Huntington IP Consulting Co., Ltd.
Method of evaluating image correlation with speckle patter
An image correlation for images having speckle pattern is evaluated. Modulation transfer function (MTF) curves of speckle-pattern images captured at different times are figured out. Whether a correlation value between the MTF curves meets a threshold is checked. If the correlation value is smaller than the threshold, speckle-pattern images are re-selected for re-figuring out the MTF curves and the correlation value. Thus, error of strain and displacement for digital image correlation owing to blurring images of the on-moving target object is figured out; calculation time of the digital image correlation is reduced; and accuracy on measuring physical parameters of the target object before and after movement is improved for digital image correlation.
National Applied Research Laboratories
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inventional inventional inventional additional additional additional
Yung-Hsiang Wei-Chung Chi-Hung Tzi-Hung Tai-Shan
Chen Wang Huang Chung Liao