Abstract: A method of controlling a light source (105) via a handheld computing device (110) is disclosed. The method comprises receiving an input produced by one or more sensors of the handheld computing device, the input being indicative of a current orientation of the handheld computing device. The method further comprises determining, based at least in part on the input, that the handheld computing device is in a predefined triggering orientation, e.g. in a generally horizontal orientation. In response to so determining, one or more frames of image data are acquired via an image sensor connected to the handheld computing device (110). The method further comprises obtaining an identifier of the light source, e.g. from information encoded into light emitted by the light source (105), having determined that the one or more frames of image data comprise image data representative of the light source (105).

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 center.

Abstract: An imaging system comprises a light field camera (3) for recording a hyperspectral light field (CLF). The system also comprises a light projector (4) for projecting a light field in visible light (PLF). The camera and the projector share a common optical axis. The projector projects a light field (PLF) based on the hyperspectral light field (CLF) captured by the light field camera.

Abstract: The invention relates to a method for enabling a user to control coded light (CL) sources. The method is performed after obtaining one or more images of a scene being illuminated by at least one CL source, the image of the CL source being present within the acquired image(s). The method includes processing the acquired image(s) to determine, based on the code embedded into the light output of the CL source, that the light output of that source is present within the scene, processing the acquired image(s) to determine the location of the image of the CL source within the acquired image(s), providing a user interface illustrating the scene, and providing a control icon within the user interface, the icon indicating to a user, based on the determined location of the CL source, that the icon is adapted to control the CL source.

Abstract: An apparatus for determining a propagation velocity for a surface wave comprises a coherent light source (105) for generating at least a first and a second light spot on a surface (103). A camera (111) captures at least one out-of-focus image of at least a part of the surface (103) comprising the light spots. The out-of-focus image comprises light spot image objects for the light spots where the light spot image objects have speckle patterns. An analyzer (113) determines the propagation velocity in response to a time difference between speckle pattern changes in the two speckle patterns. The camera may specifically use a rolling shutter allowing the determination of the propagation velocity to be based on a spatial analysis of the speckle patterns. The approach may in particular allow an efficient remote measuring of pulse wave velocities e.g. in animal tissue and in particular, in human tissue.

Abstract: A camera and camera system is provided with an optical device (8). The optical device creates simultaneously two or more images of object on a sensor (4) forming a compound image. The distance d between the constituting images of objects in the compound image is dependent on the distance Z to the camera. The compound image is analyzed (9), e.g. deconvolved to determine the distances d between the double images. These distances are then converted into a depth map (10).

Abstract: There is disclosed a sensing device (100) adapted to receive light emitted from a plurality of light sources (A, B), each of the plurality of light sources (A, B) emitting light comprising a light source identifier. The sensing device (100) comprises a sensing module (110) comprising a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B) and a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B). The light selection unit (114) is adapted to selectively convey a selected portion of light received by the light selection unit (114) to a second photo sensor unit (116). The light selection unit (114) is arranged relatively to the first photo sensor unit (112), or vice versa, in such a way that the selected portion of light is associated with a photo sensor of a plurality of photo sensors of the first photo sensor unit (114) detecting light.

Abstract: There is provided a method for detecting modulated light comprising: receiving a set of images acquired by means of a rolling shutter camera having image acquisition settings comprising a frame rate, fframe, and a line rate, fline; identifying in consecutive frames of said images—a pattern governed by the ratio between a modulation frequency, fc, of a modulated light source and the line rate, fline, and—between consecutive frames a spatial shift of said pattern governed by the ratio between said modulation frequency fc, and said frame rate, fframe; and providing based on said pattern and spatial shift thereof, an estimate of the modulated light amplitude from said light source.

Abstract: A system for output of virtual output images includes an array of image capturing devices for providing image data. This image data is processed by convolving the image data with a function, e.g., the path, and thereafter deconvolving them, either after or before summation, with an inverse point spread function or a filter equivalent thereto to produce all-focus image data.

