A213 画像相関情報に基づいた多時刻高次解析に関する研究(第2報)

The authors have developed an algorithm for the higher-order PIV analysis, which focuses on the correlation information defined in spatio-temporal field. In the previous paper, the authors proposed a higher-order algorithm by means of the accumulation of successive correlation maps, and it shows the advantage of multi-frame analysis. In this paper, alternative approach to the higher-order analysis using the differentiation of correlation maps is proposed. Present algorithm was developed based on the fact that the procedure obtaining the maximum point of cross correlation coefficients can be regarded as the differentials of two original distributions.