Full-field three-dimensional deformation measurement method and system based on multidirectional camera and DIC algorithm

The invention discloses a full-field three-dimensional deformation measurement method and system based on a multidirectional camera and a DIC algorithm, and belongs to the field of three-dimensional measurement. The method comprises the steps that at least four binocular vision systems are adopted to synchronously obtain speckle images of a sample to be tested in the deformation process in real time from different directions; and local three-dimensional point clouds, collected by each binocular vision system, of the to-be-tested sample at the non-deformation moment and the deformation moment are obtained through a DIC algorithm, so that a local deformation field of the to-be-tested sample is obtained. According to the method, external parameters of each binocular vision system are calibrated through a method based on global and local mark point matching, local three-dimensional data obtained by each binocular vision system are converted to the same reference coordinate system, coarse registration of four sets