激光散斑照相术(或称单光束主观激光散斑干涉计量)是一种测量位移和应力的常见技术。通常采用的方式是两次曝光法,从而可使位移前和位移后的散斑场迭加。对所得到的散斑图进行逐点的或全场的滤波处理,依照扬氏条纹(由逐点滤波而产生的)或等值条纹(由全场滤波而产生的)我们便可获得散斑图中的位移信息。然而,两次曝光的需求却妨碍该技术直接用于实时问题,诸如碰撞和断裂的问题。鉴于此种情 Laser speckle photography (or single beam subjective laser speckle interferometry) is a common technique for measuring displacement and stress. The common method is double exposure, which allows the speckle fields before and after displacement to be superimposed. Point-by-point or full-field filtering of the resulting speckle pattern, and speckle according to Young’s Stripes (resulting from point-by-point filtering) or equivalent fringes (resulting from the full field filtering) Displacement information in the figure. However, the need for double exposure prevents the technology from being used directly for real-time problems such as crash and break problems. Given this situation