Methods and systems for depth sensing are provided. A system includes a first and second optical sensor each including a first plurality of photodetectors configured to capture visible light interspersed with a second plurality of photodetectors configured to capture infrared light within a particular infrared band. The system also includes a computing device configured to (i) identify first corresponding features of the environment between a first visible light image captured by the first optical sensor and a second visible light image captured by the second optical sensor; (ii) identify second corresponding features of the environment between a first infrared light image captured by the first optical sensor and a second infrared light image captured by the second optical sensor; and (iii) determine a depth estimate for at least one surface in the environment based on the first corresponding features and the second corresponding features.

An example automated locomotive spotting system includes a locomotive having a tractive effort mechanism for moving the locomotive along a track, and a locomotive controller configured to control the tractive effort mechanism to move the locomotive along the track. The locomotive controller includes an odometer configured to monitor a distance traversed by the locomotive along the track. The locomotive controller is configured to receive a requested spotting distance value, and initiate movement of the locomotive along the track via the tractive effort mechanism. The locomotive controller is also configured to monitor, by the odometer, the distance traversed by the locomotive along the track, and inhibit movement of the locomotive in response to the monitored odometer distance indicating the locomotive has traversed the requested spotting distance.

An electronic apparatus, comprises a projection unit configured to project an image, a measurement unit configured to measure a distance to an object, a projection control unit configured to control, based on the distance to the object measured by the measurement unit, projection of the image by the projection unit so that the image projected onto the object has a preliminarily set actual size length.

An intraoral measurement device includes a measurement optical system that includes: a laser light source; a time-of-flight (TOF) sensor; and a lens. The laser light source irradiates a measuring region including a measuring target with laser light that is intensity-modulated in synchronization with the TOF sensor. The lens condenses part of the light reflected by the measuring object onto the TOF sensor.

The invention relates to a system and a method for determining the color of teeth or tooth surfaces, wherein the system comprises a 2D or 3D camera and an attachment on said camera, which sets a geometry of a captured image in such a way that, compared to capturing an image without the attachment, the distance, spatial angle and orientation of tooth surfaces relative to the camera are restricted. The attachment according to the invention can in particular be fitted to the camera in a simple manner.

A system and method for measuring. The system has at least one rail with a downstream end and an upstream end. There is a deflector at a downstream end which is used in conjunction with a measurement laser which is coupled to a shuttle. The shuttle is moveable relative to the rail. The shuttle also has a sight for zeroing in on the item to be measured.

A computing device includes: a three-dimensional (3D) sensor configured to capture point cloud data from a field of view (FOV); an auxiliary sensor configured to capture reference depth measurements corresponding to a surface within the FOV; a controller connected with the 3D sensor and the auxiliary sensor, the controller configured to: detect a reference depth capture condition; when the reference depth capture condition satisfies a quality criterion, control the auxiliary sensor to capture a reference depth corresponding to the surface within the FOV; and initiate, based on the captured reference depth, generation of corrective data for use at the 3D sensor to capture the point cloud data.

A projection pattern is projected onto a surface of an object from a projection point of a distance by projecting a plurality of beams of light from the projection point. The plurality of beams of light creates a plurality of projection artifacts that is arranged in a grid on the surface of the object. A center projection artifact lies at an intersection of a grid longitude line and a grid latitude line. A projection of the plurality of beams is adjusted so that the longitude line and/or the latitude line is rotated by a predetermined amount from an original position to a new position, resulting in an adjusted projection pattern on the surface of the object. An image of the object, including at least a portion of the adjusted projection pattern, is captured. A distance from the distance sensor to the object is calculated using information from the image.

The present invention relates to a virtual image distance measurement method, apparatus and device. The method includes: disposing a light blocking element, a lens element and an imaging element along the optical axis of the lens element in sequence, wherein a light transmitting portion is formed on the light blocking element, and the virtual image position of a measured near-eye display does not coincide with the imaging position of the lens element; presenting, by a virtual image of the measured near-eye display, multiple images on the imaging element after passing through the light blocking element and the lens element; and determining a distance measurement parameter based on the multiple images, and substituting the distance measurement parameter into a preset distance calculation formula to obtain a virtual image distance.

A method of generating a three-dimensional topological surface representation of a tyre on a vehicle, the method comprising: using a tread depth measurement device to record tread depth data for a tyre surface moving relative to the tread depth measurement device; generating a movement profile of the tyre surface; and using the movement profile of the tyre surface to map the tread depth data onto a base tyre structure, thereby generating a three-dimensional topological surface representation of the tyre.