画像相関法の精度評価

（ランダムパターンと撮影条件の調査）

抄録

The measurement accuracy of strains and strain rates by digitak image correlation method (DIC) is investigated. Displacement distribution of non-deformed stationary object are measured by DIC using various focal lengths and F-numbers. Mean values and standard deviations of the strain and strain rate are evaluated. As a result, it is found that increase of the focal length reduces measurement accuracy and tends to be inversely proportional to observation magnification.