Recently, the optical full field measurement is researched. There is digital image correlation method (DICM) in that. DICM calculates the digital image of which it takes a picture with CCD camera and displacement and the strain distribution can be calculated easily by analyzing the value. In this study examined the strain highly accurate measurement in several 100μ or less minute strain area. The analysis that changed the analysis condition and the improvement of the strain measurement accuracy by the multi-rosette analysis method that used DICM were tried.
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