Digital image correlation three-dimensional measurement method and system based on single camera-projector system

The invention relates to a digital image correlation three-dimensional measurement method and system based on a single camera-projector system, and the method comprises the steps: designing a fringe pattern, projecting the fringe pattern on a standard flat plate, and determining an initial absolute phase diagram; designing a speckle pattern, projecting the speckle pattern on the standard flat plate, and collecting a speckle image of the standard flat plate; the method comprises the following steps: acquiring an original speckle image of a to-be-measured object through a single camera-projector measurement system, and moving the object forwards for 5 times, wherein the step length is 1mm; matching is carried out through the speckle images, and an absolute phase diagram of the to-be-measured object is obtained through the initial absolute phase diagram; and the absolute phase of the to-be-measured object is subjected to phase recovery and phase unwrapping, and then three-dimensional information of the to-be-mea