Method, system, and non-transitory computer-readable recording medium for measuring ball spin

A system for measuring ball spin, the system comprising:

• a dimple detection management unit configured to detect a plurality of dimples in each of a plurality of images of a ball for which physical quantities are to be measured;
• and
• a physical quantity measurement unit configured to measure 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 dimple detection management unit is configured to:
• detect a position of a center of each of bright areas in each of the plurality of images;
• detect 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
• correct 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.