Abstract: The status of a device is controlled by detecting (403) the presence of a user; changing the status of a device to a first state (405) if the presence of a user is detected within a first, predetermined zone; changing the status of the device to the second state (407) if the presence of a user is detected outside a second, predetermined zone, the first, predetermined zone being smaller than and being wholly contained within the second, predetermined zone; and maintaining (407) the current state of the device if the presence of a user is detected outside of the first, predetermined zone and within the second predetermined zone.

Abstract: A system for determining a distance to an object comprises an image capture device (101) which has a coded aperture and an image sensor which is positioned out of a focus plane of the coded aperture. A receiver (103) receives an image of a scene from the image sensor and a detector (105) detects at least two image objects of the image corresponding to ghost images of the object resulting from different openings of the coded aperture in response to an optical characteristic of the object. A distance estimator (107) then determines a distance to the object in response to a displacement in the image of the at least two image objects. The distance may be to a person and the image may be a bright pupil image wherein pupils are enhanced by reflection of light by the retina. The image may be compensated by a dark pupil image of the scene.

Abstract: A system and method that measures an optical focus of a distant optical imaging system (EYE), in particular the ocular accommodation of a distant human subject. A luminous pattern of light (P1, A1) is projected by a projector (P) in focus (A2) at a known focal plane (FPL1) in front of the distant optical imaging system (EYE), and an image of the reflection of the pattern (A3) on a sensor surface of the distant optical imaging system (EYE), for instance the retina of an eye, is recorded by a camera (CAM) having an optical axis (AXCAM) coinciding at least partly with or situated close to the optical axis (AXP) of the projection device (P). The sharpness of the luminous pattern (A3) reflected from the sensor surface (retina) is determined.

Abstract: A lighting system (100) including at least one controller (102) and a memory (104) containing program portions which configure the controller (102) to obtain weather forecast information including one or more of current and expected weather conditions over a period of time; determine one or more lighting settings based upon the weather forecast information; form lighting setting information in accordance with the determined lighting settings; and transmit the lighting setting information. The system (100) may include an illumination source (106) to provide illumination in accordance with the lighting setting information The system may change characteristics (e.g., illumination pattern, illumination intensity, illumination spectrum, illumination polarization,) of the illuminated source (106). The process may form lighting setting information to control one or more filters (130) in accordance with a desired lighting setting.

Abstract: Lighting control system (100) for controlling luminaires (160) to enable illuminating a work surface (180) using the luminaires using the luminaires for rendering an image on the work surface, the lighting control system comprising a controller (120) for obtaining a dataset (102), the dataset comprising an input image (104) and illumination data (106), the illumination data being indicative of an illumination (162) of the work surface obtained by individual ones of the luminaires, a processor (140) for generating, independence on the dataset, drive data (144) for the luminaires for enabling a rendering (164) of the input image on the work surface, the processor being further configured for estimating, in dependence on the drive data and the input image, a rendering error (142) of the rendering, the controller being configured for obtaining a first dataset, the first dataset comprising a first input image and first illumination data, the controller being further configured for instructing the processor to esti

Abstract: An apparatus (1) estimates control features of remote controls (10) comprising cameras (11) for detecting light points (51, 52) from beacons (31, 32) located at or near devices (20) that are to be controlled via the remote controls (10) by letting the cameras (11) further detect light points (61, 62) from non-beacons (41, 42). Processors (2) estimate the control features in response to information from the detections of the light points (51, 52, 61, 62). The non-beacons (41, 42) comprise noise sources or any other sources different from the beacons (31, 32). Memories (3) store per time-interval the information per detection. The light coming from the beacons (31, 32) may be modulated light and the light coming from the non-beacons (41, 42) may be other light. The information may comprise coordinates, sizes and intensities of light points (51, 52, 61, 62) per detection and per time-interval.

Abstract: A predetermined type of ambient lighting is generated in which the influence of each of a plurality of luminaries on a predetermined type of ambient lighting is determined (203) and illumination of each of the plurality of luminaries is controlled (209) to generate said predetermined type of ambient light based on the determined influence of each of the plurality o f luminaries.

Abstract: A system for tracking the point of gaze of an observer observing an object comprises a camera for recording an image of an eye of the observer, comprises a means for providing a luminous marker, and means for analyzing the image of the eye to determine the reflection of the marker on the eye and the centre of the pupil. The relative positions of the corneal reflection of the marker and the pupil centre are measured. The marker is repositioned, in dependence on the determined relative positions, to improve correspondence between the corneal reflection of the marker and the pupil centre.

Abstract: The status of a device is controlled by detecting (403) the presence of a user; changing the status of a device to a first state (405) if the presence of a user is detected within a first, predetermined zone; changing the status of the device to the second state (407) if the presence of a user is detected outside a second, predetermined zone, the first, predetermined zone being smaller than and being wholly contained within the second, predetermined zone; and maintaining (407) the current state of the device if the presence of a user is detected outside of the first, predetermined zone and within the second predetermined zone.

Abstract: The present invention relates to a method and a system for detecting presence in a predefined space. The system comprises cascade connected sensors (s1, s2, . . . , sn), an output device (1), a control unit (2) and a processing unit (3). The method comprises the steps of activating a first sensor (s1) in the cascade and waiting until the first sensor detects presence. When presence is detected, a successive sensor (s2, . . . , sn) in the cascade is activated, and when the successive sensor (s2, . . . , sn) also detects presence the step of activating the successive sensor is repeated until all sensors in the cascade have been activated. If the successive sensor (s2, . . . , sn) does not detect presence the method returns to the waiting step of the first sensor. When the ultimate sensor in the cascade (sn) detects presence, a confirmation message is sent to the output device (1).