【摘要】 本文阐述应用数字图象处理技术解决透射型焦散线的识别及其应力强度因子（SIF）的自动提取方法。针对现有方法的缺点，首次用自动提取方法代替人工提取方法，结果证实该方法的效果是令人满意的。更多还原

【Abstract】 In this paper, an automatic technique for extracting the Stress Intensity Factor (SIF) of cracks from the caustic pattern has been developed by the digital image processing procedures. Compared with the the acquisition method, this method is greatly advanced in performing the data acquisition and processing of caustic curve, and the results of SIF are more satisfactory.更多还原