BallCam360: 360-degree Video Stabilization for a Spinning Ball Camera

• We propose a ball camera with an omnidirectional camera and its image processing algorithm to fix the point of view (POV) for spectating of ball sports. Our ball camera embeds the omnidirectional camera at its center and encloses it with two acrylic domes. The problem of an omnidirectional video taken with this ball camera is that the POV is unstable since the camera pose changes as the ball rotations. In this paper we propose an algorithm to generate a POV-fixed omnidirectional video by estimating the change of camera pose by feature matching and applying the pose modification process to each frame. Practically we were able to generate POV-fixed omnidirectional videos even if the ball rotated.

Papers:

• Masakazu Nakazawa, Hideki Koike: Synthesizing Fixed Point of Views for Omnidirectional Camera Ball, Transaction on Virtual Reality Society of Japan, Vol.22, No.4, pp.485-491, 2017. in Japanese. (PDF)
• Masakazu Nakazawa, Hideki Koike: Synthesizing Fixed Point of Views from a Spinning Omnidirectional Ball Camera, In Proceedings of the 8th Augmented Human International Conference (AH '17). ACM, New York, NY, USA, , Article 32 , 5 pages, 2017. (PDF)
• Masakazu Nakazawa, Hideki Koike: Synthesizing Fixed Point of Views from a Spinning Omnidirectional Ball Camera, Workshop on Interactive Software and Systems (WISS 2016). in Japanese.