| 摘要 |
A motion analysis system utilizing an image processing technique includes a color marker attached to an object which is to be analyzed. Each color marker has a high directivity reflective member on a surface thereof, and the reflection member reflects light having a particular wavelength. A light source generates light for irradiation onto the color marker. A color TV camera aligned in roughly the same direction as that of the light source receives reflected light from the color marker and outputs a color image. A color extraction unit connected to the TV camera, extracts only a particular color from the color image produced by the TV camera. An area calculation unit connected to the color extraction unit, calculates the area of the particular color extracted by the color extraction unit. A diaphragm adjustment unit connected between the TV camera and the area calculation unit adjusts the diaphragm of the TV camera so as to make the area calculated by the area calculation unit equivalent to the actual color area of the color marker and a center of gravity calculation unit connected to the area calculation unit, calculates a position of the center of gravity of the particular color based on the area calculated by the area calculation unit.
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