Automatic spin measurements for pitched Baseballs via consumer-grade high-speed cameras
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Controlling the spin of a ball is important in a va-
riety of sports, especially baseball. For an athlete to properly
train, it is necessary to know spin information immediately
after throwing or hitting a baseball. This paper presents a
fully automatic and marker-free technique to measure both
the spin rate and spin axis of a pitched baseball using a
consumer-grade high-speed camera. After tracking a ball
from the high-speed video, our technique measures spin rate
by detecting periods in which similar ball images appear,
and then estimates spin axis by performing rigid registration
that considers three-dimensional rotation. By separating the
spin rate measurement and spin axis estimation processes,
we achieve reasonable computational efficiency and robust-
ness for small blurred baseball images extracted from video.
We evaluated the accuracy of our presented technique by
using synthesized videos. To illustrate the feasibility of our
technique, we applied it to a variety of breaking ball pitches
captured under normal outdoor lighting conditions.
This page provides authors' archives. Visit Springer page
for the final publication.
Takashi Ijiri, Atsushi Nakamura, Akira Hirabayashi, Wataru Sakai, Takeshi Miyazaki, Ryutaro Himeno,
Automatic spin measurements for pitched Baseballs via consumer-grade high-speed cameras,
SIViP (2017). doi:10.1007/s11760-017-1075-x.
Springer publication version.
authors' prepring version
author ="Ijiri, Takashi and Nakamura, Atsushi and Hirabayashi, Akira
and Sakai, Wataru and Miyazaki, Takeshi and Himeno, Ryutaro",
title ="Automatic spin measurements for pitched Baseballs via consumer-grade high-speed cameras",
journal ="Signal, Image and Video Processing",
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