  During the training for snowboard big air, one of the most popular winter
sports, athletes and coaches extensively shoot and check their jump attempts
using a single camera or smartphone. However, by watching videos sequentially,
it is difficult to compare the precise difference in performance between two
trials. Therefore, side-by-side display or overlay of two videos may be helpful
for training. To accomplish this, the spatial and temporal alignment of
multiple performances must be ensured. In this study, we propose a conventional
but plausible solution using the existing image processing techniques for
snowboard big air training. We conducted interviews with expert snowboarders
who stated that the spatiotemporally aligned videos enabled them to precisely
identify slight differences in body movements. The results suggest that the
proposed method can be used during the training of snowboard big air.
