可視化情報学会誌
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
高次微分項を採用した時空間微分法
照明強度が一定でない場合
西尾 茂奥野 武俊森川 秀作
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1992 年 12 巻 1Supplement 号 p. 127-130

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The spatio-temporal derivative method for flow field image measurement is well known as a high spatial resolution technique. The governing equations are derived using Lagrange derivative, and assuming that the visualized particle image pattern varies smoothly almost everywhere. The authors examine the formulation of governing equation and the brightness function of the flow image in detail, and try to extend this technique to the theory with higher order approximation. The new governing equation can be applied to the case of illumination intensity is not uniform in measurement area.

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