La presente invention concerne un type predetermine d'eclairage ambiant qui est genere. Dans ... more La presente invention concerne un type predetermine d'eclairage ambiant qui est genere. Dans ledit type predetermine d'eclairage ambiant, l'influence de chaque luminaire parmi une pluralite de luminaires sur un type predetermine d'eclairage ambiant est determinee (203) et l'eclairage de chaque luminaire parmi la pluralite de luminaires est commande (209) pour generer ledit type predetermine de lumiere ambiante en fonction de l'influence determinee de chaque luminaire parmi la pluralite de luminaires.
Il est un fait connu qu'il est possible d'emettre et de detecter de la lumiere codee, de ... more Il est un fait connu qu'il est possible d'emettre et de detecter de la lumiere codee, de sorte que des donnees soient modulees dans la lumiere. Selon un aspect de la presente invention, afin de reduire le risque que la modulation ne soit pas detectee du fait des eventuels angles morts dans le spectre de detection de frequence, le dispositif d'eclairage (2a, 2b, 2c) est concu de sorte que la frequence de sa lumiere modulee emise (3a, 3b, 3c) oscille autour d'une frequence de base ou centrale. Par exemple, la lumiere modulee (3a, 3b, 3c) peut etre transmise par modulation d'impulsions en largeur et le signal de lumiere a modulation d'impulsions en largeur (3a, 3b, 3c) peut ainsi avoir une periode qui fluctue au voisinage de la periode de base (T). Les parametres determinant le tremblement de la lumiere modulee (3a, 3b, 3c) peuvent etre choisis de sorte que le sautillement visible dans la lumiere modulee emise (3a, 3b, 3c) soit evite. Selon un autre aspect, le d...
LumaFluid is an interactive environment that explores new ways to stimulate emotional and social ... more LumaFluid is an interactive environment that explores new ways to stimulate emotional and social engagement through light. A vision system localizes people present in the LumaFluid square. Colored spotlights highlight each person and connections are drawn between neighboring visitors to underline and stimulate interpersonal communication. Two versions of the concept where deployed during the 2011 STRP Festival. In this paper we describe the conception and realization of the installation, and we discuss the insights collected during the event.
Families and friends are often separated by distance making it difficult for them to stay in touc... more Families and friends are often separated by distance making it difficult for them to stay in touch with each other. A prolific number of popular communication technologies and social are testimony how important informal and social communication with friends and family can be, and how this can drive industrial and business developments.
As a result of the technological advances and increasing focus on energy efficient buildings, sim... more As a result of the technological advances and increasing focus on energy efficient buildings, simple forms of building automation including automatic motorized blinds systems found their ways into today's office environments. In a five-month field study, qualitative and quantitative methods were used to investigate how office workers in 40 offices experience and use automatically controlled exterior venetian blinds with options for manual override and switching off the automatic mode. In total, 3433 blinds adjustments (average of 0.86 per office per day) were recorded, of which 73.6% was initiated by the user. Significant correlations between weather parameters and blind adjustments were found, including sunshine duration and user-triggered lowering of blinds (R = 0.354), cloud cover and user-triggered lowering of the blinds (R =-0.281), and outside temperature and user-triggered raising of blinds (R =-0.266). Four blinds usage profiles were identified and the underlying motivations for the different users were described. In the majority of offices, the automatic mode was switched off.
The possibility of automatic understanding of customers' shopping behavior and acting according t... more The possibility of automatic understanding of customers' shopping behavior and acting according to their needs is relevant in the marketing domain, attracting a lot of attention lately. In this work, we focus on the task of automatic assessment of customers' shopping behavior, by proposing a multi-* Corresponding Author.
Fast robust background subtraction under sudden lighting changes is a challenging problem in many... more Fast robust background subtraction under sudden lighting changes is a challenging problem in many applications. In this paper, we propose a real-time approach, which combines the Eigenbackground and Statistical Illumination method to address this issue. The first algorithm is used to reconstruct the background frame, while the latter improves the foreground segmentation. In addition, we introduce an online spatial likelihood model by detecting reliable background pixels. Extensive quantitative experiments illustrate our approach consistently achieves significantly higher precision at high recall rates, compared to several state-of-the-art illumination invariant background subtraction methods.
