摘要:
A bandpass optical filter comprises a broadband optical diffuser and a narrowband anti-diffuser disposed in a common optical path with the broadband optical diffuser.
摘要:
Machine learning is applied to both 2D images from an infrared imager imaging laser reflections from an object and to the 3D depth map of the object that is generated using the 2D images and time of flight (TOF) information. In this way, the 3D depth map accuracy can be improved without increasing laser power or using high resolution imagers.
摘要:
An exemplary depth capture system (system) emits, from a first fixed position with respect to a real-world scene and within a first frequency band, a first structured light pattern onto surfaces of objects included in a real-world scene. The system also emits, from a second fixed position with respect to the real-world scene and within a second frequency band, a second structured light pattern onto the surfaces of the objects. The system detects the first and second structured light patterns using one or more optical sensors by way of first and second optical filters, respectively. The first and second optical filters are each configured to only pass one of the structured light patterns and to block the other. Based on the detection of the structured light patterns, the system generates depth data representative of the surfaces of the objects included in the real-world scene.
摘要:
Scanning apparatus (20, 80) includes a base (22, 82) and a gimbal (52), including a shaft (56) that fits into rotational bearings (58) in the base and is configured to rotate through 360O about a gimbal axis relative to the base. A mirror assembly (60), fixed to the gimbal, includes a mirror (50), which is positioned on the gimbal axis and is configured to rotate about a mirror axis perpendicular to the gimbal axis. A transmitter (40) directs pulses of optical radiation toward the mirror, which directs the optical radiation toward a scene. A receiver (66) receives, via the mirror, the optical radiation reflected from the scene and outputs signals in response to the received radiation. Control circuitry (34) drives the gimbal to rotate about the gimbal axis and the mirror to rotate about the mirror axis, and processes the signals output by the receiver in order to generate a three-dimensional map of the scanned area.
摘要:
A method for detecting decalibration of a depth camera system including a first, second, and third cameras having overlapping fields of view in a direction includes: detecting a feature in a first image captured by the first camera; detecting the feature in a second image captured by the second camera; detecting the feature in a third image captured by the third camera, the third camera being non-collinear with the first and second cameras; identifying a first conjugate epipolar line in the second image in accordance with a detected location of the feature in the first image and calibration parameters; identifying a second conjugate epipolar line in the second image in accordance with a detected location of the feature in the third image and the calibration parameters; and calculating a difference between a detected location of the feature in the second image and the first and second conjugate epipolar lines.
摘要:
A method for applying power in a plurality of pulses to the projection source to control the projection source to emit coherent light during an exposure interval comprising at least two sub-intervals, the applied power causing the projection source to have different temperatures during first and second sub-intervals of the at least two sub-intervals; and emitting light from the projection source, wherein the projection source emits light having different wavelengths during the first and second sub-intervals in accordance with the different temperatures of the projection source.
摘要:
A system includes a first scanner having an inflatable membrane configured to be inflated with a medium to conform an exterior surface of the inflatable membrane to an interior shape of a cavity. The medium attenuates, at first rate per unit length, light having a first optical wavelength, and attenuates, at a second rate per unit length, light having a second optical wavelength. An emitter is configured to generate light to illuminate the interior surface and a detector is configured to receive light from the interior surface. The scanner further includes a processor configured to generate a first electronic representation of the interior shape based on the light. A design computer is configured to modify the first electronic representation into a three-dimensional shape corresponding to at least a portion of the interior shape and a fabricator configured to fabricate, based at least on the modified first electronic representation, an earbud.
摘要:
Die Erfindung betrifft ein Verfahren zur Aufnahme eines dreidimensionalen Abbilds einer, insbesondere statischen, Szene (3) mit - einer Vielzahl von Bildaufnahmeeinheiten (21, 22) mit gemeinsamem überlappendem Aufnahmebereich (200), sowie - einer Beleuchtungsanordnung, mit der eine Vielzahl von unterschiedlichen Lichtkonfigurationen zur Beleuchtung des gemeinsamen Aufnahmebereichs der Bildaufnahmeeinheiten (21, 22) erstellbar ist, - wobei mit jeder der Bildaufnahmeeinheiten (21, 22) jeweils zumindest ein Bild (411, 412, 413, 421, 422, 423) des gemeinsamen Aufnahmebereichs (200) für jeweils eine Anzahl der Lichtkonfigurationen erstellt wird, - wobei für jede Bildaufnahmeeinheit (21, 22) jeweils ein, gegebenenfalls mehrkanaliges, Merkmalsbild (51, 52) erstellt wird, indem die von dieser Bildaufnahmeeinheit (21, 22) erstellten Bilder (411, 412, 413; 421, 422, 423) nach einer vorgegebenen Funktion kombiniert werden, - wobei durch Korrespondenzanalyse für eine Anzahl von Referenzpunkten (611, 612, 613, 614), insbesondere für Punkte des überlappenden Aufnahmebereichs, in einem der Merkmalsbilder (51) jeweils der lageentsprechende Punkt (621, 622, 623, 624) in zumindest einem anderen Merkmalbild (52) ermittelt wird, und - wobei aufgrund der Disparität zwischen den miteinander korrespondierenden Punkte (611, 612, 613, 614; 621, 622, 623, 624) in den einzelnen Merkmalsbildern (51, 52) die dreidimensionale Lage des in den Punkten (611, 612, 613, 614; 621, 622, 623, 624) abgebildeten Raumpunkts ermittelt wird.
摘要:
Technologies are generally described for calibrating three-dimensional image sensors. In some examples, an imaging system may include a sensor for detecting two-dimensional image data associated with a scene and a sensor for detecting depth data associated with the scene. Both sensors may also be configured to detect a reference signal used to illuminate the scene. The imaging system may then be configured to form three-dimensional data about the scene by using the reference signal to combine the two-dimensional image data and the depth data.
摘要:
Method for the video inspection of a pantograph (100) along an overhead contact line, comprising the steps of: detecting passage of the pantograph (100) in a plurality of monitoring stations (2); in each monitoring station (2), in response to the detection of the passage of the pantograph (100), illuminating a first overhead zone in which a portion of the pantograph (100) passes; in each monitoring station (2), during the step of illuminating the first overhead zone, acquiring images of the first overhead zone by means of at least one pair of stereo video cameras (5a, 5b); calculating the disparity between the images acquired; reconstructing a three-dimensional model of the portion of the pantograph (100).