and Learning about Form in Architecture
doi	https://doi.org/10.52842/conf.ecaade.1997.x.p8d
source	Challenges of the Future [15th eCAADe Conference Proceedings / ISBN 0-9523687-3-0] Vienna (Austria) 17-20 September 1997
summary	The paper outlines metaphors of play and games in the use of digital media in architectural education as a means of developing student confidence and abilities in spatial modelling, design composition, and form creation.
keywords	Architecture, Games, Play, CAD, Modelling, Education, DesignDesign
series	eCAADe
email
more	http://info.tuwien.ac.at/ecaade/proc/radford/radford.htm
last changed	2022/06/07 07:50

_id	44be
authors	Radford, Antony
year	2000
title	Games and learning about form in architecture
source	Automation in Construction 9 (4) (2000) pp. 379-385
summary	Metaphors of play and games in the use of digital media in architectural education are described. The essence of 'games' lies in a person's immersion in play subject to rules. The paper argues that embracing these metaphors is an effective means of developing student confidence and abilities in spatial modelling, design composition, and form creation. Some examples are provided.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:23

_id	ga0225
id	ga0225
authors	Radojevic, Mirjana Devetakovic and Turner, Raewyn
year	2002
title	Spatial Forms Generated by Music – The Case Study
source	International Conference on Generative Art
summary	This paper resulted from the first stage of an ongoing collaborative research between a multi-senses artist (R. T.) from New Zealand and an architect interested in generic architecture (M. D.) from Yugoslavia. The research examines potential relations between music and architecture and explores the ways music could be a source for generation of spatial forms, and vice versa, whether architecture might generate music. In the first stage of the research two different existing generic principles were combined. The graphical interpretation of the music served as a pattern for creating the spatial forms. In this experiment the Brahms’s Hungarian Dance No1 has been used as an initial generator. The music is transformed into the sequence of linear drawings. Every single drawing potentially defines a spatial composition, while each single line represents an axis of the future spatial form. Together with geometric definitions there are some ambient values, like color, transparency and many others, that can be determined by music. After an overview of results, paper concludes with perspectives for future research that will include time as an additional dimension towards generating dynamic spatial concepts based on music.
series	other
email
more	http://www.generativeart.com/
last changed	2003/08/07 17:25

_id	a2b4
id	a2b4
authors	Rafi A, Khairul A, Samad A, Maizatul H, Mazlan M
year	2005
title	Improving spatial ability using a Web-based Virtual Environment (WbVE)
source	Automation in Construction
summary	Spatial ability is one of the cognitive means used in problem solving activities particularly when manipulating and processing visuo-spatial information. With the increasing use of network communication, conventional teaching and learning has shifted towards the development of network environments, online learning, real-time interaction and high quality multi-user collaboration. This paper presents our experiment using a Web-based Virtual Environment (WbVE) that has improved a group of pre-service teachers' spatial ability understanding for teaching Engineering Drawing for secondary school subjects. The experiment is carried out in Universiti Pendidikan Sultan Idris (UPSI) comprising of 98 pre-service teachers taking the Computer Aided-Design (CAD) course. Selected subjects were pre-tested at the beginning of the semester with spatial tests focusing on mental rotation and spatial visualization to provide the baseline measurement. A desktop WbVE, which was employed and tested in the CAD laboratories to improve their spatial ability for five weeks of instructional treatment, will be demonstrated. Post-testing of spatial tests revealed significantly the overall spatial ability improvements as measured by the test scores. This paper concludes with a discussion on the impact of WbVE spatial learning that will be used as a precedent in the development of the VE teaching and learning prototypes for secondary school in Malaysia.
keywords	Web-based virtual environment; engineering drawing; spatial learning
series	journal paper
type	normal paper
email
more	http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V20-4F9F8J7-1&_user=152310&_coverDate=12%2F31%2F2005&_alid=457968480&_rdoc=1&_fmt=summary&_orig=search&_cdi=5688&_sort=d&_docanchor=&view=c&_acct=C000012578&_version=1&_urlVersion=0&_userid=152310&md5=018e8748a940a11496dcbc2e65832452
last changed	2006/09/29 03:22

_id	cbfc
id	cbfc
authors	Rafi, A and Khairul Anuar, S
year	2007
title	The relationship of spatial experience, previous mathematics achievement and gender with perceived ability in learning engineering drawing
source	Journal of Technology Education, 18(2), 52-66.
summary	This study examined the relationships among three factors namely spatial experience, previous mathematics achievement and gender, with students’ perceived ability to learn Engineering Drawing at the foundation year. A correlational and regressional descriptive design was utilized involving 224 students of secondary schools. Two survey instruments comprising Spatial Experience Questionnaire (SEQ) and Student Questionnaire (SQ) were administered to elicit participants’ demographics and their perceived ability to learn the course. Correlational analysis found a significant correlation between perceived ability and spatial experience. Perceived ability was slightly correlated with previous mathematics achievement and gender. Regressional analysis attested spatial experience as the only variable to have a strong predictive power to account for variation in perceived ability.
keywords	spatial experience, engineering drawing, perceived ability
series	journal paper
type	normal paper
email
more	http://scholar.lib.vt.edu/ejournals/JTE/
last changed	2007/09/11 02:35

_id	f851
authors	Ramasubramanian, Pattanaik and Greenberg
year	1999
title	A perceptually based physical error metric for realistic image synthesis
source	Alyn Rockwood, editor, SIGGRAPH 99 Conference Proceedings, Annual Conference Series, ACM SIGGRAPH, Addison Wesley
summary	We introduce a new concept for accelerating realistic image synthesis algorithms. At the core of this procedure is a novel physical error metric that correctly predicts the perceptual threshold for detecting artifacts in scene features. Built into this metric is a computational model of the human visual system's loss of sensitivity at high background illumination levels, high spatial frequencies, and high contrast levels (visual masking). An important feature of our model is that it handles the luminance-dependent processing and spatiallydependent processing independently. This allows us to precompute the expensive spatially-dependent component, making our model extremely efficient. We illustrate the utility of our procedure with global illumination algorithms used for realistic image synthesis. The expense of global illumination computations is many orders of magnitude higher than the expense of direct illumination computations and can greatly benefit by applying our perceptually based technique. Results show our method preserves visual quality while achieving significant computational gains in areas of images with high frequency texture patterns, geometric details, and lighting variations.
series	other
last changed	2003/04/23 15:50

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