US 12,478,849 B2
Device and method for sensing movement of sphere moving on plane surface using camera, and device and method for sensing golf ball moving on putting mat
Soo Ho Chang, Seoul (KR); Yeong Kwang Park, Seoul (KR); Jae Hong Kim, Seoul (KR); and Tae Suk Ko, Seoul (KR)
Assigned to GOLFZON CO., LTD., Seoul (KR)
Appl. No. 18/030,765
Filed by GOLFZON CO., LTD., Seoul (KR)
PCT Filed Oct. 5, 2021, PCT No. PCT/KR2021/013602
§ 371(c)(1), (2) Date Apr. 6, 2023,
PCT Pub. No. WO2022/075691, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 10-2020-0129422 (KR), filed on Oct. 7, 2020.
Prior Publication US 2023/0405432 A1, Dec. 21, 2023
Int. Cl. A63B 69/36 (2006.01); A63B 24/00 (2006.01)
CPC A63B 69/3658 (2013.01) [A63B 24/0021 (2013.01); A63B 2024/0028 (2013.01); A63B 2220/10 (2013.01); A63B 2220/806 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A device for sensing a sphere moving on a plane, comprising:
a single camera that acquires an image at an angle of view including the plane on which the sphere moves in a single view at an arbitrary position; and
a sensing processor that is configured to:
set a position relationship between the single camera and a reference surface that is the plane on which the sphere moves from the image acquired by the single camera,
detect an object corresponding to the sphere on the acquired image,
detect an upper boundary of object detected in the image,
detect a top point on the upper boundary of the object,
create a detection figure that matches a size and a shape of the object and detect a bottom point of the object corresponding to the top point, using a size of the detection figure,
determine a position coordinate of a point where a center point of the sphere is projected vertically to the reference surface as a coordinate of a position of the sphere on the reference surface, using information on the set position relationship and the detected top or bottom point of the object, and
determine information on movement of the sphere from changes of the coordinate of the position of the sphere on the reference surface.