Host: The Institute of Image Electronics Engineers of Japan
Three-dimensional recovery of human motions is applicable to analysis and evaluation of various motions and is therefore requested in various fields. However, existent motion capture systems employ fixed cameras and capture only the motion in the narrow area in front of the cameras. So capture of natural motions in a large area have to be performed in an expensive and large studio. This has been the big hindrance against spread of this field. We have improved our previously developed motion capture system that doesn't need camera calibration and have realized the system employing mobile cameras. According to this technique, video capture of motions can be carried out employing three cameras moving with the interested object. In this research, we focus our attention on the difference of walking style affected by shoes, using the mobile motion capture system having a large measurement range. The 3-D recovery and display are performed of walking motions of some models putting on the shoes of different height of heels. Analysis and evaluation of the walking motion are performed as well using the data obtained by the 3-D recovery. In the experiment, two walking motions, one without shoes, i.e., bare feet, and the other with high heel shoes recovered in a 3-D way and were analyzed their characteristics. The employed parameters are the angle of a knee joint, the angle of an elbow joint, the angle of an upper arm, distance of the hand from the defined point, the toe position, and the waist position. These parameters were employed with respect to the both sides of the body. Finally we have found that difference in the walking style can be represented by the angle of a knee joint, the angle of an elbow joint, and the toe position.
