Three-dimensional surface shape measurement method and system based on speckle embedded stripes

The invention discloses a three-dimensional surface shape measurement method and system based on speckle embedded stripes. The method comprises the steps: collecting a composite phase shift stripe graph of a measured object, wherein the composite phase shift fringe pattern is an N-step phase shift fringe pattern in which speckles are embedded in a phase domain; calculating the truncation phase ofthe composite phase shift fringe pattern of the measured object; demodulating the composite phase shift fringe pattern to obtain a corresponding deformation speckle pattern; obtaining a plurality of alternative height values according to the obtained truncation phase; finding a corresponding reference speckle pattern according to the plurality of alternative height values; and carrying out correlation operation on the reference speckle pattern and the deformed speckle pattern, carrying out screening according to a correlation operation result to obtain an actual height value, and carrying outreconstructing according t