CROWD-BASED ILLUMINANCE MAPS/media/com/velux days... · • Unorthodox daylighting qualities....
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CROWD - BASED ILLUMINANCE MAPS: COMPARING DAYLIGHT PERCEPTION IN VIRTUAL REALITY TO EMPIRICAL METRICS Muhammad Hegazy PhD Candidate, Architectural & Urban Morphology Lab, Osaka University [email protected] - u.ac.jp Prof. Hirokazu Abe thesis director Dr. Kensuke Yasufuku thesis co - director VELUX Daylight Symposium October 9 th - 10 th 2019, Paris
Transcript of CROWD-BASED ILLUMINANCE MAPS/media/com/velux days... · • Unorthodox daylighting qualities....
CROWD-BASED ILLUMINANCE MAPS:
COMPARING DAYLIGHT PERCEPTION IN VIRTUAL REALITY TO EMPIRICAL METRICS
Muhammad HegazyPhD Candidate, Architectural & Urban Morphology Lab,
Osaka University
Prof. Hirokazu Abethesis director
Dr. Kensuke Yasufukuthesis co-director
VELUX Daylight Symposium
October 9th-10th 2019, Paris
Muhammad Hegazy
Architectural Morphology Lab,Cybermedia Center Osaka University, Japan
BIM VR
AR
Community-based Design
Crowd Simulation
User-Oriented Design
Computational Design
Cyber Society
Game Design
Urban Regeneration
AI
Real-time Rendering
Muhammad Hegazy
(Miriam Espacio, 2019)
DAYLIGHT PERFORMANCE
USER-CENTERED
DESIGN
IMMERSIVE VIRTUAL REALITY
HOW CAN DAYLIGHT PERFORMANCE METRICS BE MORE USER-ORIENTED?
Muhammad Hegazy
Introduction Daylighting Impact on Buildings’ Occupants
90%
46mins
16% 15%
44%
Up to40%
Time spent indoorsVariation of annual learning progress
More creative
State daylight as 1st need in workplace
Gain in productivity More sleep per night
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1.(Sustania, 2012)2.(Barrett, 2015)3.(Global Human Spaces Report, 2015)4.(Boubekri, 2014)
(i-buildmagazine.com, 2019)
Muhammad Hegazy
The dilemma of Daylight Quantitative Metrics
• Physically accurate.• Essential for design stage.
• Don’t reflect occupant behavior.• “Generic” user models.
(Velux, 2019)
Illuminance
Daylight Autonomy
Luminance
Annual Sunlight Exposure
Useful Daylight Illuminance
(view.com, 2018)
Visual comfort
Building Performance Simulations (BPS)
Building’s occupants
?
Productivity
Perception
Behaviors
Occupational rates
LEED certified buildings don’t always perform better than their traditional counterparts, and
sometimes they perform even worse.
(Newsham et al., 2012)
Muhammad Hegazy
Perceptual qualities of daylighting
Assessing daylight based on human perception is as important as quantitative
measurements.
(Paredes, 2016)
Immersive Virtual Environments (IVEs) are adequate to investigate human
perception of daylighting.
(Chamilothori, 2018)
Immersivefull visual field, sensation
of presence.
Virtualmobile, flexible, safe,
economic
Environmentrealistic, scale-free,
customizable
Muhammad Hegazy
Limitations on current studies
• simple, small scale spaces.• focus on office spaces only.
• one standing point.• Lack of interaction (customization)
• Questionnaires dependent.• No integrated challenges/tasks.
Lack of Richness Lack of Locomotion Lack of Interactivity
Muhammad Hegazy
How to improve outputs of daylight perception in IVEs against quantitative metrics?
Crowd-Based Illuminance Maps
Photorealistic Explorable Customizable GamifiedLarge-Scale
Muhammad Hegazy
Experiment case study
Kimbell Art Museum, Fortworth TX
• By Louis Kahn.• Unorthodox daylighting qualities.
(kimbellart.org, 2019)
Muhammad Hegazy
Experiment case study
Real life Real-time RaytracingCPU Rendering
(kimbellart.org, 2019)
Muhammad Hegazy
Experiment workflowS
TAR
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Users are introduced to the experiment room.
A brief introduction about the experiment, .
User is asked to wear the headset.
A sample VR scene.
main VR space (Kimbell Museum).
change daytime between morning (9AM) and afternoon (6PM).
User is asked to explore different areas of the VR space.
User can switch on or off spotlights.
snapshot the scenes they perceive
daylighting differently.
rank each snapshotted scene as
(very dark, dark, bright, very bright)
Muhammad Hegazy
Experiment workflow
Muhammad Hegazy
Generating crowd-illuminance maps
Users snapshots Crowd camera map
Muhammad Hegazy
9AM 6PM
Generating crowd-illuminance maps
Muhammad Hegazy
Comparing perception maps to quantitative simulations
Illuminance map (VELUX Daylight Visualizer)Crowd based illuminance
Ambient environment Luminous flux on surface
Surround Based Metric?
X
Muhammad Hegazy
Comparing perception maps to quantitative simulations
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Image-based luminosity mean values (9 AM)
Muhammad Hegazy
Comparing perception maps to quantitative simulations
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mean luminosity values
Correlation between user perception and mean luminosity for a given spot at 9AM
Muhammad Hegazy
Comparing perception maps to quantitative simulations
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Muhammad Hegazy
Future research challenges
Why mixed perceptionhappen?
Consistency with further daylight metrics?
Overcoming VR limitations?
A unified metric that consider both subjective and quantitative qualities of daylighting
THANK YOU
Muhammad HegazyPhD Candidate at Architectural & Urban Morphology Lab,
Osaka University
VELUX Daylight Symposium
October 9th-10th 2019, Paris
