A system and a method for spatial positioning of magnetometers. Said system includes: magnetometers, a magnetometer support, first positioning markers, a photogrammetry system, and a controller. The first positioning markers are a non-rotationally-symmetrical pattern. The photogrammetry system includes photographing devices configured to photograph, at at least two of a plurality of photographing sites, first image data of the first positioning markers by means of one or more photographing devices. The controller is configured to receive data of the first image photographed by the photographing devices, calculate spatial positions of the first positioning markers on the basis of pre-obtained system parameters and the first image data, and then calculate spatial positions and spatial orientations of the magnetometers.

Provided are a probe for a three-dimensional coordinate measuring device that enable calculation of coordinates of a measurement point of a measurement target with high accuracy. The probe is used in the three-dimensional coordinate measuring device that calculates coordinates of a measurement point of a measurement target. In the probe, a plurality of markers whose image is captured by an imaging unit are held by a probe holding unit. A stylus, which is brought into contact with the measurement target to specify the measurement point, is attached to the probe holding unit. The stylus has a predetermined positional relationship with respect to the plurality of measurement markers. The probe holding unit is connected to a probe casing in a freely movable manner. A magnetic sensor that outputs a signal corresponding to a displacement amount of the probe holding unit with respect to the probe casing is provided inside the probe casing.

A 3D object sensing system includes an object positioning unit, an object sensing unit, and an evaluation unit. The object positioning unit has a rotatable platform and a platform position sensing unit. The object sensing unit includes two individual sensing systems which each have a sensing area. A positioning unit defines a positional relation of the individual sensing systems to one another. The two individual sensing systems sense object data of object points of the 3D object and provide the object data the evaluation unit. The evaluation unit includes respective evaluation modules for each of the at least two individual sensing systems, an overall evaluation module and a generation module.

Devices, methods, and computer program products for measuring the speed of an object. A speed measuring device includes a rangefinder module configured to measure distances from the device to a target object. Activating the device causes the device to measure a first distance from the device to the object along a first line-of-sight, and a second distance from the device to the object along a second line-of-sight. The device determines an angular displacement between the first line-of-sight and the second line-of-sight, and one or more of an elapsed time between measuring the first distance and measuring the second distance and a radial velocity of the object. The device then determines the absolute speed of the object based on the first distance, the second distance, the angular displacement, and one or more of the elapsed time and radial velocity.

A method for locating at least one point of a real part on a virtual part defined in a first coordinate system by targeting the point of the real part with a pointer of an augmented-reality device. The method includes determining a transfer matrix for converting between a coordinate system in which the pointer moves and a coordinate system in which the virtual part corresponding to the real part is defined, and determining the coordinates in the first coordinate system of the point be located by converting, by virtue of the transfer matrix, the coordinates in the second coordinate system of the pointer pointed at the point to be located.

The invention provides a wavelength tracking system comprising a wavelength tracking unit and an interferometer system. The wavelength tracking unit has reflection surfaces at stabile positions providing a first reflection path with a first path length and a second reflection path with a second path length. The first path length is substantially larger than the second path length. The interferometer system comprises: a beam splitter to split a light beam in a first measurement beam and a second measurement beam; at least one optic element to guide the first measurement beam, at least partially, along the first reflection path and the second measurement beam, at least partially, along the second reflection path; a first light sensor arranged at an end of the first reflection path to receive the first measurement beam and to provide a first sensor signal on the basis of the first measurement beam; a second light sensor arranged at an end of the second reflection path to receive the second measurement beam and to provide a second sensor signal on the basis of the second measurement beam; and a processing unit to determine a wavelength or change in wavelength on the basis of the first sensor signal and the second sensor signal.

An acquisition equipment, a sound acquisition method, a sound source tracking system and a sound source tracking method are provided. The acquisition equipment includes an audio acquisition device, an image acquisition device, an information processing device and an angle control device. The audio acquisition device is configured to acquire the sound of a target object; the image acquisition device is configured to acquire an optical image including an acquisition object; the information processing device is configured to process the optical image to determine position information of the target object; and the angle control device is configured to receive the position information of the target object sent by the information processing device, and control the sound pick-up angle of the audio acquisition device according to the position information of the target object.

The present invention relates to a method and a system for three-dimensional automatic scan based primitive, and estimates a three-dimensional model of an object from three-dimensional scan data of the object, recognizes a shape of the three-dimensional model by using fitting with at least one primitive, evaluates confidence of each of surface points of the three-dimensional model based on similarity between the at least one primitive used for shape recognition and the shape of the three-dimensional model, and scans the object in a series of views determined based on the confidence of each of the surface points, and thus, accuracy of the three-dimensional scan of the object is improved and time required for scan may be reduced.

A multi-mode three-dimensional scanning method includes: obtaining intrinsic parameters and extrinsic parameters of a calibrated camera in different scanning modes, and upon switching between the different scanning modes, triggering a change of parameters of the camera to the intrinsic parameters and the extrinsic parameters in a corresponding scanning mode; and a user selecting to execute a laser-based scanning mode, a speckle-based scanning mode or a transition scanning mode according to a scanning requirement. In the continual fusion and conversion during the whole scanning process, the speckle reconstruction and the laser line reconstruction are unified to the same coordinate system, and the surface point cloud of the object being scanned is output. The present disclosure also provides a multi-mode three-dimensional scanning system.

The disclosure provides an improvement to digital fringe projection techniques in which the optimal focal length settings are automatically determined for reconstructing a 3D profile. In a pre-calibration phase, geometric parameters of the system are calibrated using a few discrete focal length settings. These discretely calibrated geometric parameters are fitted onto a continuous function model. In a 3D autofocusing phase, a set of optimal focal length settings for a scene are determined using a 2D autofocusing technique. Calibrated geometric parameters for each optimal focal length setting are automatically calculated using the continuous geometric parameter model. Finally, a 3D profile of objects in the scene is reconstructed using the calibrated geometric parameters for each optimal focal length setting.