US 12,008,770 B2
Method, system, and non-transitory computer-readable recording medium for measuring ball spin
Yong Ho Suk, Seongnam-si (KR); Jey Ho Suk, Seoul (KR); and Hyeon Seok Choi, Seoul (KR)
Assigned to CREATZ Inc., Suwon-si (KR)
Filed by CREATZ INC., Suwon-si (KR)
Filed on Mar. 17, 2021, as Appl. No. 17/204,310.
Application 17/204,310 is a continuation of application No. PCT/KR2021/000420, filed on Jan. 12, 2021.
Claims priority of application No. 10-2020-0006247 (KR), filed on Jan. 16, 2020; and application No. 10-2020-0143813 (KR), filed on Oct. 30, 2020.
Prior Publication US 2021/0220701 A1, Jul. 22, 2021
Int. Cl. G06F 18/2113 (2023.01); A63B 24/00 (2006.01); G06T 7/246 (2017.01); G06V 10/24 (2022.01); G06V 10/75 (2022.01); G06V 20/00 (2022.01)
CPC G06T 7/246 (2017.01) [A63B 24/0006 (2013.01); G06F 18/2113 (2023.01); G06V 10/242 (2022.01); G06V 10/751 (2022.01); G06V 20/00 (2022.01); A63B 2220/806 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for measuring ball spin, the method comprising the steps of:
detecting a plurality of dimples in each of a plurality of images of a ball for which physical quantities are to be measured; and
measuring physical quantities related to spin of the ball with reference to a relationship between properties of the plurality of dimples detected in a first image among the plurality of images and properties of the plurality of dimples detected in a second image among the plurality of images,
wherein the detecting step comprises the steps of:
detecting a position of a center of each of bright areas in each of the plurality of images;
detecting a position of each of the plurality of dimples on the basis of the position of the center of each of the bright areas in each of the plurality of images; and
correcting the position of each of the plurality of dimples with reference to a direction in which light is applied to the ball in each of the plurality of images.