Topgolf Sweden AB

A camera and a sensor unit for mounting in the camera are disclosed. The sensor unit comprises a housing arranged to partially enclose an optical filter assembly. The optical filter assembly comprises a mount configured to receive and support an optical filter, and a sensor gasket arranged between the optical filter and an image sensor arrangement. The image sensor arrangement and the sensor gasket cooperate to fixate the optical filter relatively the mount. The optical filter assembly comprises a first heat conducting gasket arranged between the mount and the image sensor arrangement. The housing comprises a second heat conducting gasket arranged between the housing and the mount.

Methods and apparatus, including computer program products, implementing, and using techniques for determining a spin axis of a ball in flight. At least a portion of an observed trajectory of the ball is obtained. The trajectory includes three-dimensional locations of the ball over time, as determined from individual observations of the ball by one or more sensors. A point in three-dimensional space is selected. An optimization problem is solved, wherein the three-dimensional acceleration at the selected point is used as an optimization target, and a spin axis, a spin magnitude and a wind vector are used as optimization parameters, and wherein the solution to the optimization problem is a combination of optimization parameter values. The spin axis determined in the solution to the optimization problem is selected as the spin axis for the ball. The spin axis is used to generate ball trajectory information for presentation on an output device.

Methods (and apparatuses) for providing blobs include capturing, by the tracking sensor, a tracking stream, which comprises tracking image frames, and assigning, by the capturing subsystem, each last blob of the set of last blobs to one or more traces to obtain a set of traces, and generating, by the capturing subsystem, a respective score for each trace of the set of traces based on one or more of a start location of said each trace, an initial straightness of said each trace, an acceleration of said each trace, a direction of said each trace, a gradually decreasing size of blobs assigned to said each trace, a length of said each trace, a blob count of said each trace, or a combination thereof.

Method for tracking an object moving through a three-dimensional space within a field of view of a digital camera, includes: obtaining from a radar directional information regarding the object and from the digital camera a series of consecutively captured images; determining a region of interest corresponding to a location in the consecutively captured images of the object; and determining if a pixel is a blob candidates based on region of interest and form correlating blobs across the images to determine a trajectory. The determining blob candidates is performed based on the region of interest by determining of what pixels are blob candidates as a function of the region of interest.

Method for tracking an object moving through a three-dimensional space within a field of view of a digital camera, includes: obtaining from a radar directional, radial distance and/or speed information regarding a hypothetical moving objects; determining, based on the information and without taking into consideration information from the digital camera, two hypothetical three-dimensional radar-based trajectories that are transformed into image plane coordinates hypothetical two-dimensional radar-based trajectories; obtaining a series of images of the three-dimensional space, that are analyzed to detect a two-dimensional camera-based trajectory; mapping, in the image plane coordinates, the two-dimensional camera-based trajectory to one of the hypothetical two-dimensional radar-based trajectories; and determining a three-dimensional trajectory based on the two-dimensional camera-based trajectory in combination with hypothetical two-dimensional radar-based trajectory, but without considering directional information associated with the mapped hypothetical two-dimensional radar-based trajectory.

A method and a tracking managing subsystem ( 111 ) for providing blobs relating to tracking of a sports projectile are disclosed. The method comprises obtaining (A 110 ), from the tracking assembly ( 115 ), a tracking stream including tracking data maps, which are associated with timestamps, wherein each tracking data map of the tracking data maps is associated with a respective timestamp of the timestamps, and obtaining (A 120 ) a set of transform parameters. Furthermore, the method comprises deriving (A 130 ) a set of blobs by applying a blob detection procedure to at least two tracking data maps of the tracking stream, and sending (A 140 ) the set of blobs and the set of transform parameters.

A system and method for enabling management of faults relating to a tracking managing subsystem and a tracking assembly communicatively connected thereto, include a method including: obtaining from the tracking assembly a tracking stream, which comprises tracking data maps, obtaining a set of system parameters, deriving a set of blobs by applying a blob detection procedure to at least two tracking data maps of the tracking stream, and sending the set of blobs and the set of system parameters to a rendering subsystem at which the set of system parameters are processed, thereby enabling fault management by the rendering subsystem.

Method for tracking an object moving through a three-dimensional space within a field of view of a camera, includes: obtaining from a radar directional information regarding a hypothetical moving objects and determining a hypothetical radar-based trajectory; obtaining from the camera a series of consecutively captured images and identifying a hypothetical camera-based object trajectory; correlating the hypothetical camera-based trajectory to the hypothetical radar-based trajectory; determining the object trajectory as a hypothetical three-dimensional trajectories based on the hypothetical camera-based trajectory and the hypothetical radar-based trajectory. The method further includes feeding back information relating to the three-dimensional trajectory to alter the results of analyzing of the images.

Methods and apparatus for determining spin of a golf ball in flight. At least a portion of an observed trajectory of the golf ball and one or more parameters associated with the trajectory are obtained. The parameters are selected from launch angle, ball speed, club speed and ball carry. Two or more spin candidates are obtained for the golf ball. Each spin candidate has an associated probability. A most probable used golf club for launching the golf ball into the observed trajectory is determined by matching the observed parameters with parameters for two or more different golf clubs. Ball spin probability data are obtained for the most probable used golf club. The spin of the golf ball is the most probable spin candidate, based on the ball spin probability data and the observed trajectory. The determined spin of the golf ball is displayed on a display device.

A system, a method and a calibration apparatus determine a first transformation between a first coordinate system of a first camera and a second coordinate system of a second camera by use of a third camera. The third camera captures first and second markers in its field of view. The calibration apparatus iteratively determines updated orientation components of a third transformation, between the first and third cameras. In a similar manner, the calibration apparatus iteratively determines updated orientation and translation components for a second transformation, between the first and second cameras. Furthermore, the calibration apparatus iteratively determines at least updated orientation components for the first transformation.