A liveness detection method includes: controlling a display screen to display a color according to a predetermined color display sequence, the color display sequence including at least two different colors; capturing an image of a target object in a color display process of the display screen; acquiring a color change sequence of a face of the target object in the image over time; and determining whether the target object is live based on a matching relationship between the color display sequence and the color change sequence.

A miniaturized structured light projection module is provided. The miniaturized structured light projection module includes a light source assembly and a projecting lens. The light source assembly has a plurality of light source units, each of which is provided with a default projected pattern on its surface. The projecting lens is disposed above the light source units. The default projected patterns of the light source units are disposed on a front focal plane of the projecting lens.

A light emitting device includes a wiring substrate, a light emitting element array that includes a first side surface and a second side surface facing each other, and a third side surface and a fourth side surface connecting the first side surface and the second side surface to each other and facing each other, the light emitting element array being provided on the wiring substrate, a driving element that is provided on the wiring substrate on the first side surface side and drives the light emitting element array, a first circuit element and a second circuit element that are provided on the wiring substrate on the second side surface side to be arranged in a direction along the second side surface, and a wiring member that is provided on the third side surface side and the fourth side surface side and extends from a top electrode of the light emitting element array toward an outside of the light emitting element array.

An arrangement for processing of value documents at a preparation station, prior to their processing by means of a value document processing apparatus, involves inserting the value documents into a container divided into several storage regions. The value documents of the respective deposit are removed at the preparation station from delivery containers which respectively include a unique deposit identification. A monitoring device automatically captures into which storage region of the value document container the value documents are inserted. A protocol device connected to the monitoring device links the respective deposit identification to the container identification and to the respective storage region identification and transmits this linking information to a control device or to an accounting device, which assigns the value documents present in the respective storage region of the respective value document container to the respective deposit with the aid of the linking information transmitted by the protocol device.

The invention relates to a method for distinguishing, detecting and counting persons and/or objects in facilities and/or vehicles for conveying persons and/or goods, with the method steps: emitting radiation from a radiation source, deflecting the radiation with an element for deflecting the radiation, generating a light pattern in a detection region, detecting the radiation backscattered by persons and/or objects situated in the detection region in a radiation detector, and counting the persons and/or objects in a counting region, wherein the counting region is arranged in a region between 30 cm in front of and 30 cm behind an entrance to facilities and/or to the vehicle for conveying persons and/or objects. The invention also relates to a corresponding device for performing the method.

Systems and methods for optical sensing, visualization and detection in media (e.g., turbid media; turbid water; fog; non-turbid media). A light source and an image sensor are positioned in turbid media or external to the turbid media with the light source within a field of view of the image sensor array. Temporal optical signals are transmitted through the turbid media via the light source and multiple perspective video sequence frames are acquired via the image sensor array of light propagating through the turbid media. A three-dimensional image is reconstructed from each frame and the reconstructed three-dimensional images are combined to form a three-dimensional video sequence. The transmitted optical signals are detected from the three-dimensional video sequence by applying a multi-dimensional signal detection scheme.

A light sensor has a matrix of sensing elements each providing a respective event-based signal sequence including events asynchronously produced as a function of variations of light incident on the sensing element and light level values respectively associated with at least some of the events. The method generates an image comprising pixels corresponding spatially to the sensing elements of the matrix, and determines a set of edge pixels among the pixels of the image. Pixels are selected in response to events included in the event-based signal sequences and for each selected pixel a local contrast measure is evaluated to decide whether or not the selected pixel belongs to the set of edge pixels.

The present disclosure provides a detection system for detecting matter and distinguishing specific matter from other matter. The detection system comprises at least one light source arranged to emit one or more light beams having a known wavelength or wavelength range. Further, the detection system comprises at least one optical element configured to direct the one or more light beams onto a plurality of locations within an area of interest including the matter. The detection system also comprises a detector for detecting intensities of the one or more light beams reflected at the plurality of locations within the area of interest including the matter. In addition, the detection system comprises an outcome determination system. The system is arranged to obtain information indicative of at least a portion of a shape of at least some of the matter based on detected light intensities of the one or more light beams reflected at the plurality of locations. The system is also arranged to obtain information indicative of a spectral intensity distribution based on detected light intensities of the one or more light beams reflected at the plurality of locations. The outcome determination system is arranged determine whether the matter is specific matter based on the information indicative of at least a portion of a shape of at least some of the matter and based on the information indicative of a spectral intensity distribution.

Various implementations determine a pupil characteristic (e.g., perimeter location, pupil shape, pupil diameter, pupil center, etc.) using on-axis illumination. On-axis illumination involves producing light from a light source that is approximately on-axis with an image sensor configured to capture reflections of the light from the light source off the eye. The light from the light source may passes through the pupil into the eye and reflect off the retina to produce a bright pupil-type light pattern in data obtained by the image sensor. The light may be pulsed at a frequency so that frequency segmentation may be used to distinguish reflections through the pupil off the retina from reflections of light from other light sources. In some implementations, the image sensor is an event camera that detects events. The pupil characteristics may be assessed by assessing events that recur in a given area at the given frequency.

A system includes one or more sets of reflective visual markers, a light source configured to emit light, and a controller communicatively coupled to the light source. Each set of reflective visual markers is coupled to a component of a welding system. Each reflective visual marker is configured to reflect the emitted light received from the light source towards one or more cameras. The controller is configured to control illumination settings of the light source based at least in part on a status of the welding system being utilized to perform a live-arc welding operation.