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"Crowd-based Illuminance Maps: Comparing Daylight Perception" by Muhammad Hegazy

Speakers

Muhammad Hegazy

PhD candidate

Architectural Morphology Laboratory

Presentation from the 8th VELUX Daylight Symposium that took place in Paris on 9 October 2019. For more information please visit http://thedaylightsite.com & https://www.velux.com/veluxdaysinparis

 

Daylighting plays a key role in making space more sustainable and livable. Thus, using light simulation tools to assess daylight performance is considered as a vital stage in the design process of any building. Many studies focus on measuring the quantitative performance of daylighting through climate-based daylight modeling [1]. However, it is also important to assess daylighting in more than mere numerical values and go further to address its subjective qualities and human-oriented experience [2]. In this context, Virtual reality(VR) has found its way as an essential tool to a wide variety of applications in architecture, ranging from design and construction to project’s communication and collective decision-making pushed forward by the trending design democratization and participatory design directions [3].

 

Moreover, current advancements in VR hardware, as well as game engine technology prove promising horizons towards the realization of hyper-realistic VR environments, where users can not only immerse in but also interact with and give useful feedback. Many studies have addressed VR as an evaluative tool for daylighting, including the works of Chamilothori et al.[4] and Rockcastle et al.[5]. However, the authors argue three main limitations in the current related literature; Firstly, many studies on visual perceptions in VR are limited to small-scale, simple scenario environments, which lacks the complexity, vastness and variety required for validating daylighting subjective qualities on a wider scale. Secondly, reliance on head movement only rather than full walkability, which can limit user-environment interaction and thus bound accurate perception feedback. Another noticeable limitation is the mere use of verbal questionnaires to collect user responses rather than integrating gamified tasks into the virtual environment itself.

 

This paper describes an ongoing research that introduces a novel approach to measure human perception of daylight in virtual built environments through applying principles of immersion and gamification. Nevertheless, it investigates the consistency between user-reported brightness levels and physically-based illuminance simulations of the same space. To validate the methodology, a digital model of Kimbell Art Museum by Louis Kahn is created (Figure 1) , imported into Unreal Engine to setup location-based light rendering and interactive content, which offers the ability to walk freely, control daytime (sun position), switch on/off artificial lights, and saving snapshots. Then, through Head-Mounted Display and motion controllers, users are challenged to fulfill lighting-related tasks, this includes snapshotting best day lit spots, reporting poor day lit areas, as well as estimating floor brightness at given points on a 0-100 scale. Afterwards, a post-experience questionnaire is given to evaluate both system usability and daylighting quality. Finally, the collective user feedback is used to create a crowd-based light intensity maps for the floor plan at a given date/time, which are compared against similar empirical illuminance maps (in Lux) generated through physically-based simulations.

 

Muhammad Hegazy is currently a PhD candidate at the Architectural Morphology Laboratory in Osaka University, and holds a Master of Science in Environmental Design from Suez Canal University in Egypt. He has worked for Takenaka Corporation in Japan, and been invited as a speaker at the Architectural Association visiting school (AAVS) in Osaka. His doctoral research focuses on improving human-centered daylight performance in indoor environments. By comparing daylight perception in immersive virtual reality to other quantitative measurements, he aims to introduce a set of unified daylight performance metrics that consider both subjective and physical qualities of daylighting.

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"The Value of Daylight in Office Buildings" by Christoph Reinhart

Ibbotson Family 500X500

"Just Like Living Outside" by Family Ibbotson Testimonial

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"Daylight and Energies" by Nicolas Michelin

Daylight 2009 Javierdelrio

SOLAR HEAT VS. SOLAR LIGHT by Javier del Rio

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CALL FOR ABSTRACTS EXTENDED FOR 3RD VELUX DAYLIGHT ACADEMIC FORUM

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DAYLIGHT ANALYSIS IN THE DESIGN PROCESS OF RESIDENTIAL BUILDINGS

Sinus Lynge And Camilla Van Deurs On Communities (New)
Communities

Sinus Lynge and Camilla van Deurs on Communities

Arlind Dervishaj On Computational Design (New)
Computational Design

Arlind Dervishaj on Computational Design

Daylight 2007 Janejhed

DAYLIGHT + EDUCATION + TOOLS, INTRODUCTION by Jan Ejhed

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THE 6TH VELUX DAYLIGHT SYMPOSIUM CONFIRMED SPEAKERS

John Mardaljevic On Computational Design2
Computational Design

John Mardaljevic on Computational Design

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“Value creation by architectural design – daylight as a positive driver” by Peter Andreas Sattrup

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INSPIRING STORY TELLERS AND EXPLORERS CONNECT OUR WORLD

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FINAL PROGRAMME NOW AVAILABLE FOR THE 6TH VELUX DAYLIGHT SYMPOSIUM

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DISCOURSE – FORWARDS TO NATURE

