| 摘要 |
PURPOSE:To precisely measure and analyze a crack state and to offer data for predicting a crack by extracting and enlarging a part of an image which has photographed to crack and deriving a relative moving amount of the crack from a separation point of the crack. CONSTITUTION:A crack image is extracted and enlarged from an image which has photographed a crack which has appeared on the surface of an object and a relative moving amount S of the crack is derived from a separation point of the crack. In this case, complementary object points which are adjacent to the separation point of the crack to each other originally before the crack is generated, and have been separated and formed by the generation of the crack are denoted as, for instance, AL and AR. In such a way, what kind of force has operated on concrete, etc., and in which direction it has worked can be analyzed, and by a result of its analysis, inquiring into the cause of the crack, and a prediction and a counter-measure in the future can be further advanced scientifically. Also, the method for the measurement and the analysis can be performed at a low cost and quickly. |
