Abstract: A periodic motion observation system specifies, with high accuracy, the locus, speed, and a place in which strain, etc., that occurs in the periodic motion of an observation target. A flash light is emitted every prescribed period from a light source. The periodic motion at a prescribed observation point of an observation target is image-captured by an image-capturing camera. The image pertaining to the periodic motion at the prescribed observation point of the observation target is analyzed by an image analysis device. This image analysis unit extracts, on the basis of the image pertaining to the periodic motion at the prescribed observation point of the observation target, the coordinates of the prescribed observation point at a time when the prescribed observation point of the observation target is irradiated by the light source, and outputs each of the coordinates in tabular form or graphic form.

Abstract: A periodic motion observation system specifies, with high accuracy, the locus, speed, and a place in which strain, etc., that occurs in the periodic motion of an observation target. A flash light is emitted every prescribed period from a light source. The periodic motion at a prescribed observation point of an observation target is image-captured by an image-capturing camera. The image pertaining to the periodic motion at the prescribed observation point of the observation target is analyzed by an image analysis device. This image analysis unit extracts, on the basis of the image pertaining to the periodic motion at the prescribed observation point of the observation target, the coordinates of the prescribed observation point at a time when the prescribed observation point of the observation target is irradiated by the light source, and outputs each of the coordinates in tabular form or graphic form.