Color grating phase unscrambling method

The invention relates to a structured light technology, in particular to a color grating phase unscrambling method, which comprises the following steps of: performing color-to-number mapping accordingto an acquired color grating to generate a color code; solving a periodic stripe grating principal value based on Fourier transform, completing principal value enhancement optimization, analyzing a sine periodic grating signal through a frequency domain and filtering noise to improve algorithm environment adaptability; analyzing the period of the principal value, and extracting a periodic line; calculating a grating period according to the periodic line, the color code and the principal value; and calculating a phase by using the period and the principal value. According to the method, various defects of a traditional phase solution method are overcome, misleading of solving of other periods due to an initial period error is avoided, and error propagation is skillfully avoided; and compared with a black-and-white