摘要:
Streifenprojektionsverfahren zum Bestimmen der Topographie eines Körpers (12), mit den Schritten: Projizieren einer Folge von Sätzen von Mustern (T i ) auf die Oberfläche (20) des Körpers (12), wobei jeder Satz zumindest zwei Muster (Ti) aufweist und wobei jedes Muster (T i ) S Streifen hat, für jedes Muster (T i ) Aufnehmen eines Bildes (24.i) der Oberfläche (20) mit aufprojiziertem Muster, sodass eine Folge von Aufnahmen entsteht, und Berechnen der Topographie aus den Bildern (24.i), wobei solche Muster projiziert werden, bei denen jeder Streifen einen Intensitätsverlauf senkrecht zur Streifen-Längsrichtung (L) aufweist und jeder Intensitätsverlauf durch eine Funktion (Q) beschreibbar ist, die eine räumliche Phasenlage (ß) hat. Erfindungsgemäß ist vorgesehen, dass die Phasenlage (ß) sich in Abhängigkeit von einem Code (g (s) ) der Ordinalzahl (s) des Streifens ändert.
摘要:
A method used in a welding system includes detecting multiple markers on a welding torch. The markers are detected using one or more cameras. The method also includes blocking live welding using the welding torch while the one or more cameras are unable to detect at least one of the multiple markers on the welding torch.
摘要:
One or more imaging device(s) inside a car that look(s) at occupants (driver, front passenger, rear passengers) and cover(s) multiple security, comfort, driver assistance and occupant state related functions, wherein the imaging device includes an illumination in the near infrared. An imaging device inside the car that can measure occupants' vital signs (heart rate, respiration rate, blood oxygen saturation) using contactless imaging photoplethysmography.
摘要:
The present invention relates to a laser device (10) for projecting a structured light pattern (9) onto a scene (15). The device is formed of several arrays (1) of semiconductor lasers (2), each array (1) comprising an irregular distribution of emission areas (2a) of the semiconductor lasers (2). One or several imaging optics (4) image said arrays (1) to an imaging space and superpose the images of said arrays (1) in the imaging space to form said light pattern (9). The proposed laser device generates a light pattern with high contrast and efficiency which may be used for 3D imaging systems, e. g. in automotive applications.
摘要:
An apparatus (130) and method for automatically or semi-automatically controlling a collimator (COL) of an x-ray imager (100) to collimate imager (100)'s x-ray beam and adjusting an alignment of the x-ray imager (100) in respect of an object (PAT).The collimation and alignment operation is based on 3D image data (3DI) of the object (PAT)to be imaged. The 3D image data (3DI) is acquired by a sensor (S). The sensor (S) operates on non-ionizing radiation. The 3D image data (3DI) describes a shape in 3D of the object (PAT) and anatomic landmarks are derived therefrom to define a collimation window (W) for a region of interest(ROI). Based on the collimation window (W) the collimator (COL)'s setting and imager (100) alignment is adjusted accordingly.
摘要:
A portable instrument for 3D surface metrology projects augmented-reality feedback directly on the measured target surface. The instrument generates structured-light measuring-patterns and projects them successively on a target surface. Features, contours, and textures of the target surface distort each projected measuring-pattern image (MPI) from the original measuring-pattern. The instrument photographs each MPI, extracts measurement data from the detected distortions, and derives a result-image from selected aspects of the measurement data. The instrument warps the result-image to compensate for distortions from the projector or surface and projects the result-image on the measured surface, optionally with other information such as summaries, instrument status, menus, and instructions. The instrument is lightweight and rugged. Accurate measurements with hand-held embodiments are made possible by high measurement speed and an optional built-in inertial measurement unit to correct for pose and motion effects. Gesture control may be used to improve user interaction with the portable metrology instrument.
摘要:
A method for generating codes for a code mask is provided. A plurality of symbols may be arranged into an n1 by n2 symbol structure, where n1 and n2 are integer values. A plurality of codewords may be defined from different overlapping k1 by k2 windows within the symbol structure, wherein co-linear and spatially overlapping windows define unique codewords, and the codewords are unique in a first direction of the symbol structure but are repeated in a second direction that is perpendicular to the first direction. A plurality of the symbol structures as a code mask, wherein symbols in two adjacent k1 by k2 windows are selected so as to avoid codeword aliasing of codewords in the two adjacent k1 by k2 windows.
摘要:
A method operational on a transmitter device is provided for projecting a composite code mask. A composite code mask on a tangible medium is obtained, where the composite code mask includes a code layer combined with a carrier layer. The code layer may include uniquely identifiable spatially-coded codewords defined by a plurality of symbols. The carrier layer may be independently ascertainable and distinct from the code layer and includes a plurality of reference objects that are robust to distortion upon projection. At least one of the code layer and carrier layer may be pre-shaped by a synthetic point spread function prior to projection. At least a portion of the composite code mask is projected, by the transmitter device, onto a target object to help a receiver ascertain depth information for the target object with a single projection of the composite code mask.