A particle detection method detects presence and location of particles on a target using measured signals from a plurality of structured illumination patterns. The particle detection method uses measured signals obtained by illuminating the target with structured illumination patterns to detect particles. Specifically, the degree of variation in these measured signals in raw images is calculated to determine whether a particle is present on the target at a particular area of interest.

A method for detecting a biometric information includes providing a biometric sensor including a base substrate, a light emitting layer and a touch detection layer on the base substrate, an encapsulating cover on a side of the light emitting layer away from the base substrate, and a photo-sensing layer between the light emitting layer and the base substrate; determining a touch position of a touch by a touch sensing circuit; determining a scanning region based on the touch position; controlling the light emitting layer to form a scanning light source to scan the scanning region in a scanning pattern, the scanning region encompassing the touch position; determining a light intensity distribution of a reflected light reflected by the surface of the biometric sensor in touch with the skin of the user based on signals from the plurality of photosensors; and determining the biometric information based on the light intensity distribution.

A portable detection system comprises an energy source configured to transmit energy, a retroreflective article, a detector configured to sense retroreflective energy produced by interaction of the energy transmitted from the source and the retroreflective article, and an indicator that indicates the detection of the retroreflective energy, wherein at least one of the energy source and the detector are configured to be worn by a user.

A structured light assurance system for a head tracking system is disclosed. In embodiments, the structured lighting system includes structured light projectors mountable in an aircraft cockpit or other mobile platform, the projectors oriented toward a pilot or operator of the mobile platform for capturing three-dimensional (3D) imagery of the pilot (e.g., via offset imaging sensors) and determining from the captured 3D imagery a position and orientation (pose) of the pilot's head relative to the mobile platform and independent of the main headtracking system. The structured lighting system verifies the determined head pose (and may also self-calibrate) by identifying within the captured imagery static fiducial markers fixed to the cockpit in known locations. The structured lighting system forwards the determined head pose to the main headtracker for drift correction or initial head pose updating by the latter system.

The present disclosure analyzes the image around the main body, detects the depth of the floor surface and the height of the floor surface beyond the obstacle, and determines whether to climb the obstacle.

A device for detecting a position and an orientation of a target object includes a detector, a selector, and a position and orientation determination module. The detector detects a feature region from a two-dimensional image obtained by imaging a target object, the feature region being included in a surface element constituting a surface of the target object. The selector selects data of three or more points from three-dimensional point cloud data obtained by three-dimensionally measuring the target object, the data of the three or more points being associated with the feature region. The position and orientation determination module determines position and orientation information by using the data of the three or more points and prior information regarding a shape of the surface element, the position and orientation information being related to a position and an orientation of the surface element.

A device for detecting a position and an orientation of a target object includes a detector, a selector, and a position and orientation determination module. The detector detects a feature region from a two-dimensional image obtained by imaging a target object, the feature region being included in a surface element constituting a surface of the target object. The selector selects data of three or more points from three-dimensional point cloud data obtained by three-dimensionally measuring the target object, the data of the three or more points being associated with the feature region. The position and orientation determination module determines position and orientation information by using the data of the three or more points and prior information regarding a shape of the surface element, the position and orientation information being related to a position and an orientation of the surface element.

A biometric identification system and a method for biometric authentication are described. A biometric authentication system includes at least one light source comprising at least one of a vertical surface emitting laser (VCSEL) or a VCSEL array configured to provide an illumination beam when the biometric authentication system is turned on. The system also includes an optical element configured to broaden the illumination beam and direct the illumination beam towards the portion of the object so as to generate at least one corresponding image response. The system also includes an image sensing unit configured to receive the at least one corresponding image response, capture a speckle pattern in the image response and form at least one of a computer readable image or data representing a speckle contrast in the speckle pattern.

A biometric identification system and a method for biometric authentication are described. A biometric authentication system includes at least one light source comprising at least one of a vertical surface emitting laser (VCSEL) or a VCSEL array configured to provide an illumination beam when the biometric authentication system is turned on. The system also includes an optical element configured to broaden the illumination beam and direct the illumination beam towards the portion of the object so as to generate at least one corresponding image response. The system also includes an image sensing unit configured to receive the at least one corresponding image response, capture a speckle pattern in the image response and form at least one of a computer readable image or data representing a speckle contrast in the speckle pattern.

The present disclosure provides a detection method of a projector, a projector, and an electronic device. The method includes: obtaining a speckle pattern, the speckle pattern being an image generated by irradiating laser light generated by a light source in the projector onto an object by an optical element; and performing an abnormality detection on the projector according to the speckle pattern.