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Visual Monitoring of People in Private Spaces
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Transcript of Visual Monitoring of People in Private Spaces
Presentacin de PowerPoint
Francisco Flrez-RevueltaInterdisciplinary Hub for the Study of Health and Age-related conditions (IhSHA)
Visual monitoring of people in private spaces
Visual monitoring in public spaces
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.2
Sensors in private spaces
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.3
Cameras in private spaces
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.4
Fabien, C., Deepayan, B., Charith, A., & Mark, S. (2011). Video based technology for ambient assisted living: A review of the literature. Journal of Ambient Intelligence and Smart Environments (JAISE), 3(3), 253-269
Chaaraoui, A. A., Climent-Prez, P., & Flrez-Revuelta, F. (2012). A review on vision techniques applied to human behaviour analysis for ambient-assisted living. Expert Systems with Applications, 39(12), 10873-10888
Computer vision in AALFall detection and prevention
Identification of Activities of Daily Living
Behaviour monitoring
Physiological monitoring
Person-environment interaction
Rehabilitation
Support to people with cognitive impairment
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.5
Cons:Cluttered environmentsOcclusionsPrivacy preservationLimited field of view
Pros:Richer informationTracking of coarse and fine movements/actionsSynergies with other servicesEase to interpret
Pros and cons
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.6
Idea behind
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.7
Idea behind
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.8
Appropriate measures need to be considered to maintain privacy and increase acceptance
The notion of privacy is highly subjective. It depends on theindividual.
Several factors are involved:The private thingThe observer
An image conveys the following information about an individual:Identity (Who?)Appearance (How?)Activity / Behaviour / Event (What?)Time (When?)Location (Where?)
Privacy preservation
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.9
Image Redaction: Modify an image or a sequence of images so as to protect objects (visual clues) appearing on them
ButThe image must retain its utility
A trade-off between privacy protection and image utility is needed
Privacy must be adaptable to the individual
Ensuring visual privacy
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.10
We propose a privacy protection scheme that is aware of the context
A set of redaction methods is used
A context describes any situation:Identity of the observerIdentity of the observed person (to retrieve the privacy profile)Closeness between person and observer, e.g. relative, doctor, neighbourAppearance (dressed?)Location, e.g. kitchen, living roomEvent, e.g. cooking, watching TV, fall
Users provide their privacy preferences by linking instances of the context with protection/visualisation methodsPrivacy by context
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.11
Privacy by context
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.12
Visualisation levels
OriginalPixelateBlurEmbossSilhouetteSkeletonAvatarInvisibility
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.13
Visualisation levels
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.14
Tests with RGB-D cameras
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.15
Tests with RGB cameras
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.16
Improvement in the calculation of the contextIdentity (Who?)Appearance (How?)Activity / Behaviour / Event (What?)Time (When?)Location (Where?)
Improvement in foreground/person detection
Most of activity/behaviour identification systems are validated in labs, not in real environments
Privacy of the environment
Main issues: current and future work
AAL refers to intelligent systems for a better, healthier and safer life in the preferred living environment in order to compensate age-related functional limitations.17
Francisco (Paco) Flrez-Revuelta [email protected] @fflorezrevuelta staffnet.kingston.ac.uk/~ku48824 franciscoflorezrevuelta
No-Modification
Obta
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Blur Pixelation Emboss Silhouette Skeleton Invisibility