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Title
Proceedings International Workshop on Mobile Mapping Technology
Author
Li, Rongxing

Dynamic Analysis of Human Motion using Digital Video Camera
mounted on Video Theodolite
Tetsuji ANAI*, Hirofumi CHIKATSU*
* Department of Civil Engineering
Tokyo Denki University
Japan.
E-mail: anai@g.dendai.ac.jp
Commission V, Working Group IC V/III
KEY WORDS: Real-time Imaging, Digital Video Camera, Video Theodolite, Sequential Image, Human Motion Analysis
ABSTRACT
Generally, dynamic analysis of human motion has been performed using video camera under a condition that camera position and
rotation are fixed and some markers are fitted on the body. However, in order to understand dynamic analysis of the most natural
human motion, limitation for the camera and any marker on the body should be removed. Furthermore, digital video camera should
be utilized from the point of view of the real-time imaging.
In order to investigate regarding limitation for the camera and real-time imaging in dynamic analysis of human motion, a digital
video camera was mounted on a motorized video theodolite to acquire digital sequential image and camera rotation parameters in
real-time while tracking a walking human in this paper.
1 INTRODUCTION
2 VIDEO THEODOLITE SYSTEM
Human motion analysis using photogrammetric techniques
have received more attention. There are still some issues which
need to be resolved before human motion analysis may become
operational. These problems include real-time imaging,
tracking, camera parameters while tracking, extraction of
human feature points and so on.
With this objective, the authors have been concentrating on
developing a video theodolite system, and the effectiveness of
the video theodolite system for dynamic analysis of human
motion has been demonstrated [Chikatsu and Murai,1995,
Chikatsu and et al.,1996, Nakano and et al, 1998].
Furthermore, a digital video camera system for human motion
analysis has been developed, and the remarkable features of the
digital video camera system has been also reported by the
authors [Anai and et al, 1998].
However, for the further development of these system in
dynamic analysis of human motion, the video theodolite and
the digital video camera system should be combined so that
digital sequential image and the camera rotation parameters can
be acquired in real-time while tracking a walking human. For
this goal, the video theodolite and the digital video system
were combined in this paper, i.e, a digital video was mounted
on a motorized video theodolite.
This paper describes a application of the video theodolite
system and video camera system for dynamic analysis of human
motion.
The video theodolite system developed by the authors consist
of a CCD camera, a theodolite and a video recorder where the
camera rotation parameters can be acquired in real-time while
tracking a moving object. The current values of the rotation
angles (zenith and horizontal) and distance are continuously
superimposed on the image frames. Figure 1 shows the
motorized video theodolite. CCD 1, the upper one in the Figure
1 is used for precise pointing the target through the monitor,
and CCD 2, the lower one is used as a finder. The details for
these cameras are shown in Table 1.
Figure 1 Motorized Video Theodolite
P2-8-1