抄録
When we obtain velocity vectors in two dimensional plane using PTV, we often observe bad path-lines. Because they have an adverse effect on the accuracy of the measurement in flow fields, most of them have been removed frequently. But the removal causes the reduction in quantity of informations. So bad path-lines were classified into some types remarking the shapes. Now we propose to correct the shapes automatically. And the goal of this investigation is to save the trouble of processing and much time of processing.