Abstract: The possibility to emit and detect coded light, whereby data is modulated into the light, is known. According to one aspect of the present disclosure, to reduce the risk of the modulation going undetected due to possible frequency blind spots in the detection spectrum, the lighting device (2a, 2b, 2c) is arranged such that the frequency of its emitted modulated light (3a, 3b, 3c) shivers around a base, or center, frequency. For example the modulated light (3a, 3b, 3c) may be transmitted using pulse-width-modulation, and the resulting pulse-width-modulation light signal (3a, 3b, 3c) may thus have a period that fluctuates around the base period (T). The parameters determining the shivering of the modulated light (3a, 3b, 3c) may be chosen such that visible flicker in the emitted modulated light (3a, 3b, 3c) is avoided. According to another aspect, the lighting device (2a, 2b, 2c) emits with a plurality of different modulation frequencies simultaneously.

Abstract: The invention relates to a detection system for determining data embedded into the light output of a light source in a form of a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. The processing unit is configured to process the acquired series of images to determine the repeating sequence of N symbols. By carefully triggering when a shutter of the camera is open to capture the different symbols of the encoded light within each frame time of a camera, a conventional camera with a relatively long frame time may be employed. Therefore, the techniques presented herein are suitable for detecting the invisible “high frequency” coded light while using less expensive cameras as those used in the prior art.

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: According to one aspect of the disclosure, a lighting system comprises a remote control unit (4) and at least one lighting device (2a, 2b, 2c) comprising a light driver (13) and a light emitter (14). The remote control unit (4) comprises an image capturing unit (5) and is arranged to control the lighting device (2a, 2b, 2c). To do so, the remote control unit (4) receives information relating to current/present settings of the image capturing unit (5), then determines one or more properties of signals for visible light communications based on these settings. The one or more properties are then communicated to the at least one lighting device (2a, 2b, 2c). Upon reception thereof the light driver (13) generates a light emitting control signal based on the received properties and visible light communications based on the light emitting control signal is emitted by the light emitter (14).

Abstract: The present invention relates to a light detector arranged to detect coded light emitted from at least one light source. The light detector (100) includes a photo detector (102), which is arranged to detect the coded light. The light detector further has an image sensor (104), and a screen (106), wherein a field of view of the photo detector is within the field of view of the image sensor. The light detector is arranged to display an image captured by the image sensor and comprising a light source, the coded light of which is detected by the photo detector, on the screen. The present invention also relates to a method of detecting light emitted from at least one light source.

Abstract: A display device (40) comprising: a display panel (41) comprising a set of pixels (41R, 41L) the pixels being spatially distributed over the display panel, and each pixel being for providing a light output, the set of pixels comprising a plurality of different subsets (411) of pixels, each subset of pixels comprising one or more pixels of the set of pixels, an imaging unit (42) arranged for imaging the one or more pixels of a subset of pixels to form pixel images on a plurality of view areas on an imaginary plane located at a first distance in front of the display, the plurality of view areas not overlapping each other, with at least one pixel image of each one of the different subsets of pixels overlapping on a same one of the plurality of view areas, the imaginary plane comprising an imaginary circle having the diameter of the pupil of an eye, and the imaginary circle enclosing at least a part of at least two of the plurality of view areas, where the at least two of the plurality of view areas at least part

Abstract: A method is disclosed for determining anatomical properties of a patient, the patient having an oral cavity and a throat, comprising a) projecting at least one structured light pattern into the patient's oral cavity; b) detecting at least one reflected light pattern, each of the reflected light patterns emanating from reflection of a corresponding projected structured light pattern; c) analysing the at least one reflected structured light pattern in view of the at least one structured light pattern, thereby determining anatomical properties of the patient; and an associated imaging device.

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: The invention relates to a detection system for determining whether a light contribution of a light source is present at a selected position within a 2D scene. The light contribution includes an embedded code comprising a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. Each image includes a plurality of pixels, each pixel representing an intensity of the light output of the light source at a different physical position within the scene. The processing unit is configured to process the acquired series of images to determine whether the light contribution of the first light source is present at the selected physical position within the scene by e.g. correlating a sequence of pixels of the acquired series corresponding to the selected physical position with the first sequence of N symbols.

Abstract: There is disclosed a sensing device (100) adapted to receive light emitted from a plurality of light sources (A, B), each of the plurality of light sources (A, B) emitting light comprising a light source identifier. The sensing device (100) comprises a sensing module (110) comprising a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B) and a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B). The light selection unit (114) is adapted to selectively convey a selected portion of light received by the light selection unit (114) to a second photo sensor unit (116). The light selection unit (114) is arranged relatively to the first photo sensor unit (112), or vice versa, in such a way that the selected portion of light is associated with a photo sensor of a plurality of photo sensors of the first photo sensor unit (114) detecting light.