ウェーブレット解析を利用した流速分布の画像計測

概要

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Flow visualization technique has been very useful to understand the physical phenomena in a flow field. Recent developments of the digital image processing produce a new measurement technique for flow velocity using visualized images. It is well known that PIV (Particle Imaging Velocimetry) is now firmly established as a powerful tool to measure the instantaneous flow velocity in an extended flow field. The so-called correlation method, one of the most popular technique in the image measurement, needs the small interrogation window of which the size should be suitable for both flow field and image quality. It also needs long consuming time for the analysis owing to the convolution integral. The wavelet transform enables to examine the image quality such as spatial frequency and to make its analysis short, applying the correlation method on the wavelet domain.
社団法人日本船舶海洋工学会の論文
2001-03-25