Systems and methods for measurement of 3D attributes using computer vision
A system including a computing device and camera is disclosed; the system configured for measuring three-dimensional attributes and associated performance measurements of a mechanical device. Some embodiments comprise a camera configured to capture images of the mechanical device and a computing device in communication with the camera. In some embodiments, the computing device is configured to access a first set of pixels associated with a first plurality of fiducials to calibrate a spatial resolution of the camera. A second image from the camera can be converted into a second set of pixels associated with each of the plurality of fiducials, which are attached to the mechanical device. The computing device can be further configured to compare the first and second set of pixels to determine the location of the plurality of fiducials on the mechanical device.
1 . A system for analyzing a golf swing, the system comprising:
a processor in operable communication with only a single camera, the processor configured for:
accessing one or more images of the golf swing captured by the single camera, the one or more images associated with a plurality of fiducials and capturing a same field of view;
generating a first set of coordinates corresponding to the plurality of fiducials and real features of a golf club;
inputting one or more swing analysis input values based on the first set of coordinates into a set of predetermined linear algebraic operations to obtain a center axis of the golf club and a plane parallel to a face of the golf club;
utilizing the center axis of the golf club and the plane parallel to the face of the golf club in a loft and lie calculation module to output a loft and a lie associated with the golf club; and
accessing a database of predetermined virtual objects to compare the loft and the lie against predetermined target specifications via a virtual objects superposition module; wherein the plurality of fiducials comprises:
a first fiducial aligned along a shaft of the golf club;
a second fiducial aligned along a head of the golf club; and
a third fiducial aligned along an arm, a shoulder, a leg, or a wrist of a user.
2 . The system of claim 1 , further comprising a smart watch equipped with one or more sensors.
3 . The system of claim 2 , wherein the one or more sensors are selected from the group consisting of an accelerometer, a gyroscope, and a magnetometer.
4 . The system of claim 3 , wherein the one or more sensors are configured to measure one or more characteristics of the golf swing.
5 . The system of claim 4 , wherein the one or more characteristics of the golf swing includes downswing time.
6 . The system of claim 4 , wherein the one or more characteristics of the golf swing includes tempo.
7 . The system of claim 1 , wherein the third fiducial is attached to a garment worn by the user.
8 . The system of claim 1 , wherein the first fiducial comprises a natural preselected feature of the golf club.
9 . The system of claim 1 , wherein the second fiducial comprises a natural preselected feature of the golf club.
10 . The system of claim 9 , wherein the second fiducial is defined along a bottom groove of the golf club.
11 . The system of claim 1 , wherein at least one of the plurality of fiducials comprises a set of 2D quick response (QR) codes.
12 . The system of claim 1 , wherein calibration of a spatial resolution of the single camera comprises:
providing a sheet, the plurality of fiducials defined as an array along a side of the sheet,
positioning the sheet in front of the single camera such that the side of the sheet is oriented towards a lens of the single camera, and
changing a position and orientation of the sheet relative to the single camera while capturing one or more images to generate calibration data,
wherein the calibration data is utilized by the processor to determine the first set of coordinates corresponding to the plurality of fiducials.
13 . The system of claim 12 , wherein the sheet is used as a reference to compute an initial pose of the single camera.
14 . The system of claim 1 , wherein the single camera is integrated with a computing device.
15 . The system of claim 1 , wherein the third fiducial is aligned along an arm of the user.
16 . The system of claim 1 , wherein the third fiducial is aligned along a leg of the user.
17 . The system of claim 1 , wherein the plurality of fiducials further comprises a fourth fiducial aligned along a body of the user.