| 摘要 |
<p>The two-dimensional positions of a main tracking object (3) and a secondary tracking object (4) are computed by template matching from images taken by X-ray imaging devices (5A, 5B). In a search region-setting unit (15) for setting search regions on the basis of the matching results, when the matching results of either the main tracking object (3) or the secondary tracking object (4) are determined to be unsatisfactory, search regions (230, 240) in the X-ray-captured image (200) of the next frame taken at the next timepoint in the X-ray imaging devices (5A, 5B) are set using the other two-dimensional position and are used for searching for the main tracking object (3) and the secondary tracking object (4) in the next frame. Provided thereby is a moving body-tracking device, which is capable of continuing to track the target even when identification of the target becomes difficult due to changes in the manner in which the target and structures overlap by setting the search regions at appropriate positions that follow the movement of the target.</p> |
