Methods and systems for generating free viewpoint videos (FVVs) based on images captured in a sports arena. A method includes projecting, onto objects within a filming area within the sports arena, a predefined pattern including a large set of features; generating, based on signals captured by each of a plurality of depth cameras, a point cloud for each depth camera, wherein the plurality of depth cameras is deployed in proximity to the filming area, wherein the captured signals are reflected off of the objects within the filming area; creating, based on the plurality of point clouds, a unified point cloud; meshing points in the unified point cloud to generate a three-dimensional (3D) model of the objects; texturing the 3D model based on images captured by the plurality of depth cameras; and rendering the textured 3D model as a FVV including a series of video frames with respect to a viewpoint.

Methods and systems for generating free viewpoint videos (FVVs) based on images captured in a sports arena. A method includes projecting, onto objects within a filming area within the sports arena, a predefined pattern including a large set of features; generating, based on signals captured by each of a plurality of depth cameras, a point cloud for each depth camera, wherein the plurality of depth cameras is deployed in proximity to the filming area, wherein the captured signals are reflected off of the objects within the filming area; creating, based on the plurality of point clouds, a unified point cloud; meshing points in the unified point cloud to generate a three-dimensional (3D) model of the objects; texturing the 3D model based on images captured by the plurality of depth cameras; and rendering the textured 3D model as a FVV including a series of video frames with respect to a viewpoint.

A method for measuring interfaces of an optical element, forming part of a plurality of similar elements including at least one reference optical element, the method implemented by a device, the method including: relative positioning of each reference optical element and the measurement beam, to allow a measurement of interfaces of each reference optical element; acquisition of a reference image, of each reference element; positioning of the measured optical element to allow acquisition of a measurement image, of the optical element to be measured; determining a difference of position in a field of view of the measured element with respect to each reference optical element, based on the reference and measurement images; adjusting the position of the measured optical element in the field of view to cancel the difference of position; and measuring the interfaces of the measured optical element by the measurement beam.

A correction value measurement method includes, measuring a position of a reference sphere, calculating a relative position of the reference sphere with respect to a sensing position from the position of the reference sphere, a length of the position measurement sensor, and a length of the reference tool. The method further includes acquiring a reference tool position as a distal end position of the reference tool using, calculating a length direction correction value of the position measurement sensor from the reference tool position, the position of the reference sphere, the relative position, and a length of the reference tool, and measuring the position of the reference sphere to calculate a radial direction correction value of the position measurement sensor.

It is an object of the present invention to provide a position measuring system, a position measuring device, and a method for measuring a position that can accurately measure the position of an object to be measured without being limited by an environment or an optical axis.

A position measuring device 20 according to the present invention is characterized by including a light receiving unit 21 configured to receive scattered light Lsc emitted from a side surface of an optical fiber 50, a database 22 configured to store a correspondence between information on the scattered light and a position of the object to be measured, and a determination unit 23 configured to determine, based on the correspondence stored in the database, a position of the object to be measured from information on the scattered light received by the light receiving unit.

Optical assembly comprising a variable focal length lens assembly comprising a variable focal length lens and an actuating unit, wherein an energy absorption rate of energy absorbed by the variable focal length lens assembly depends on the applied controlling signal. The optical assembly comprises a controlling unit configured to control focal length settings of the variable focal length lens by providing respective controlling signals and to apply a default controlling signal for providing a default focal length and default energy absorption rate. The controlling unit provides a thermal stabilisation functionality, the thermal stabilisation functionality is defined by applying a varying controlling signal related to a varying focal length and applying a compensation controlling signal related to a compensating focal length.

A system for inspecting each workpiece of a plurality of non-identical workpieces, each workpiece having a distinct workholding specification. The system includes a workholder configured to autonomously execute a plurality of workholding operations pursuant to parameters of a specified pre-defined workholding mode specified from a plurality of distinct, pre-defined workholding modes. Each pre-defined workholding mode specifies a plurality of holding parameters corresponding to the holding specification of a corresponding workpiece.

A drop placement analyzer for an inkjet printer is described herein. The drop placement analyzer comprises a film support that has an opaque, optically non-interfering vacuum surface for immobilizing a film against the optically non-interfering vacuum surface and photographing drops disposed on the film from the same side of the film on which the drops are disposed.

An imaging device outputs time series images that include multiple captured images that capture over time the surface of the object to be measured. On the optical path extending from the object to be measured, through a lens equipped on the imaging device and up to the imaging surface, the optical path bending member is interposed in a part of the optical path between the object to be measured and a lens. The optical path bending member bends the light traveling from the lens to the imaging surface so as to tilt the light in a direction such that the direction of travel thereof approaches the optical axis of the lens. This abnormality determination device utilizes the in-plane displacement and out-of-plane displacement calculated from the time series images to determine abnormalities in the measured object.

A method provides distance calibration data for a chromatic range sensor system with a chromatic range sensor optical pen configured to focus different wavelengths at different distances along a distance measurement axis. The chromatic range sensor optical pen is arranged in a relationship relative to a spherical calibration object that has a nominally spherical calibration surface. Relative movement of the chromatic range sensor optical pen in relation to the nominally spherical calibration surface is controlled so as to perform a spiral scan of a portion of the nominally spherical calibration surface. Distance indicating data is determined as corresponding to the distances between the chromatic range sensor optical pen and surface points on the nominally spherical calibration surface as the spiral scan is performed. Distance calibration data for the chromatic range sensor system is determined based on the distance indicating data.