Jakob Brandtberg Knudsen And Seda Kacel On Health (New)
Health

Jakob Brandtberg Knudsen and Seda Kacel on Health

Li Hu On Daylight In Architecture (Asia)
Daylight in Architecture

Li Hu on Daylight in Architecture (Asia)

VELUX Daylight Symposium 21

97 PHOTOS FROM 7TH VELUX DAYLIGHT SYMPOSIUM IN BERLIN

Louis Becker And Chris Precht On Daylight In Architecture (Europe)
Daylight in Architecture

Louis Becker and Chris Precht on Daylight in Architecture (Europe)

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"Transforming Cities" by Andy Cornaby

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4th VELUX DAYLIGHT ACADEMIC FORUM DEDICATED TO PhD STUDENTS WORKING WITH DAYLIGHT RESEARCH

Nadim Stub, Anita Derjanez And Frederik Noltenius On Health (New)
Health

Nadim Stub, Anita Derjanez and Frederik Noltenius on Health

Light Cultures – New Technologies, Aesthetics, and Climate Policies

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REGISTRATION NOW OPEN FOR 6TH VELUX DAYLIGHT SYMPOSIUM IN LONDON ON 2-3 SEPTEMBER 2015

Lid Display

Lighting Design Students create new lighting possibilities for the Absalon Church

Lighting Visions

Lighting Visions: Light, Space and Nature

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"Window Size Effects on the Atmosphere of Daylit Spaces at High Latitudes" by Claudia Moscoso

Markus Pendlmayr On Communities
Pecha KuchaCommunities

Markus Pendlmayr on Communities | Pecha Kucha

Alejandro Pacheco Dieguez And Marie Claude Dubois On Computational Design (New)
Computational Design

Alejandro Pacheco Dieguez and Marie Claude-Dubois on Computational Design

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What Attracts Our Visual Attention?" by Caroline Karmann

Claire Kimball Johnson On Health (1)
Pecha KuchaHealth

Claire Kimball Johnson on Health | Pecha Kucha

Much Untertrifaller On Flexible Pecha Kucha
Pecha KuchaFlexible

Much Untertrifaller on Flexible | Pecha Kucha

Daylight 2009 Christophemartinsons

THE ROLE OF DAYLIGHT IN THE EXISTENT AND FUTURE FRENCH BUILDING REGULATIONS by Christophe Martinsons

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David Nelson at the 6th VELUX Daylight Symposium

Marcus Fairs, Kasper Guldager, Susanne Brorson And James Drinkwater On Environment 2 (2)
Environment

Marcus Fairs, Kasper Guldager, Susanne Brorson and James Drinkwater on Environment

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“Is daylight enough? Taking a holistic, human perspective” by Peter Barrett

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"Daylight: a Concept and a Design Deriver" by Maha Shalaby

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"Quantitative and qualitative assessment of visual comfort in offices" Laura Thuillier

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"Applying the New European Daylighting Standard" by Inger Erhardtsen & Werner Osterhaus

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"Light, Architecture, and our Experience of Space" by Kynthia Chamilothori

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"The future is light" by Per Arnold Andersen

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2 INSIGHTFUL DAYS AT THE 6TH VELUX DAYLIGHT SYMPOSIUM IN LONDON

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“Daylight research from knowledge to practice: The tortoise and the guerrilla” by John Mardaljevic

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More daylight is needed to create sustainable buildings

Sneha Jain, Eleonora Brembilla And Christian Humann On Glare And Control
Glare and Control

Sneha Jain, Eleonora Brembilla and Christian Humann on Glare and Control

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"An Explorative Study on Impact of Daylight and View among Operating Room Nurse" by Marielle Aarts

Lone Wiggers Web

LONE WIGGERS: LIVE KEYNOTE FROM THE 7th VELUX DAYLIGHT SYMPOSIUM

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"Radiance – the Interaction of Light and Matter in Building Simulations" by Greg Ward

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OCCUPANCY-BASED LIGHTING CONTROL – DEVELOPING AN ENERGY SAVING STRATEGY THAT ENSURES OFFICE WORKERS’ COMFORT

Daylight 2011 Truusdebruinhordijk

VISUAL COMFORT FOR SENIORS by Truus de Bruin-Hordijk

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BODY CLOCKS, LIGHT, SLEEP AND HEALTH

Daylight 2007 Ingeborgschramm

SONDERSCHULE SCHWECHAT – USER EVALUATION by Ingeborg Schramm

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“The Multi-Layer City, Reinventing Paris” by Rasmus Astrup & Frederic Chartier

Lucile Sarran On Flexible
Pecha KuchaFlexible

Lucile Sarran on Flexible | Pecha Kucha

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Lonn Combs at the 6th VELUX Daylight Symposium

Claire Kimball Johnson And Lærke Hein On Affordability
Affordability

Claire Kimball Johnson and Lærke Hein on Affordability

January 1 2

CAPTURE THE SUN!