La presente invention concerne un type predetermine d'eclairage ambiant qui est genere. Dans ... more La presente invention concerne un type predetermine d'eclairage ambiant qui est genere. Dans ledit type predetermine d'eclairage ambiant, l'influence de chaque luminaire parmi une pluralite de luminaires sur un type predetermine d'eclairage ambiant est determinee (203) et l'eclairage de chaque luminaire parmi la pluralite de luminaires est commande (209) pour generer ledit type predetermine de lumiere ambiante en fonction de l'influence determinee de chaque luminaire parmi la pluralite de luminaires.
Il est un fait connu qu'il est possible d'emettre et de detecter de la lumiere codee, de ... more Il est un fait connu qu'il est possible d'emettre et de detecter de la lumiere codee, de sorte que des donnees soient modulees dans la lumiere. Selon un aspect de la presente invention, afin de reduire le risque que la modulation ne soit pas detectee du fait des eventuels angles morts dans le spectre de detection de frequence, le dispositif d'eclairage (2a, 2b, 2c) est concu de sorte que la frequence de sa lumiere modulee emise (3a, 3b, 3c) oscille autour d'une frequence de base ou centrale. Par exemple, la lumiere modulee (3a, 3b, 3c) peut etre transmise par modulation d'impulsions en largeur et le signal de lumiere a modulation d'impulsions en largeur (3a, 3b, 3c) peut ainsi avoir une periode qui fluctue au voisinage de la periode de base (T). Les parametres determinant le tremblement de la lumiere modulee (3a, 3b, 3c) peuvent etre choisis de sorte que le sautillement visible dans la lumiere modulee emise (3a, 3b, 3c) soit evite. Selon un autre aspect, le d...
LumaFluid is an interactive environment that explores new ways to stimulate emotional and social ... more LumaFluid is an interactive environment that explores new ways to stimulate emotional and social engagement through light. A vision system localizes people present in the LumaFluid square. Colored spotlights highlight each person and connections are drawn between neighboring visitors to underline and stimulate interpersonal communication. Two versions of the concept where deployed during the 2011 STRP Festival. In this paper we describe the conception and realization of the installation, and we discuss the insights collected during the event.
Families and friends are often separated by distance making it difficult for them to stay in touc... more Families and friends are often separated by distance making it difficult for them to stay in touch with each other. A prolific number of popular communication technologies and social are testimony how important informal and social communication with friends and family can be, and how this can drive industrial and business developments.
As a result of the technological advances and increasing focus on energy efficient buildings, sim... more As a result of the technological advances and increasing focus on energy efficient buildings, simple forms of building automation including automatic motorized blinds systems found their ways into today's office environments. In a five-month field study, qualitative and quantitative methods were used to investigate how office workers in 40 offices experience and use automatically controlled exterior venetian blinds with options for manual override and switching off the automatic mode. In total, 3433 blinds adjustments (average of 0.86 per office per day) were recorded, of which 73.6% was initiated by the user. Significant correlations between weather parameters and blind adjustments were found, including sunshine duration and user-triggered lowering of blinds (R = 0.354), cloud cover and user-triggered lowering of the blinds (R =-0.281), and outside temperature and user-triggered raising of blinds (R =-0.266). Four blinds usage profiles were identified and the underlying motivations for the different users were described. In the majority of offices, the automatic mode was switched off.
The possibility of automatic understanding of customers' shopping behavior and acting according t... more The possibility of automatic understanding of customers' shopping behavior and acting according to their needs is relevant in the marketing domain, attracting a lot of attention lately. In this work, we focus on the task of automatic assessment of customers' shopping behavior, by proposing a multi-* Corresponding Author.
Fast robust background subtraction under sudden lighting changes is a challenging problem in many... more Fast robust background subtraction under sudden lighting changes is a challenging problem in many applications. In this paper, we propose a real-time approach, which combines the Eigenbackground and Statistical Illumination method to address this issue. The first algorithm is used to reconstruct the background frame, while the latter improves the foreground segmentation. In addition, we introduce an online spatial likelihood model by detecting reliable background pixels. Extensive quantitative experiments illustrate our approach consistently achieves significantly higher precision at high recall rates, compared to several state-of-the-art illumination invariant background subtraction methods.
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Papers by Tommaso Gritti