Unesco (1)

UNESCO PROCLAIMS MAY 16TH AS THE INTERNATIONAL DAY OF LIGHT

Augustesen 01

ARCHITECTURE FOR THE SENSES

Per Arnold Andersen On Daylight Education (New)
Daylight Education

Per Arnold Andersen on Daylight Education

Daylight Research Post2

GET FURTHER INSIGHTS INTO YOUR DAYLIGHT RESEARCH

Eleonora

READING THE WEATHER

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CIRCADIAN RHYTHMS & BUILDING DESIGN DISCUSSIONS AT HEALTHY BUILDINGS 2015

Closure Keithriddle Healthybuildingsday

Healthy Buildings Day closure by Keith Riddle

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"Creating Architecture with Daylight" by Steffen Vogt

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"Rethink Daylight" by Giulio Camiz

Zakaria Djebbara On Health (1080P).00 44 23 05.Still002
Health

Marco Imperadori and Lasse Lind on Health

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"Daylight Modeling and Simulation Standards" by Zack Rogers

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"Can Natural Lighting Shape Architecture?" by Sebastian Moreno Vacca & Aline Branders

Daylight 2011 Myriamaries&Laurenszonnefeldt

DAYLIGHT DYNAMICS WITH REGARD TO HUMAN NEEDS by Myriam Aries and Laurens Zonneveldt

Blog Ways Into The Light

WAYS INTO THE LIGHT

Song Yehao On Daylight In Architecture (Asia)
Daylight in Architecture

Song Yehao on Daylight in Architecture (Asia)

Joseph Allen On Health
Health

What makes a building healthy? | Joseph Allen

Daylight 2009 Keesduijvestein

SUSTAINABLE BUILDING DESIGN IN RELATION TO DAYLIGHTING by Kees Duijvestein

Daylight 2007 Zackrogers

OVERVIEW OF DAYLIGHT SIMULATION TOOLS (DIGITAL AND PHYSICAL METHODS) by Zack Rogers

Mojtaba Parsaee On Light And Health
Light & Health

Mojtaba Parsaee on Light and Health

Martin Haas On Communities
Pecha KuchaCommunities

Martin Haas on Communities | Pecha Kucha

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Explore the knowledge - Sign up for more

Daylight 2011 Annekathrinefrandsen

THE HEALING POTENTIAL OF DAYLIGHT IN HOSPITAL SETTINGS by Anne Kathrine Frandsen

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LIGHT TO LIFE

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"Think Natural Light" by Vincent Le Garrec

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3rd VELUX DAYLIGHT ACADEMIC FORUM DEDICATED TO PhD STUDENTS WORKING WITH DAYLIGHT RESEARCH

Sergio Altomonte, Marilyne Andersen And Signe Sand On Quality (New)
Quality

Sergio Altomonte, Marilyne Andersen and Signe Sand on Quality

Daylight 2011 Jean Louis Scartezzini

STATE OF THE UNION IN DAYLIGHTING AT EPFL by Jean-Louis Scartezzini

Alstan Jakubiec On Computational Design
Computational Design

Alstan Jakubiec on Computational Design

Daylight 2007 Jamesbenya

DAYLIGHT + SCHOOLS = HEALTH + LEARNING + SUSTAINABILITY by James Benya

Hero Koen Steemers 640X425

8th VELUX DAYLIGHT SYMPOSIUM IN PARIS 9 OCTOBER 2019

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THE DAYLIGHT SITE IS MOVING TO A NEW ADDRESS

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FOCUSING ON PEOPLE WITH CLEAR PRIORITIES TOWARDS BETTER ARCHITECTURE

A CIBSE Daylight Group event: Assessing new metrics for daylight prediction

Kevin Van Den Wymelenberg, Nicole Porter, Ayesha Batool, Natalia Vasquez, Till R
Pandemics

Kevin Van Den Wymelenberg, Nicole Porter, Ayesha Batool, Natalia Giraldo Vasquez, Till Roenneberg - Pandemics

Francisca Rodriguez On Contact To The Outdoors
Contact to the Outdoors

Francisca Rodriguez on Contact to the Outdoors

Daylight 2009 Paulkalkhoven

DESIGNING WITH DAYLIGHT UNDER LARGE ROOFS by Paul Kalkhoven

Daylight 2011 Perarnoldandersen

WELCOME TO THE 4TH SYMPOSIUM by Per Arnold Andersen

TDS Infographics

TOWARDS AN IDENTIFICATION OF EUROPEAN INDOOR ENVIRONMENTS’ IMPACT ON HEALTH AND PERFORMANCE

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"An Illustrated Address" by Thomas Vonier

Femke Beute On Contact To The Outdoors
Contact to the Outdoors

Femke Beute on Contact to the Outdoors

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"Buildings of the Future Need Light and Chronobiology” by Till Roenneberg

Augustesen 01 (1)

ARCHITECTURE FOR THE SENSES

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LIGHT-DRIVEN MODEL FOR IDENTIFYING INDICATORS OF NON-VISUAL HEALTH POTENTIAL IN THE BUILT ENVIRONMENT